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78SRH-3.3/2-C

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Module DC-DC 1-OUT 3.3V 2A 6.6W 3-Pin SIP
Manufacturer: Murata


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Murata
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Isolated DC/DC Converters
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Isolated Dc/Dc Converters
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78SR 2 Amp Series www.murata-ps.com 2 Amp, 3.3V, 5.0V, & 5.2V Output, High Ef? ciency, Synchronous Switching Regulators FEATURES Murata?s 78SR-3.3/2 (3.3V, 2 Amp output) and 78SR-5/2 (5V, 2 Amp output) step-down, switching regulators are ultra high-ef? ciency, modern replacements for LM78xx series ?? Up to 95% ef? ciency? no costly heat sinks or fans 1.5Amp linear regulators. They are pin- and size-compatible, drop-in replacements for required TO-220 style, 3-pin SIP or modular packages which require heat sinks. And, to ensure the ?? 3.3V/2A & 5V/2A models; pin compatible with 1.5A 78xx lowest installed cost, no messy thermal grease, no mounting hardware and no external regulators components are required for full operation. ?? Wide 8? 32Vdc input voltage range A 200KHz switching frequency, combined with a synchronous recti? er buck regulator topology, provides for ef? ciencies exceeding 95%. 78SR switchers can easily drive 2A loads ?? Two package options: from 12V or 24Vsupplies?at ambient temperatures up to +70?C?without heat sinks, 3-pin vertical mount SIP fans, or thermal derating. A thermally ef? cient 3-pin vertical mount SIP occupies less than Low pro? le, horizontal mount SIP 2 2 0.09in. (58mm ) of pc-board real estate, while a horizontal mount option has an installed ?? No external Input/Output ? lter capacitors required height of less than 0.290in. (7.4mm). ?? ?40 to +70?C full load operation at 24Vin with no 78SR Series 2A switching regulators are lower cost, improved-ef? ciency upgrades for derating many 78HT2, 78SR1, 78ST1, and PT5100 series switchers. Their higher ef? ciency ensures signi? cantly lower heat generation and provides increased run time in battery-powered ?? Excellent load (?0.25%) and line (?0.35%) regulation applications, making these regulators ideal for today?s low power ?green? applications. ?? Low-cost upgrade for 78HT2, 78SR1, 78ST1, and PT5100 switchers TECHNICAL NOTES ?? Open frame design minimizes self-heating & pc-board 1. Input/Output (I/O) Filtering: As shown in the accompanying noise and ripple graphs, footprint 78SR Series regulators exhibit excellent low noise performance with no additional I/O ?? Includes output short-circuit protection and thermal ? lter components. However, if additional noise reduction is required, be sure to use low shutdown ESR capacitors that are rated for continuous operation (with an additional 20% safety ?? Low noise output for powering sensitive instrumentation margin) at the highest input voltage and ambient temperatures. Adding external output capacitors will improve the unit?s load-transient response. Applications in which 78SR regulators are located more than 24 inches (61cm) from Ordering Information the input power supply should include an external 47uF/50V (or greater) aluminum Output Output Input Package Part No. electrolytic capacitor, connected as close as possible to the regulator?s +Vin and GND Voltage Current Voltage Type terminals (pins 1 and 2). An external input capacitor is particularly important if the input 78SR-3.3/2-C 3.3Vdc voltage is applied to the regulator via a mechanical switch or relay. Contact bounce at 78SR-5/2-C 5.0Vdc Vertical turn-on can produce large inductive current spikes, and these current spikes can gener- 78SR-5.2/2-C 5.25Vdc ate potentially damaging voltage transients at the regulator?s input terminals. 2.0A 8.0-32Vdc 78SRH-3.3/2-C 3.3Vdc 2. Input Fusing: 78SR switching regulators are not internally fused. If fusing their input and/or output terminals is required, use the data shown in the Ef? ciency Curves as a 78SRH-5/2-C 5.0Vdc Horizontal guide to select an appropriate slow-blow fuse. 78SRH-5.2/2-C 5.25Vdc For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MPM_78SR-2A.C01 Page 1 of 6 New 5.2V model78SR 2 Amp Series www.murata-ps.com 2 Amp, 3.3V, 5.0V, & 5.2V Output, High Ef? ciency, Synchronous Switching Regulators FEATURES Murata?s 78SR-3.3/2 (3.3V, 2 Amp output) and 78SR-5/2 (5V, 2 Amp output) step-down, switching regulators are ultra high-ef? ciency, modern replacements for LM78xx series ?? Up to 95% ef? ciency? no costly heat sinks or fans 1.5Amp linear regulators. They are pin- and size-compatible, drop-in replacements for required TO-220 style, 3-pin SIP or modular packages which require heat sinks. And, to ensure the ?? 3.3V/2A & 5V/2A models; pin compatible with 1.5A 78xx lowest installed cost, no messy thermal grease, no mounting hardware and no external regulators components are required for full operation. ?? Wide 8? 32Vdc input voltage range A 200KHz switching frequency, combined with a synchronous recti? er buck regulator topology, provides for ef? ciencies exceeding 95%. 78SR switchers can easily drive 2A loads ?? Two package options: from 12V or 24Vsupplies?at ambient temperatures up to +70?C?without heat sinks, 3-pin vertical mount SIP fans, or thermal derating. A thermally ef? cient 3-pin vertical mount SIP occupies less than Low pro? le, horizontal mount SIP 2 2 0.09in. (58mm ) of pc-board real estate, while a horizontal mount option has an installed ?? No external Input/Output ? lter capacitors required height of less than 0.290in. (7.4mm). ?? ?40 to +70?C full load operation at 24Vin with no 78SR Series 2A switching regulators are lower cost, improved-ef? ciency upgrades for derating many 78HT2, 78SR1, 78ST1, and PT5100 series switchers. Their higher ef? ciency ensures signi? cantly lower heat generation and provides increased run time in battery-powered ?? Excellent load (?0.25%) and line (?0.35%) regulation applications, making these regulators ideal for today?s low power ?green? applications. ?? Low-cost upgrade for 78HT2, 78SR1, 78ST1, and PT5100 switchers TECHNICAL NOTES ?? Open frame design minimizes self-heating & pc-board 1. Input/Output (I/O) Filtering: As shown in the accompanying noise and ripple graphs, footprint 78SR Series regulators exhibit excellent low noise performance with no additional I/O ?? Includes output short-circuit protection and thermal ? lter components. However, if additional noise reduction is required, be sure to use low shutdown ESR capacitors that are rated for continuous operation (with an additional 20% safety ?? Low noise output for powering sensitive instrumentation margin) at the highest input voltage and ambient temperatures. Adding external output capacitors will improve the unit?s load-transient response. Applications in which 78SR regulators are located more than 24 inches (61cm) from Ordering Information the input power supply should include an external 47uF/50V (or greater) aluminum Output Output Input Package Part No. electrolytic capacitor, connected as close as possible to the regulator?s +Vin and GND Voltage Current Voltage Type terminals (pins 1 and 2). An external input capacitor is particularly important if the input 78SR-3.3/2-C 3.3Vdc voltage is applied to the regulator via a mechanical switch or relay. Contact bounce at 78SR-5/2-C 5.0Vdc Vertical turn-on can produce large inductive current spikes, and these current spikes can gener- 78SR-5.2/2-C 5.25Vdc ate potentially damaging voltage transients at the regulator?s input terminals. 2.0A 8.0-32Vdc 78SRH-3.3/2-C 3.3Vdc 2. Input Fusing: 78SR switching regulators are not internally fused. If fusing their input and/or output terminals is required, use the data shown in the Ef? ciency Curves as a 78SRH-5/2-C 5.0Vdc Horizontal guide to select an appropriate slow-blow fuse. 78SRH-5.2/2-C 5.25Vdc For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MPM_78SR-2A.C01 Page 1 of 6 New 5.2V model78SR 2 Amp Series 2 Amp, 3.3V, 5.0V, & 5.2V Output, High Ef? ciency, Synchronous Switching Regulators Performance/Functional Speci? cations TECHNICAL NOTES (continued) Typical at TA = +25?C & VIN = 12V, unless otherwise noted 3. Input-Output Isolation: 78SR regulators? internal input and output circuits share a common connection (GND, pin 2), there is no Input/Output electrical isolation between their INPUT (pin 1) and OUTPUT (pin 3) terminals. Models 78SR-3.3/2-C 78SR-5/2-C 78SR-5.2/2-C Output Voltage 3.3Vdc 5.0Vdc 5.25Vdc 4. Overvoltage Protection: 78SR switching regulators do not provide Rated Output Current 2.0A 2.0A 2.0A input or output overvoltage protection. In the extremely rare situation Output Voltage Accuracy ?2% ?2% ?2% where a catastrophic failure occurs, the output voltage may rise to Input Voltage Range 8.0-32Vdc 8.0-32Vdc 8.0-32Vdc excessively high levels. If the load circuit must be protected against Line Regulation (100% load) ?0.35% ?0.35% ?0.35% all possible overvoltage situations, voltage-limiting circuitry must be Load Regulation (0-100% load) ?0.2% ?0.2% ?0.2% provided externally. Quiescent Current (mAdc) 25 typ., 30 max 20 typ., 35max 20 typ., 35max 5. Soldering & Handling Precautions: All units are designed to be Input Current vs. Input Voltage See Ef? ciency Curves hand soldered to pc-boards, using lead-free no-clean solders Ef? ciency See Ef? ciency Curves (+260?C, 5 seconds max.). See the Mechanical Speci? cations sec- Transient Response See Performance Curves tion for pin 1 orientation and recommended pc-board hole dimen- Input & Output Noise See Performance Curves sions. Continuous Output Short Circuit Protection ? 78SR series regulators have limited built-in ESD protection; there- Input/Output Isolation None fore they should always be treated as ESD susceptible devices. Overvoltage Protection None 6. Horizontal-Pin Models (78SRH): 78SRH switching regulators are Undervoltage Protection None pin-compatible replacements for TO-220 style LM78xx linear regula- Environmental tors which are installed with their metal tabs or heat sinks laying ? at Models 78SR-3.3/2-C 78SR-5/2-C 78SR-5.2/2-C on the surface of the pc-board. In replacement applications, 78SRH Operating Temperature ?40 to +70?C units must be soldered to the pc-board such that the insulating body Storage Temperature ?40 to +85?C of diode D1 lies ? at and in contact with the pc-board?s surface. Free Air Convection Cooling ? Humidity (Non-condensing) 0 to 85% Physical Mechanical See Mechanical Speci? cations Package Open-frame SIP Pins 0.025" (0.64mm) square, tin-plated bronze Weight 0.15 ounces (4.2g) Pin Soldering +260?C for 5 seconds Absolute Maximum Ratings ? Input Voltage: +36Vdc Operating Temperature +85?C Output Current 3.0 Amps ? 78SR Series regulators can withstand a continuous short-circuit across their output terminals. However, extended short-circuit operation will decrease the unit?s long-term reliability. ? These are stress ratings only; Exposure of devices to any of these conditions may ad- versely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Speci? cations Table is not implied. ? See derating chart for more information. www.murata-ps.com/support MPM_78SR-2A.C01 Page 2 of 678SR 2 Amp Series www.murata-ps.com 2 Amp, 3.3V, 5.0V, & 5.2V Output, High Ef? ciency, Synchronous Switching Regulators FEATURES Murata?s 78SR-3.3/2 (3.3V, 2 Amp output) and 78SR-5/2 (5V, 2 Amp output) step-down, switching regulators are ultra high-ef? ciency, modern replacements for LM78xx series ?? Up to 95% ef? ciency? no costly heat sinks or fans 1.5Amp linear regulators. They are pin- and size-compatible, drop-in replacements for required TO-220 style, 3-pin SIP or modular packages which require heat sinks. And, to ensure the ?? 3.3V/2A & 5V/2A models; pin compatible with 1.5A 78xx lowest installed cost, no messy thermal grease, no mounting hardware and no external regulators components are required for full operation. ?? Wide 8? 32Vdc input voltage range A 200KHz switching frequency, combined with a synchronous recti? er buck regulator topology, provides for ef? ciencies exceeding 95%. 78SR switchers can easily drive 2A loads ?? Two package options: from 12V or 24Vsupplies?at ambient temperatures up to +70?C?without heat sinks, 3-pin vertical mount SIP fans, or thermal derating. A thermally ef? cient 3-pin vertical mount SIP occupies less than Low pro? le, horizontal mount SIP 2 2 0.09in. (58mm ) of pc-board real estate, while a horizontal mount option has an installed ?? No external Input/Output ? lter capacitors required height of less than 0.290in. (7.4mm). ?? ?40 to +70?C full load operation at 24Vin with no 78SR Series 2A switching regulators are lower cost, improved-ef? ciency upgrades for derating many 78HT2, 78SR1, 78ST1, and PT5100 series switchers. Their higher ef? ciency ensures signi? cantly lower heat generation and provides increased run time in battery-powered ?? Excellent load (?0.25%) and line (?0.35%) regulation applications, making these regulators ideal for today?s low power ?green? applications. ?? Low-cost upgrade for 78HT2, 78SR1, 78ST1, and PT5100 switchers TECHNICAL NOTES ?? Open frame design minimizes self-heating & pc-board 1. Input/Output (I/O) Filtering: As shown in the accompanying noise and ripple graphs, footprint 78SR Series regulators exhibit excellent low noise performance with no additional I/O ?? Includes output short-circuit protection and thermal ? lter components. However, if additional noise reduction is required, be sure to use low shutdown ESR capacitors that are rated for continuous operation (with an additional 20% safety ?? Low noise output for powering sensitive instrumentation margin) at the highest input voltage and ambient temperatures. Adding external output capacitors will improve the unit?s load-transient response. Applications in which 78SR regulators are located more than 24 inches (61cm) from Ordering Information the input power supply should include an external 47uF/50V (or greater) aluminum Output Output Input Package Part No. electrolytic capacitor, connected as close as possible to the regulator?s +Vin and GND Voltage Current Voltage Type terminals (pins 1 and 2). An external input capacitor is particularly important if the input 78SR-3.3/2-C 3.3Vdc voltage is applied to the regulator via a mechanical switch or relay. Contact bounce at 78SR-5/2-C 5.0Vdc Vertical turn-on can produce large inductive current spikes, and these current spikes can gener- 78SR-5.2/2-C 5.25Vdc ate potentially damaging voltage transients at the regulator?s input terminals. 2.0A 8.0-32Vdc 78SRH-3.3/2-C 3.3Vdc 2. Input Fusing: 78SR switching regulators are not internally fused. If fusing their input and/or output terminals is required, use the data shown in the Ef? ciency Curves as a 78SRH-5/2-C 5.0Vdc Horizontal guide to select an appropriate slow-blow fuse. 78SRH-5.2/2-C 5.25Vdc For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MPM_78SR-2A.C01 Page 1 of 6 New 5.2V model78SR 2 Amp Series www.murata-ps.com 2 Amp, 3.3V, 5.0V, & 5.2V Output, High Ef? ciency, Synchronous Switching Regulators FEATURES Murata?s 78SR-3.3/2 (3.3V, 2 Amp output) and 78SR-5/2 (5V, 2 Amp output) step-down, switching regulators are ultra high-ef? ciency, modern replacements for LM78xx series ?? Up to 95% ef? ciency? no costly heat sinks or fans 1.5Amp linear regulators. They are pin- and size-compatible, drop-in replacements for required TO-220 style, 3-pin SIP or modular packages which require heat sinks. And, to ensure the ?? 3.3V/2A & 5V/2A models; pin compatible with 1.5A 78xx lowest installed cost, no messy thermal grease, no mounting hardware and no external regulators components are required for full operation. ?? Wide 8? 32Vdc input voltage range A 200KHz switching frequency, combined with a synchronous recti? er buck regulator topology, provides for ef? ciencies exceeding 95%. 78SR switchers can easily drive 2A loads ?? Two package options: from 12V or 24Vsupplies?at ambient temperatures up to +70?C?without heat sinks, 3-pin vertical mount SIP fans, or thermal derating. A thermally ef? cient 3-pin vertical mount SIP occupies less than Low pro? le, horizontal mount SIP 2 2 0.09in. (58mm ) of pc-board real estate, while a horizontal mount option has an installed ?? No external Input/Output ? lter capacitors required height of less than 0.290in. (7.4mm). ?? ?40 to +70?C full load operation at 24Vin with no 78SR Series 2A switching regulators are lower cost, improved-ef? ciency upgrades for derating many 78HT2, 78SR1, 78ST1, and PT5100 series switchers. Their higher ef? ciency ensures signi? cantly lower heat generation and provides increased run time in battery-powered ?? Excellent load (?0.25%) and line (?0.35%) regulation applications, making these regulators ideal for today?s low power ?green? applications. ?? Low-cost upgrade for 78HT2, 78SR1, 78ST1, and PT5100 switchers TECHNICAL NOTES ?? Open frame design minimizes self-heating & pc-board 1. Input/Output (I/O) Filtering: As shown in the accompanying noise and ripple graphs, footprint 78SR Series regulators exhibit excellent low noise performance with no additional I/O ?? Includes output short-circuit protection and thermal ? lter components. However, if additional noise reduction is required, be sure to use low shutdown ESR capacitors that are rated for continuous operation (with an additional 20% safety ?? Low noise output for powering sensitive instrumentation margin) at the highest input voltage and ambient temperatures. Adding external output capacitors will improve the unit?s load-transient response. Applications in which 78SR regulators are located more than 24 inches (61cm) from Ordering Information the input power supply should include an external 47uF/50V (or greater) aluminum Output Output Input Package Part No. electrolytic capacitor, connected as close as possible to the regulator?s +Vin and GND Voltage Current Voltage Type terminals (pins 1 and 2). An external input capacitor is particularly important if the input 78SR-3.3/2-C 3.3Vdc voltage is applied to the regulator via a mechanical switch or relay. Contact bounce at 78SR-5/2-C 5.0Vdc Vertical turn-on can produce large inductive current spikes, and these current spikes can gener- 78SR-5.2/2-C 5.25Vdc ate potentially damaging voltage transients at the regulator?s input terminals. 2.0A 8.0-32Vdc 78SRH-3.3/2-C 3.3Vdc 2. Input Fusing: 78SR switching regulators are not internally fused. If fusing their input and/or output terminals is required, use the data shown in the Ef? ciency Curves as a 78SRH-5/2-C 5.0Vdc Horizontal guide to select an appropriate slow-blow fuse. 78SRH-5.2/2-C 5.25Vdc For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MPM_78SR-2A.C01 Page 1 of 6 New 5.2V model78SR 2 Amp Series 2 Amp, 3.3V, 5.0V, & 5.2V Output, High Ef? ciency, Synchronous Switching Regulators Performance/Functional Speci? cations TECHNICAL NOTES (continued) Typical at TA = +25?C & VIN = 12V, unless otherwise noted 3. Input-Output Isolation: 78SR regulators? internal input and output circuits share a common connection (GND, pin 2), there is no Input/Output electrical isolation between their INPUT (pin 1) and OUTPUT (pin 3) terminals. Models 78SR-3.3/2-C 78SR-5/2-C 78SR-5.2/2-C Output Voltage 3.3Vdc 5.0Vdc 5.25Vdc 4. Overvoltage Protection: 78SR switching regulators do not provide Rated Output Current 2.0A 2.0A 2.0A input or output overvoltage protection. In the extremely rare situation Output Voltage Accuracy ?2% ?2% ?2% where a catastrophic failure occurs, the output voltage may rise to Input Voltage Range 8.0-32Vdc 8.0-32Vdc 8.0-32Vdc excessively high levels. If the load circuit must be protected against Line Regulation (100% load) ?0.35% ?0.35% ?0.35% all possible overvoltage situations, voltage-limiting circuitry must be Load Regulation (0-100% load) ?0.2% ?0.2% ?0.2% provided externally. Quiescent Current (mAdc) 25 typ., 30 max 20 typ., 35max 20 typ., 35max 5. Soldering & Handling Precautions: All units are designed to be Input Current vs. Input Voltage See Ef? ciency Curves hand soldered to pc-boards, using lead-free no-clean solders Ef? ciency See Ef? ciency Curves (+260?C, 5 seconds max.). See the Mechanical Speci? cations sec- Transient Response See Performance Curves tion for pin 1 orientation and recommended pc-board hole dimen- Input & Output Noise See Performance Curves sions. Continuous Output Short Circuit Protection ? 78SR series regulators have limited built-in ESD protection; there- Input/Output Isolation None fore they should always be treated as ESD susceptible devices. Overvoltage Protection None 6. Horizontal-Pin Models (78SRH): 78SRH switching regulators are Undervoltage Protection None pin-compatible replacements for TO-220 style LM78xx linear regula- Environmental tors which are installed with their metal tabs or heat sinks laying ? at Models 78SR-3.3/2-C 78SR-5/2-C 78SR-5.2/2-C on the surface of the pc-board. In replacement applications, 78SRH Operating Temperature ?40 to +70?C units must be soldered to the pc-board such that the insulating body Storage Temperature ?40 to +85?C of diode D1 lies ? at and in contact with the pc-board?s surface. Free Air Convection Cooling ? Humidity (Non-condensing) 0 to 85% Physical Mechanical See Mechanical Speci? cations Package Open-frame SIP Pins 0.025" (0.64mm) square, tin-plated bronze Weight 0.15 ounces (4.2g) Pin Soldering +260?C for 5 seconds Absolute Maximum Ratings ? Input Voltage: +36Vdc Operating Temperature +85?C Output Current 3.0 Amps ? 78SR Series regulators can withstand a continuous short-circuit across their output terminals. However, extended short-circuit operation will decrease the unit?s long-term reliability. ? These are stress ratings only; Exposure of devices to any of these conditions may ad- versely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Speci? cations Table is not implied. ? See derating chart for more information. www.murata-ps.com/support MPM_78SR-2A.C01 Page 2 of 678SR 2 Amp Series 2 Amp, 3.3V, 5.0V, & 5.2V Output, High Typical Performance Curves TA = +25?C, VIN as indicated Ef? ciency, Synchronous Switching Regulators Noise and Ripple - 10% and 100% Load, 20 MHz Bandwidth 78SR-3.3/2 Vin = 12V, ILOAD = 0.2A 78SR-3.3/2 Vin = 12V, ILOAD = 2.0A 78SR-3.3/2 Vin = 24V, ILOAD = 2.0A 78SR-5/2 Vin = 12V, ILOAD = 0.2A 78SR-5/2 Vin = 12V, ILOAD = 2.0A 78SR-5/2 Vin = 24V, ILOAD = 2.0A Transient Response - 50% Load Step 78SR-3.3/2 25% to 75% Load Step 78SR-3.3/2 25% to 75% Load Step 78SR-3.3/2 75% to 25% Load Step Vin = 12V Vin = 24V Vin = 12V CH1: Vout, 50mV/div. CH1: Vout, 50mV/div. CH1: Vout, 50mV/div. CH2: Load Current 1A/div. CH2: Load Current 1A/div. CH2: Load Current 1A/div. 25% 75% 25% 75% 75% 25% 40?sec/div. 40?sec/div. 40?sec/div. 78SR-5/2 25% to 75% Load Step 78SR-5/2 75% to 25% Load Step 78SR-5/2 25% to 75% Load Step Vin = 12V Vin = 24V Vin = 12V CH1: Vout, 50mV/div. CH1: Vout, 50mV/div. CH1: Vout, 50mV/div. CH2: Load Current 1A/div. CH2: Load Current 1A/div. CH2: Load Current 1A/div. 25% 75% 25% 75% 75% 25% 40?sec/div. 40?sec/div. 40?sec/div. www.murata-ps.com/support MPM_78SR-2A.C01 Page 3 of 678SR 2 Amp Series www.murata-ps.com 2 Amp, 3.3V, 5.0V, & 5.2V Output, High Ef? ciency, Synchronous Switching Regulators FEATURES Murata?s 78SR-3.3/2 (3.3V, 2 Amp output) and 78SR-5/2 (5V, 2 Amp output) step-down, switching regulators are ultra high-ef? ciency, modern replacements for LM78xx series ?? Up to 95% ef? ciency? no costly heat sinks or fans 1.5Amp linear regulators. They are pin- and size-compatible, drop-in replacements for required TO-220 style, 3-pin SIP or modular packages which require heat sinks. And, to ensure the ?? 3.3V/2A & 5V/2A models; pin compatible with 1.5A 78xx lowest installed cost, no messy thermal grease, no mounting hardware and no external regulators components are required for full operation. ?? Wide 8? 32Vdc input voltage range A 200KHz switching frequency, combined with a synchronous recti? er buck regulator topology, provides for ef? ciencies exceeding 95%. 78SR switchers can easily drive 2A loads ?? Two package options: from 12V or 24Vsupplies?at ambient temperatures up to +70?C?without heat sinks, 3-pin vertical mount SIP fans, or thermal derating. A thermally ef? cient 3-pin vertical mount SIP occupies less than Low pro? le, horizontal mount SIP 2 2 0.09in. (58mm ) of pc-board real estate, while a horizontal mount option has an installed ?? No external Input/Output ? lter capacitors required height of less than 0.290in. (7.4mm). ?? ?40 to +70?C full load operation at 24Vin with no 78SR Series 2A switching regulators are lower cost, improved-ef? ciency upgrades for derating many 78HT2, 78SR1, 78ST1, and PT5100 series switchers. Their higher ef? ciency ensures signi? cantly lower heat generation and provides increased run time in battery-powered ?? Excellent load (?0.25%) and line (?0.35%) regulation applications, making these regulators ideal for today?s low power ?green? applications. ?? Low-cost upgrade for 78HT2, 78SR1, 78ST1, and PT5100 switchers TECHNICAL NOTES ?? Open frame design minimizes self-heating & pc-board 1. Input/Output (I/O) Filtering: As shown in the accompanying noise and ripple graphs, footprint 78SR Series regulators exhibit excellent low noise performance with no additional I/O ?? Includes output short-circuit protection and thermal ? lter components. However, if additional noise reduction is required, be sure to use low shutdown ESR capacitors that are rated for continuous operation (with an additional 20% safety ?? Low noise output for powering sensitive instrumentation margin) at the highest input voltage and ambient temperatures. Adding external output capacitors will improve the unit?s load-transient response. Applications in which 78SR regulators are located more than 24 inches (61cm) from Ordering Information the input power supply should include an external 47uF/50V (or greater) aluminum Output Output Input Package Part No. electrolytic capacitor, connected as close as possible to the regulator?s +Vin and GND Voltage Current Voltage Type terminals (pins 1 and 2). An external input capacitor is particularly important if the input 78SR-3.3/2-C 3.3Vdc voltage is applied to the regulator via a mechanical switch or relay. Contact bounce at 78SR-5/2-C 5.0Vdc Vertical turn-on can produce large inductive current spikes, and these current spikes can gener- 78SR-5.2/2-C 5.25Vdc ate potentially damaging voltage transients at the regulator?s input terminals. 2.0A 8.0-32Vdc 78SRH-3.3/2-C 3.3Vdc 2. Input Fusing: 78SR switching regulators are not internally fused. If fusing their input and/or output terminals is required, use the data shown in the Ef? ciency Curves as a 78SRH-5/2-C 5.0Vdc Horizontal guide to select an appropriate slow-blow fuse. 78SRH-5.2/2-C 5.25Vdc For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MPM_78SR-2A.C01 Page 1 of 6 New 5.2V model78SR 2 Amp Series www.murata-ps.com 2 Amp, 3.3V, 5.0V, & 5.2V Output, High Ef? ciency, Synchronous Switching Regulators FEATURES Murata?s 78SR-3.3/2 (3.3V, 2 Amp output) and 78SR-5/2 (5V, 2 Amp output) step-down, switching regulators are ultra high-ef? ciency, modern replacements for LM78xx series ?? Up to 95% ef? ciency? no costly heat sinks or fans 1.5Amp linear regulators. They are pin- and size-compatible, drop-in replacements for required TO-220 style, 3-pin SIP or modular packages which require heat sinks. And, to ensure the ?? 3.3V/2A & 5V/2A models; pin compatible with 1.5A 78xx lowest installed cost, no messy thermal grease, no mounting hardware and no external regulators components are required for full operation. ?? Wide 8? 32Vdc input voltage range A 200KHz switching frequency, combined with a synchronous recti? er buck regulator topology, provides for ef? ciencies exceeding 95%. 78SR switchers can easily drive 2A loads ?? Two package options: from 12V or 24Vsupplies?at ambient temperatures up to +70?C?without heat sinks, 3-pin vertical mount SIP fans, or thermal derating. A thermally ef? cient 3-pin vertical mount SIP occupies less than Low pro? le, horizontal mount SIP 2 2 0.09in. (58mm ) of pc-board real estate, while a horizontal mount option has an installed ?? No external Input/Output ? lter capacitors required height of less than 0.290in. (7.4mm). ?? ?40 to +70?C full load operation at 24Vin with no 78SR Series 2A switching regulators are lower cost, improved-ef? ciency upgrades for derating many 78HT2, 78SR1, 78ST1, and PT5100 series switchers. Their higher ef? ciency ensures signi? cantly lower heat generation and provides increased run time in battery-powered ?? Excellent load (?0.25%) and line (?0.35%) regulation applications, making these regulators ideal for today?s low power ?green? applications. ?? Low-cost upgrade for 78HT2, 78SR1, 78ST1, and PT5100 switchers TECHNICAL NOTES ?? Open frame design minimizes self-heating & pc-board 1. Input/Output (I/O) Filtering: As shown in the accompanying noise and ripple graphs, footprint 78SR Series regulators exhibit excellent low noise performance with no additional I/O ?? Includes output short-circuit protection and thermal ? lter components. However, if additional noise reduction is required, be sure to use low shutdown ESR capacitors that are rated for continuous operation (with an additional 20% safety ?? Low noise output for powering sensitive instrumentation margin) at the highest input voltage and ambient temperatures. Adding external output capacitors will improve the unit?s load-transient response. Applications in which 78SR regulators are located more than 24 inches (61cm) from Ordering Information the input power supply should include an external 47uF/50V (or greater) aluminum Output Output Input Package Part No. electrolytic capacitor, connected as close as possible to the regulator?s +Vin and GND Voltage Current Voltage Type terminals (pins 1 and 2). An external input capacitor is particularly important if the input 78SR-3.3/2-C 3.3Vdc voltage is applied to the regulator via a mechanical switch or relay. Contact bounce at 78SR-5/2-C 5.0Vdc Vertical turn-on can produce large inductive current spikes, and these current spikes can gener- 78SR-5.2/2-C 5.25Vdc ate potentially damaging voltage transients at the regulator?s input terminals. 2.0A 8.0-32Vdc 78SRH-3.3/2-C 3.3Vdc 2. Input Fusing: 78SR switching regulators are not internally fused. If fusing their input and/or output terminals is required, use the data shown in the Ef? ciency Curves as a 78SRH-5/2-C 5.0Vdc Horizontal guide to select an appropriate slow-blow fuse. 78SRH-5.2/2-C 5.25Vdc For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MPM_78SR-2A.C01 Page 1 of 6 New 5.2V model78SR 2 Amp Series 2 Amp, 3.3V, 5.0V, & 5.2V Output, High Ef? ciency, Synchronous Switching Regulators Performance/Functional Speci? cations TECHNICAL NOTES (continued) Typical at TA = +25?C & VIN = 12V, unless otherwise noted 3. Input-Output Isolation: 78SR regulators? internal input and output circuits share a common connection (GND, pin 2), there is no Input/Output electrical isolation between their INPUT (pin 1) and OUTPUT (pin 3) terminals. Models 78SR-3.3/2-C 78SR-5/2-C 78SR-5.2/2-C Output Voltage 3.3Vdc 5.0Vdc 5.25Vdc 4. Overvoltage Protection: 78SR switching regulators do not provide Rated Output Current 2.0A 2.0A 2.0A input or output overvoltage protection. In the extremely rare situation Output Voltage Accuracy ?2% ?2% ?2% where a catastrophic failure occurs, the output voltage may rise to Input Voltage Range 8.0-32Vdc 8.0-32Vdc 8.0-32Vdc excessively high levels. If the load circuit must be protected against Line Regulation (100% load) ?0.35% ?0.35% ?0.35% all possible overvoltage situations, voltage-limiting circuitry must be Load Regulation (0-100% load) ?0.2% ?0.2% ?0.2% provided externally. Quiescent Current (mAdc) 25 typ., 30 max 20 typ., 35max 20 typ., 35max 5. Soldering & Handling Precautions: All units are designed to be Input Current vs. Input Voltage See Ef? ciency Curves hand soldered to pc-boards, using lead-free no-clean solders Ef? ciency See Ef? ciency Curves (+260?C, 5 seconds max.). See the Mechanical Speci? cations sec- Transient Response See Performance Curves tion for pin 1 orientation and recommended pc-board hole dimen- Input & Output Noise See Performance Curves sions. Continuous Output Short Circuit Protection ? 78SR series regulators have limited built-in ESD protection; there- Input/Output Isolation None fore they should always be treated as ESD susceptible devices. Overvoltage Protection None 6. Horizontal-Pin Models (78SRH): 78SRH switching regulators are Undervoltage Protection None pin-compatible replacements for TO-220 style LM78xx linear regula- Environmental tors which are installed with their metal tabs or heat sinks laying ? at Models 78SR-3.3/2-C 78SR-5/2-C 78SR-5.2/2-C on the surface of the pc-board. In replacement applications, 78SRH Operating Temperature ?40 to +70?C units must be soldered to the pc-board such that the insulating body Storage Temperature ?40 to +85?C of diode D1 lies ? at and in contact with the pc-board?s surface. Free Air Convection Cooling ? Humidity (Non-condensing) 0 to 85% Physical Mechanical See Mechanical Speci? cations Package Open-frame SIP Pins 0.025" (0.64mm) square, tin-plated bronze Weight 0.15 ounces (4.2g) Pin Soldering +260?C for 5 seconds Absolute Maximum Ratings ? Input Voltage: +36Vdc Operating Temperature +85?C Output Current 3.0 Amps ? 78SR Series regulators can withstand a continuous short-circuit across their output terminals. However, extended short-circuit operation will decrease the unit?s long-term reliability. ? These are stress ratings only; Exposure of devices to any of these conditions may ad- versely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Speci? cations Table is not implied. ? See derating chart for more information. www.murata-ps.com/support MPM_78SR-2A.C01 Page 2 of 678SR 2 Amp Series www.murata-ps.com 2 Amp, 3.3V, 5.0V, & 5.2V Output, High Ef? ciency, Synchronous Switching Regulators FEATURES Murata?s 78SR-3.3/2 (3.3V, 2 Amp output) and 78SR-5/2 (5V, 2 Amp output) step-down, switching regulators are ultra high-ef? ciency, modern replacements for LM78xx series ?? Up to 95% ef? ciency? no costly heat sinks or fans 1.5Amp linear regulators. They are pin- and size-compatible, drop-in replacements for required TO-220 style, 3-pin SIP or modular packages which require heat sinks. And, to ensure the ?? 3.3V/2A & 5V/2A models; pin compatible with 1.5A 78xx lowest installed cost, no messy thermal grease, no mounting hardware and no external regulators components are required for full operation. ?? Wide 8? 32Vdc input voltage range A 200KHz switching frequency, combined with a synchronous recti? er buck regulator topology, provides for ef? ciencies exceeding 95%. 78SR switchers can easily drive 2A loads ?? Two package options: from 12V or 24Vsupplies?at ambient temperatures up to +70?C?without heat sinks, 3-pin vertical mount SIP fans, or thermal derating. A thermally ef? cient 3-pin vertical mount SIP occupies less than Low pro? le, horizontal mount SIP 2 2 0.09in. (58mm ) of pc-board real estate, while a horizontal mount option has an installed ?? No external Input/Output ? lter capacitors required height of less than 0.290in. (7.4mm). ?? ?40 to +70?C full load operation at 24Vin with no 78SR Series 2A switching regulators are lower cost, improved-ef? ciency upgrades for derating many 78HT2, 78SR1, 78ST1, and PT5100 series switchers. Their higher ef? ciency ensures signi? cantly lower heat generation and provides increased run time in battery-powered ?? Excellent load (?0.25%) and line (?0.35%) regulation applications, making these regulators ideal for today?s low power ?green? applications. ?? Low-cost upgrade for 78HT2, 78SR1, 78ST1, and PT5100 switchers TECHNICAL NOTES ?? Open frame design minimizes self-heating & pc-board 1. Input/Output (I/O) Filtering: As shown in the accompanying noise and ripple graphs, footprint 78SR Series regulators exhibit excellent low noise performance with no additional I/O ?? Includes output short-circuit protection and thermal ? lter components. However, if additional noise reduction is required, be sure to use low shutdown ESR capacitors that are rated for continuous operation (with an additional 20% safety ?? Low noise output for powering sensitive instrumentation margin) at the highest input voltage and ambient temperatures. Adding external output capacitors will improve the unit?s load-transient response. Applications in which 78SR regulators are located more than 24 inches (61cm) from Ordering Information the input power supply should include an external 47uF/50V (or greater) aluminum Output Output Input Package Part No. electrolytic capacitor, connected as close as possible to the regulator?s +Vin and GND Voltage Current Voltage Type terminals (pins 1 and 2). An external input capacitor is particularly important if the input 78SR-3.3/2-C 3.3Vdc voltage is applied to the regulator via a mechanical switch or relay. Contact bounce at 78SR-5/2-C 5.0Vdc Vertical turn-on can produce large inductive current spikes, and these current spikes can gener- 78SR-5.2/2-C 5.25Vdc ate potentially damaging voltage transients at the regulator?s input terminals. 2.0A 8.0-32Vdc 78SRH-3.3/2-C 3.3Vdc 2. Input Fusing: 78SR switching regulators are not internally fused. If fusing their input and/or output terminals is required, use the data shown in the Ef? ciency Curves as a 78SRH-5/2-C 5.0Vdc Horizontal guide to select an appropriate slow-blow fuse. 78SRH-5.2/2-C 5.25Vdc For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MPM_78SR-2A.C01 Page 1 of 6 New 5.2V model78SR 2 Amp Series www.murata-ps.com 2 Amp, 3.3V, 5.0V, & 5.2V Output, High Ef? ciency, Synchronous Switching Regulators FEATURES Murata?s 78SR-3.3/2 (3.3V, 2 Amp output) and 78SR-5/2 (5V, 2 Amp output) step-down, switching regulators are ultra high-ef? ciency, modern replacements for LM78xx series ?? Up to 95% ef? ciency? no costly heat sinks or fans 1.5Amp linear regulators. They are pin- and size-compatible, drop-in replacements for required TO-220 style, 3-pin SIP or modular packages which require heat sinks. And, to ensure the ?? 3.3V/2A & 5V/2A models; pin compatible with 1.5A 78xx lowest installed cost, no messy thermal grease, no mounting hardware and no external regulators components are required for full operation. ?? Wide 8? 32Vdc input voltage range A 200KHz switching frequency, combined with a synchronous recti? er buck regulator topology, provides for ef? ciencies exceeding 95%. 78SR switchers can easily drive 2A loads ?? Two package options: from 12V or 24Vsupplies?at ambient temperatures up to +70?C?without heat sinks, 3-pin vertical mount SIP fans, or thermal derating. A thermally ef? cient 3-pin vertical mount SIP occupies less than Low pro? le, horizontal mount SIP 2 2 0.09in. (58mm ) of pc-board real estate, while a horizontal mount option has an installed ?? No external Input/Output ? lter capacitors required height of less than 0.290in. (7.4mm). ?? ?40 to +70?C full load operation at 24Vin with no 78SR Series 2A switching regulators are lower cost, improved-ef? ciency upgrades for derating many 78HT2, 78SR1, 78ST1, and PT5100 series switchers. Their higher ef? ciency ensures signi? cantly lower heat generation and provides increased run time in battery-powered ?? Excellent load (?0.25%) and line (?0.35%) regulation applications, making these regulators ideal for today?s low power ?green? applications. ?? Low-cost upgrade for 78HT2, 78SR1, 78ST1, and PT5100 switchers TECHNICAL NOTES ?? Open frame design minimizes self-heating & pc-board 1. Input/Output (I/O) Filtering: As shown in the accompanying noise and ripple graphs, footprint 78SR Series regulators exhibit excellent low noise performance with no additional I/O ?? Includes output short-circuit protection and thermal ? lter components. However, if additional noise reduction is required, be sure to use low shutdown ESR capacitors that are rated for continuous operation (with an additional 20% safety ?? Low noise output for powering sensitive instrumentation margin) at the highest input voltage and ambient temperatures. Adding external output capacitors will improve the unit?s load-transient response. Applications in which 78SR regulators are located more than 24 inches (61cm) from Ordering Information the input power supply should include an external 47uF/50V (or greater) aluminum Output Output Input Package Part No. electrolytic capacitor, connected as close as possible to the regulator?s +Vin and GND Voltage Current Voltage Type terminals (pins 1 and 2). An external input capacitor is particularly important if the input 78SR-3.3/2-C 3.3Vdc voltage is applied to the regulator via a mechanical switch or relay. Contact bounce at 78SR-5/2-C 5.0Vdc Vertical turn-on can produce large inductive current spikes, and these current spikes can gener- 78SR-5.2/2-C 5.25Vdc ate potentially damaging voltage transients at the regulator?s input terminals. 2.0A 8.0-32Vdc 78SRH-3.3/2-C 3.3Vdc 2. Input Fusing: 78SR switching regulators are not internally fused. If fusing their input and/or output terminals is required, use the data shown in the Ef? ciency Curves as a 78SRH-5/2-C 5.0Vdc Horizontal guide to select an appropriate slow-blow fuse. 78SRH-5.2/2-C 5.25Vdc For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MPM_78SR-2A.C01 Page 1 of 6 New 5.2V model78SR 2 Amp Series 2 Amp, 3.3V, 5.0V, & 5.2V Output, High Ef? ciency, Synchronous Switching Regulators Performance/Functional Speci? cations TECHNICAL NOTES (continued) Typical at TA = +25?C & VIN = 12V, unless otherwise noted 3. Input-Output Isolation: 78SR regulators? internal input and output circuits share a common connection (GND, pin 2), there is no Input/Output electrical isolation between their INPUT (pin 1) and OUTPUT (pin 3) terminals. Models 78SR-3.3/2-C 78SR-5/2-C 78SR-5.2/2-C Output Voltage 3.3Vdc 5.0Vdc 5.25Vdc 4. Overvoltage Protection: 78SR switching regulators do not provide Rated Output Current 2.0A 2.0A 2.0A input or output overvoltage protection. In the extremely rare situation Output Voltage Accuracy ?2% ?2% ?2% where a catastrophic failure occurs, the output voltage may rise to Input Voltage Range 8.0-32Vdc 8.0-32Vdc 8.0-32Vdc excessively high levels. If the load circuit must be protected against Line Regulation (100% load) ?0.35% ?0.35% ?0.35% all possible overvoltage situations, voltage-limiting circuitry must be Load Regulation (0-100% load) ?0.2% ?0.2% ?0.2% provided externally. Quiescent Current (mAdc) 25 typ., 30 max 20 typ., 35max 20 typ., 35max 5. Soldering & Handling Precautions: All units are designed to be Input Current vs. Input Voltage See Ef? ciency Curves hand soldered to pc-boards, using lead-free no-clean solders Ef? ciency See Ef? ciency Curves (+260?C, 5 seconds max.). See the Mechanical Speci? cations sec- Transient Response See Performance Curves tion for pin 1 orientation and recommended pc-board hole dimen- Input & Output Noise See Performance Curves sions. Continuous Output Short Circuit Protection ? 78SR series regulators have limited built-in ESD protection; there- Input/Output Isolation None fore they should always be treated as ESD susceptible devices. Overvoltage Protection None 6. Horizontal-Pin Models (78SRH): 78SRH switching regulators are Undervoltage Protection None pin-compatible replacements for TO-220 style LM78xx linear regula- Environmental tors which are installed with their metal tabs or heat sinks laying ? at Models 78SR-3.3/2-C 78SR-5/2-C 78SR-5.2/2-C on the surface of the pc-board. In replacement applications, 78SRH Operating Temperature ?40 to +70?C units must be soldered to the pc-board such that the insulating body Storage Temperature ?40 to +85?C of diode D1 lies ? at and in contact with the pc-board?s surface. Free Air Convection Cooling ? Humidity (Non-condensing) 0 to 85% Physical Mechanical See Mechanical Speci? cations Package Open-frame SIP Pins 0.025" (0.64mm) square, tin-plated bronze Weight 0.15 ounces (4.2g) Pin Soldering +260?C for 5 seconds Absolute Maximum Ratings ? Input Voltage: +36Vdc Operating Temperature +85?C Output Current 3.0 Amps ? 78SR Series regulators can withstand a continuous short-circuit across their output terminals. However, extended short-circuit operation will decrease the unit?s long-term reliability. ? These are stress ratings only; Exposure of devices to any of these conditions may ad- versely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Speci? cations Table is not implied. ? See derating chart for more information. www.murata-ps.com/support MPM_78SR-2A.C01 Page 2 of 678SR 2 Amp Series 2 Amp, 3.3V, 5.0V, & 5.2V Output, High Typical Performance Curves TA = +25?C, VIN as indicated Ef? ciency, Synchronous Switching Regulators Noise and Ripple - 10% and 100% Load, 20 MHz Bandwidth 78SR-3.3/2 Vin = 12V, ILOAD = 0.2A 78SR-3.3/2 Vin = 12V, ILOAD = 2.0A 78SR-3.3/2 Vin = 24V, ILOAD = 2.0A 78SR-5/2 Vin = 12V, ILOAD = 0.2A 78SR-5/2 Vin = 12V, ILOAD = 2.0A 78SR-5/2 Vin = 24V, ILOAD = 2.0A Transient Response - 50% Load Step 78SR-3.3/2 25% to 75% Load Step 78SR-3.3/2 25% to 75% Load Step 78SR-3.3/2 75% to 25% Load Step Vin = 12V Vin = 24V Vin = 12V CH1: Vout, 50mV/div. CH1: Vout, 50mV/div. CH1: Vout, 50mV/div. CH2: Load Current 1A/div. CH2: Load Current 1A/div. CH2: Load Current 1A/div. 25% 75% 25% 75% 75% 25% 40?sec/div. 40?sec/div. 40?sec/div. 78SR-5/2 25% to 75% Load Step 78SR-5/2 75% to 25% Load Step 78SR-5/2 25% to 75% Load Step Vin = 12V Vin = 24V Vin = 12V CH1: Vout, 50mV/div. CH1: Vout, 50mV/div. CH1: Vout, 50mV/div. CH2: Load Current 1A/div. CH2: Load Current 1A/div. CH2: Load Current 1A/div. 25% 75% 25% 75% 75% 25% 40?sec/div. 40?sec/div. 40?sec/div. www.murata-ps.com/support MPM_78SR-2A.C01 Page 3 of 6

Tariff Concession Code
Tariff Desc

9601650
8504.40.90 CONVERTERS, DC/DC, power output not exceeding 5 W, being ANY of the following:
(a) single in line package;
(b) dual in line;
(c) surface mount device
Op. 01.07.1996 Dec.27.02.1996 - TC 9601650

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