Product Information

MIC2145YMM TR

Product Image X-ON

Switching Voltage Regulators Boost Regulator
Manufacturer: Microchip


Price (Ex GST)

From 2.3239

872 - Global Stock
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Fri. 11 Dec to Thu. 17 Dec
MOQ: 1 Multiples:
Pack Size :   1
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872 - Global Stock


Ships to you between Fri. 11 Dec to Thu. 17 Dec
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MOQ : 1
Multiples : 1

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MIC2145YMM TR
Microchip

1 : $ 2.3239

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891 - Global Stock


Ships to you between Fri. 11 Dec to Thu. 17 Dec
Calender

MOQ : 1
Multiples : 1

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MIC2145YMM TR
Microchip

1 : $ 3.9345
25 : $ 3.2853
100 : $ 3.0453

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Manufacturer
Microchip
Product Category
Switching Voltage Regulators
RoHS - XON
Y Icon ROHS
Mounting Style
Smd/Smt
Output Voltage
16 V
Output Current
500 mA
Number of Outputs
1 Output
Input Voltage MAX
16 V
Topology
Boost, Flyback
Input Voltage MIN
2.4 V
Switching Frequency
450 Khz
Minimum Operating Temperature
- 40 C
Maximum Operating Temperature
+85 C
Series
Mic2145
Packaging
Tube
Package / Case
MSOP-8
Type
Boost Converter
Brand
Microchip Technology / Micrel
Factory Pack Quantity :
100
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MIC2145 Micrel, Inc. MIC2145 High Efficiency 2.5W Boost Converter General Description Features The MIC2145 is a small size boost switching regulator that ?2.4V to 16V input voltage can provide over 2.5W of output power. The input voltage ? Output adjustable to 16V range is between 2.4V to 16V, making the device suitable for ?Programmable peak current limit one-cell Li-Ion and 3- to 4-cell alkaline/NiCad/NiMH applica- ? Soft start tions. The output voltage of the MIC2145 can be adjusted up ? Up to 450kHz switching frequency to 16V. ?0.5?A shutdown current ? 200?A quiescent current The MIC2145 is well suited for portable, space-sensitive ? Capable of 5V/ 500mA output with 3.3V input applications. Its typical 450kHz operation allows small sur- ? Achieves over 85% efficiency face mount external components to be used. The MIC2145 ?Implements low power BOOST, SEPIC, and FLYBACK has a low quiescent current of 200?A, and a typical shutdown topologies current of 0.5?A. The MIC2145 is capable of high efficiencies ? MSOP-8 and 3mm?3mm MLF?-10L in a small board area. Applications The MIC2145 features a low-on resistance internal switch that allows it to provide over 2.5W of output power. The peak ?Flash LED driver switch current can be programmed through an external ? LCD bias supply resistor. This allows the user to set the peak switch current at ? White LED driver the level where maximum efficiency occurs. It also allows the ? DSL bias supply user to further optimize for efficiency and inductor size by ? Local 3V to 5V conversion setting the peak current below the level of inductor saturation. The MIC2145 is available in an MSOP-8 and 3mm?3mm MLF?-10L package with an ambient operating temperature range from ?40?C to +85?C. Ordering Information Part Number Voltage Ambient Standard Pb-Free Temp. Range Package MIC2145BMM MIC2145YMM Adj ?40?C to +85?C 8-lead MSOP MIC2145BML MIC2145YML Adj ?40?C to +85?C 10-lead MLF? Typical Application L1 10V Output V IN Efficiency 3.0V to 5.0V 10?H 90 D1 C IN 15 V OUT 10?F/6.3V 85 EN SW 10V/150mA 4 6 80 PGND VDD COUT MIC2145BMM 10?F/16V 75 3 7 FB RSET 70 2 8 SS SGND 65 V = 3.0V IN 60 I Limit 10 100 1000 OUTPUT CURRENT (mA) Adjustable Output Boost Converter with Programmable Peak Switch Current MLF and MicroLeadFrame are trademarks of Amkor Technologies, Inc. Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com April 2005 1 M9999-042205 EFFICIENCY (%)MIC2145 Micrel, Inc. MIC2145 High Efficiency 2.5W Boost Converter General Description Features The MIC2145 is a small size boost switching regulator that ?2.4V to 16V input voltage can provide over 2.5W of output power. The input voltage ? Output adjustable to 16V range is between 2.4V to 16V, making the device suitable for ?Programmable peak current limit one-cell Li-Ion and 3- to 4-cell alkaline/NiCad/NiMH applica- ? Soft start tions. The output voltage of the MIC2145 can be adjusted up ? Up to 450kHz switching frequency to 16V. ?0.5?A shutdown current ? 200?A quiescent current The MIC2145 is well suited for portable, space-sensitive ? Capable of 5V/ 500mA output with 3.3V input applications. Its typical 450kHz operation allows small sur- ? Achieves over 85% efficiency face mount external components to be used. The MIC2145 ?Implements low power BOOST, SEPIC, and FLYBACK has a low quiescent current of 200?A, and a typical shutdown topologies current of 0.5?A. The MIC2145 is capable of high efficiencies ? MSOP-8 and 3mm?3mm MLF?-10L in a small board area. Applications The MIC2145 features a low-on resistance internal switch that allows it to provide over 2.5W of output power. The peak ?Flash LED driver switch current can be programmed through an external ? LCD bias supply resistor. This allows the user to set the peak switch current at ? White LED driver the level where maximum efficiency occurs. It also allows the ? DSL bias supply user to further optimize for efficiency and inductor size by ? Local 3V to 5V conversion setting the peak current below the level of inductor saturation. The MIC2145 is available in an MSOP-8 and 3mm?3mm MLF?-10L package with an ambient operating temperature range from ?40?C to +85?C. Ordering Information Part Number Voltage Ambient Standard Pb-Free Temp. Range Package MIC2145BMM MIC2145YMM Adj ?40?C to +85?C 8-lead MSOP MIC2145BML MIC2145YML Adj ?40?C to +85?C 10-lead MLF? Typical Application L1 10V Output V IN Efficiency 3.0V to 5.0V 10?H 90 D1 C IN 15 V OUT 10?F/6.3V 85 EN SW 10V/150mA 4 6 80 PGND VDD COUT MIC2145BMM 10?F/16V 75 3 7 FB RSET 70 2 8 SS SGND 65 V = 3.0V IN 60 I Limit 10 100 1000 OUTPUT CURRENT (mA) Adjustable Output Boost Converter with Programmable Peak Switch Current MLF and MicroLeadFrame are trademarks of Amkor Technologies, Inc. Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com April 2005 1 M9999-042205 EFFICIENCY (%)MIC2145 Micrel, Inc. Pin Configuration EN 1 10 SGND EN 1 8 SGND SS 2 FB 9 SS 2 7 FB RSET 3 8 VDD RSET 3 6 VDD PGND 4 7 SW 56 PGND SW PGND 4 5 SW 3mm?????3mm MLF-10L (ML) 8-Lead MSOP (MM) Pin Description Pin Number Pin Number Pin Name Pin Function MSOP MLF 11 EN Enable (Input): Logic high (?1.5V) enables regulator. Logic low ( ?0.7V) shuts down regulator. Do not float. 22 SS Soft Start Capacitor (External Component): Connect external capacitor to ground to control the rise time of the output voltage. 33 RSET Current Limit (External Component): Sets peak current limit of the internal power MOSFET using an external resistor. 4 4, 5 PGND Power Ground (Return): Internal power MOSFET source. 5 6, 7 SW Switch Node (Input): Internal power MOSFET drain. 68 VDD Supply (Input): +2.4V to +16V for internal circuitry. 79 FB Feedback (Input): Output voltage sense node. 810 SGND Small Signal Ground (Return): Ground M9999-042205 2 April 2005MIC2145 Micrel, Inc. MIC2145 High Efficiency 2.5W Boost Converter General Description Features The MIC2145 is a small size boost switching regulator that ?2.4V to 16V input voltage can provide over 2.5W of output power. The input voltage ? Output adjustable to 16V range is between 2.4V to 16V, making the device suitable for ?Programmable peak current limit one-cell Li-Ion and 3- to 4-cell alkaline/NiCad/NiMH applica- ? Soft start tions. The output voltage of the MIC2145 can be adjusted up ? Up to 450kHz switching frequency to 16V. ?0.5?A shutdown current ? 200?A quiescent current The MIC2145 is well suited for portable, space-sensitive ? Capable of 5V/ 500mA output with 3.3V input applications. Its typical 450kHz operation allows small sur- ? Achieves over 85% efficiency face mount external components to be used. The MIC2145 ?Implements low power BOOST, SEPIC, and FLYBACK has a low quiescent current of 200?A, and a typical shutdown topologies current of 0.5?A. The MIC2145 is capable of high efficiencies ? MSOP-8 and 3mm?3mm MLF?-10L in a small board area. Applications The MIC2145 features a low-on resistance internal switch that allows it to provide over 2.5W of output power. The peak ?Flash LED driver switch current can be programmed through an external ? LCD bias supply resistor. This allows the user to set the peak switch current at ? White LED driver the level where maximum efficiency occurs. It also allows the ? DSL bias supply user to further optimize for efficiency and inductor size by ? Local 3V to 5V conversion setting the peak current below the level of inductor saturation. The MIC2145 is available in an MSOP-8 and 3mm?3mm MLF?-10L package with an ambient operating temperature range from ?40?C to +85?C. Ordering Information Part Number Voltage Ambient Standard Pb-Free Temp. Range Package MIC2145BMM MIC2145YMM Adj ?40?C to +85?C 8-lead MSOP MIC2145BML MIC2145YML Adj ?40?C to +85?C 10-lead MLF? Typical Application L1 10V Output V IN Efficiency 3.0V to 5.0V 10?H 90 D1 C IN 15 V OUT 10?F/6.3V 85 EN SW 10V/150mA 4 6 80 PGND VDD COUT MIC2145BMM 10?F/16V 75 3 7 FB RSET 70 2 8 SS SGND 65 V = 3.0V IN 60 I Limit 10 100 1000 OUTPUT CURRENT (mA) Adjustable Output Boost Converter with Programmable Peak Switch Current MLF and MicroLeadFrame are trademarks of Amkor Technologies, Inc. Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com April 2005 1 M9999-042205 EFFICIENCY (%)MIC2145 Micrel, Inc. MIC2145 High Efficiency 2.5W Boost Converter General Description Features The MIC2145 is a small size boost switching regulator that ?2.4V to 16V input voltage can provide over 2.5W of output power. The input voltage ? Output adjustable to 16V range is between 2.4V to 16V, making the device suitable for ?Programmable peak current limit one-cell Li-Ion and 3- to 4-cell alkaline/NiCad/NiMH applica- ? Soft start tions. The output voltage of the MIC2145 can be adjusted up ? Up to 450kHz switching frequency to 16V. ?0.5?A shutdown current ? 200?A quiescent current The MIC2145 is well suited for portable, space-sensitive ? Capable of 5V/ 500mA output with 3.3V input applications. Its typical 450kHz operation allows small sur- ? Achieves over 85% efficiency face mount external components to be used. The MIC2145 ?Implements low power BOOST, SEPIC, and FLYBACK has a low quiescent current of 200?A, and a typical shutdown topologies current of 0.5?A. The MIC2145 is capable of high efficiencies ? MSOP-8 and 3mm?3mm MLF?-10L in a small board area. Applications The MIC2145 features a low-on resistance internal switch that allows it to provide over 2.5W of output power. The peak ?Flash LED driver switch current can be programmed through an external ? LCD bias supply resistor. This allows the user to set the peak switch current at ? White LED driver the level where maximum efficiency occurs. It also allows the ? DSL bias supply user to further optimize for efficiency and inductor size by ? Local 3V to 5V conversion setting the peak current below the level of inductor saturation. The MIC2145 is available in an MSOP-8 and 3mm?3mm MLF?-10L package with an ambient operating temperature range from ?40?C to +85?C. Ordering Information Part Number Voltage Ambient Standard Pb-Free Temp. Range Package MIC2145BMM MIC2145YMM Adj ?40?C to +85?C 8-lead MSOP MIC2145BML MIC2145YML Adj ?40?C to +85?C 10-lead MLF? Typical Application L1 10V Output V IN Efficiency 3.0V to 5.0V 10?H 90 D1 C IN 15 V OUT 10?F/6.3V 85 EN SW 10V/150mA 4 6 80 PGND VDD COUT MIC2145BMM 10?F/16V 75 3 7 FB RSET 70 2 8 SS SGND 65 V = 3.0V IN 60 I Limit 10 100 1000 OUTPUT CURRENT (mA) Adjustable Output Boost Converter with Programmable Peak Switch Current MLF and MicroLeadFrame are trademarks of Amkor Technologies, Inc. Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com April 2005 1 M9999-042205 EFFICIENCY (%)MIC2145 Micrel, Inc. Pin Configuration EN 1 10 SGND EN 1 8 SGND SS 2 FB 9 SS 2 7 FB RSET 3 8 VDD RSET 3 6 VDD PGND 4 7 SW 56 PGND SW PGND 4 5 SW 3mm?????3mm MLF-10L (ML) 8-Lead MSOP (MM) Pin Description Pin Number Pin Number Pin Name Pin Function MSOP MLF 11 EN Enable (Input): Logic high (=1.5V) enables regulator. Logic low ( =0.7V) shuts down regulator. Do not float. 22 SS Soft Start Capacitor (External Component): Connect external capacitor to ground to control the rise time of the output voltage. 33 RSET Current Limit (External Component): Sets peak current limit of the internal power MOSFET using an external resistor. 4 4, 5 PGND Power Ground (Return): Internal power MOSFET source. 5 6, 7 SW Switch Node (Input): Internal power MOSFET drain. 68 VDD Supply (Input): +2.4V to +16V for internal circuitry. 79 FB Feedback (Input): Output voltage sense node. 810 SGND Small Signal Ground (Return): Ground M9999-042205 2 April 2005MIC2145 Micrel, Inc. Absolute Maximum Ratings (Note 1) Operating Ratings (Note 2) Supply Voltage (V ) .................................................... 18V Supply Voltage (V ) ....................................... 2.4V to 16V DD DD Switch Voltage (V ) .................................................... 18V Switch Voltage (V ) .................................................... 16V SW SW Feedback Voltage (V ) ................................................ 18V Ambient Temperature (T ) ......................... ?40?C to +85?C FB A Switch Current (I ) ........................................................ 2A Junction Temperature (T ) ....................... ?40?C to +125?C SW J Enable Voltage(V ), Note 5 ........................................18V Package Thermal Resistance MSOP EN ? (MSOP-8) .................................................... 206?C/W RSET Voltage (V ) .................................................... 6V JA RSET ? (3mm?3mm MLF-10) .................................... 60?C/W JA ESD Rating, Note 3 ...................................................... 2kV Ambient Storage Temperature(T ) .......... ?65?C to +150?C S Electrical Characteristics (Note 6) V = 10V, V = 10V, I = 100mA; T =25?C, unless otherwise noted, bold values indicate ?40?C ? T ? 125?C. DD OUT OUT J J Parameter Condition Min Typ Max Units Supply Voltage 2.4 16 V Shutdown Current EN = 0.3V, V = 10V, V =1.35V 0.5 5 ?A DD FB Quiescent Current EN = V , V = 10V, V = 1.35V 200 300 ?A DD DD FB Feedback Voltage Reference (?2%) 1.058 1.08 1.102 V (?3%) 1.048 1.112 V Comparator Hysteresis 18 mV Feedback Input Current V =1.35V 40 nA FB Peak Current Limit R =200?, V = 3.6V, Note 4 0.8 A SET DD R =1k?, V = 10V, Note 4 0.9 A SET DD Current Limit Comparator 500 ns Propagation Delay Switch On-Resistance I = 150mA, V = 3.0V 500 750 m ? SW DD I = 1.2A, V = 10V 250 400 m ? SW DD Maximum Off Time 1000 ns Enable Input Voltage Logic Low (turn-off) 1.1 0.7 V Logic High (turn-on) 1.5 1.1 V Enable Input Current V = 0V ?1 0.01 1 ?A EN V = 2V ?1 0.01 1 ?A EN Soft Start Current V = 2V, V =3.0V ?8 ?12 ?16 ?A EN DD Note 1. Exceeding the absolute maximum rating may damage the device. Note 2. The device is not guaranteed to function outside its operating rating. Note 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5K ? in series with 100pF. Note 4. The current is measured in a DC mode. Actual peak switching current will be higher due to internal propagation delay of the circuit. Note 5. V ? V . EN DD Note 6. Specification for packaged product only. April 2005 3 M9999-042205MIC2145 Micrel, Inc. MIC2145 High Efficiency 2.5W Boost Converter General Description Features The MIC2145 is a small size boost switching regulator that ?2.4V to 16V input voltage can provide over 2.5W of output power. The input voltage ? Output adjustable to 16V range is between 2.4V to 16V, making the device suitable for ?Programmable peak current limit one-cell Li-Ion and 3- to 4-cell alkaline/NiCad/NiMH applica- ? Soft start tions. The output voltage of the MIC2145 can be adjusted up ? Up to 450kHz switching frequency to 16V. ?0.5?A shutdown current ? 200?A quiescent current The MIC2145 is well suited for portable, space-sensitive ? Capable of 5V/ 500mA output with 3.3V input applications. Its typical 450kHz operation allows small sur- ? Achieves over 85% efficiency face mount external components to be used. The MIC2145 ?Implements low power BOOST, SEPIC, and FLYBACK has a low quiescent current of 200?A, and a typical shutdown topologies current of 0.5?A. The MIC2145 is capable of high efficiencies ? MSOP-8 and 3mm?3mm MLF?-10L in a small board area. Applications The MIC2145 features a low-on resistance internal switch that allows it to provide over 2.5W of output power. The peak ?Flash LED driver switch current can be programmed through an external ? LCD bias supply resistor. This allows the user to set the peak switch current at ? White LED driver the level where maximum efficiency occurs. It also allows the ? DSL bias supply user to further optimize for efficiency and inductor size by ? Local 3V to 5V conversion setting the peak current below the level of inductor saturation. The MIC2145 is available in an MSOP-8 and 3mm?3mm MLF?-10L package with an ambient operating temperature range from ?40?C to +85?C. Ordering Information Part Number Voltage Ambient Standard Pb-Free Temp. Range Package MIC2145BMM MIC2145YMM Adj ?40?C to +85?C 8-lead MSOP MIC2145BML MIC2145YML Adj ?40?C to +85?C 10-lead MLF? Typical Application L1 10V Output V IN Efficiency 3.0V to 5.0V 10?H 90 D1 C IN 15 V OUT 10?F/6.3V 85 EN SW 10V/150mA 4 6 80 PGND VDD COUT MIC2145BMM 10?F/16V 75 3 7 FB RSET 70 2 8 SS SGND 65 V = 3.0V IN 60 I Limit 10 100 1000 OUTPUT CURRENT (mA) Adjustable Output Boost Converter with Programmable Peak Switch Current MLF and MicroLeadFrame are trademarks of Amkor Technologies, Inc. Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com April 2005 1 M9999-042205 EFFICIENCY (%)MIC2145 Micrel, Inc. MIC2145 High Efficiency 2.5W Boost Converter General Description Features The MIC2145 is a small size boost switching regulator that ?2.4V to 16V input voltage can provide over 2.5W of output power. The input voltage ? Output adjustable to 16V range is between 2.4V to 16V, making the device suitable for ?Programmable peak current limit one-cell Li-Ion and 3- to 4-cell alkaline/NiCad/NiMH applica- ? Soft start tions. The output voltage of the MIC2145 can be adjusted up ? Up to 450kHz switching frequency to 16V. ?0.5?A shutdown current ? 200?A quiescent current The MIC2145 is well suited for portable, space-sensitive ? Capable of 5V/ 500mA output with 3.3V input applications. Its typical 450kHz operation allows small sur- ? Achieves over 85% efficiency face mount external components to be used. The MIC2145 ?Implements low power BOOST, SEPIC, and FLYBACK has a low quiescent current of 200?A, and a typical shutdown topologies current of 0.5?A. The MIC2145 is capable of high efficiencies ? MSOP-8 and 3mm?3mm MLF?-10L in a small board area. Applications The MIC2145 features a low-on resistance internal switch that allows it to provide over 2.5W of output power. The peak ?Flash LED driver switch current can be programmed through an external ? LCD bias supply resistor. This allows the user to set the peak switch current at ? White LED driver the level where maximum efficiency occurs. It also allows the ? DSL bias supply user to further optimize for efficiency and inductor size by ? Local 3V to 5V conversion setting the peak current below the level of inductor saturation. The MIC2145 is available in an MSOP-8 and 3mm?3mm MLF?-10L package with an ambient operating temperature range from ?40?C to +85?C. Ordering Information Part Number Voltage Ambient Standard Pb-Free Temp. Range Package MIC2145BMM MIC2145YMM Adj ?40?C to +85?C 8-lead MSOP MIC2145BML MIC2145YML Adj ?40?C to +85?C 10-lead MLF? Typical Application L1 10V Output V IN Efficiency 3.0V to 5.0V 10?H 90 D1 C IN 15 V OUT 10?F/6.3V 85 EN SW 10V/150mA 4 6 80 PGND VDD COUT MIC2145BMM 10?F/16V 75 3 7 FB RSET 70 2 8 SS SGND 65 V = 3.0V IN 60 I Limit 10 100 1000 OUTPUT CURRENT (mA) Adjustable Output Boost Converter with Programmable Peak Switch Current MLF and MicroLeadFrame are trademarks of Amkor Technologies, Inc. Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com April 2005 1 M9999-042205 EFFICIENCY (%)MIC2145 Micrel, Inc. Pin Configuration EN 1 10 SGND EN 1 8 SGND SS 2 FB 9 SS 2 7 FB RSET 3 8 VDD RSET 3 6 VDD PGND 4 7 SW 56 PGND SW PGND 4 5 SW 3mm?????3mm MLF-10L (ML) 8-Lead MSOP (MM) Pin Description Pin Number Pin Number Pin Name Pin Function MSOP MLF 11 EN Enable (Input): Logic high (=1.5V) enables regulator. Logic low ( =0.7V) shuts down regulator. Do not float. 22 SS Soft Start Capacitor (External Component): Connect external capacitor to ground to control the rise time of the output voltage. 33 RSET Current Limit (External Component): Sets peak current limit of the internal power MOSFET using an external resistor. 4 4, 5 PGND Power Ground (Return): Internal power MOSFET source. 5 6, 7 SW Switch Node (Input): Internal power MOSFET drain. 68 VDD Supply (Input): +2.4V to +16V for internal circuitry. 79 FB Feedback (Input): Output voltage sense node. 810 SGND Small Signal Ground (Return): Ground M9999-042205 2 April 2005MIC2145 Micrel, Inc. MIC2145 High Efficiency 2.5W Boost Converter General Description Features The MIC2145 is a small size boost switching regulator that ?2.4V to 16V input voltage can provide over 2.5W of output power. The input voltage ? Output adjustable to 16V range is between 2.4V to 16V, making the device suitable for ?Programmable peak current limit one-cell Li-Ion and 3- to 4-cell alkaline/NiCad/NiMH applica- ? Soft start tions. The output voltage of the MIC2145 can be adjusted up ? Up to 450kHz switching frequency to 16V. ?0.5?A shutdown current ? 200?A quiescent current The MIC2145 is well suited for portable, space-sensitive ? Capable of 5V/ 500mA output with 3.3V input applications. Its typical 450kHz operation allows small sur- ? Achieves over 85% efficiency face mount external components to be used. The MIC2145 ?Implements low power BOOST, SEPIC, and FLYBACK has a low quiescent current of 200?A, and a typical shutdown topologies current of 0.5?A. The MIC2145 is capable of high efficiencies ? MSOP-8 and 3mm?3mm MLF?-10L in a small board area. Applications The MIC2145 features a low-on resistance internal switch that allows it to provide over 2.5W of output power. The peak ?Flash LED driver switch current can be programmed through an external ? LCD bias supply resistor. This allows the user to set the peak switch current at ? White LED driver the level where maximum efficiency occurs. It also allows the ? DSL bias supply user to further optimize for efficiency and inductor size by ? Local 3V to 5V conversion setting the peak current below the level of inductor saturation. The MIC2145 is available in an MSOP-8 and 3mm?3mm MLF?-10L package with an ambient operating temperature range from ?40?C to +85?C. Ordering Information Part Number Voltage Ambient Standard Pb-Free Temp. Range Package MIC2145BMM MIC2145YMM Adj ?40?C to +85?C 8-lead MSOP MIC2145BML MIC2145YML Adj ?40?C to +85?C 10-lead MLF? Typical Application L1 10V Output V IN Efficiency 3.0V to 5.0V 10?H 90 D1 C IN 15 V OUT 10?F/6.3V 85 EN SW 10V/150mA 4 6 80 PGND VDD COUT MIC2145BMM 10?F/16V 75 3 7 FB RSET 70 2 8 SS SGND 65 V = 3.0V IN 60 I Limit 10 100 1000 OUTPUT CURRENT (mA) Adjustable Output Boost Converter with Programmable Peak Switch Current MLF and MicroLeadFrame are trademarks of Amkor Technologies, Inc. Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com April 2005 1 M9999-042205 EFFICIENCY (%)MIC2145 Micrel, Inc. MIC2145 High Efficiency 2.5W Boost Converter General Description Features The MIC2145 is a small size boost switching regulator that ?2.4V to 16V input voltage can provide over 2.5W of output power. The input voltage ? Output adjustable to 16V range is between 2.4V to 16V, making the device suitable for ?Programmable peak current limit one-cell Li-Ion and 3- to 4-cell alkaline/NiCad/NiMH applica- ? Soft start tions. The output voltage of the MIC2145 can be adjusted up ? Up to 450kHz switching frequency to 16V. ?0.5?A shutdown current ? 200?A quiescent current The MIC2145 is well suited for portable, space-sensitive ? Capable of 5V/ 500mA output with 3.3V input applications. Its typical 450kHz operation allows small sur- ? Achieves over 85% efficiency face mount external components to be used. The MIC2145 ?Implements low power BOOST, SEPIC, and FLYBACK has a low quiescent current of 200?A, and a typical shutdown topologies current of 0.5?A. The MIC2145 is capable of high efficiencies ? MSOP-8 and 3mm?3mm MLF?-10L in a small board area. Applications The MIC2145 features a low-on resistance internal switch that allows it to provide over 2.5W of output power. The peak ?Flash LED driver switch current can be programmed through an external ? LCD bias supply resistor. This allows the user to set the peak switch current at ? White LED driver the level where maximum efficiency occurs. It also allows the ? DSL bias supply user to further optimize for efficiency and inductor size by ? Local 3V to 5V conversion setting the peak current below the level of inductor saturation. The MIC2145 is available in an MSOP-8 and 3mm?3mm MLF?-10L package with an ambient operating temperature range from ?40?C to +85?C. Ordering Information Part Number Voltage Ambient Standard Pb-Free Temp. Range Package MIC2145BMM MIC2145YMM Adj ?40?C to +85?C 8-lead MSOP MIC2145BML MIC2145YML Adj ?40?C to +85?C 10-lead MLF? Typical Application L1 10V Output V IN Efficiency 3.0V to 5.0V 10?H 90 D1 C IN 15 V OUT 10?F/6.3V 85 EN SW 10V/150mA 4 6 80 PGND VDD COUT MIC2145BMM 10?F/16V 75 3 7 FB RSET 70 2 8 SS SGND 65 V = 3.0V IN 60 I Limit 10 100 1000 OUTPUT CURRENT (mA) Adjustable Output Boost Converter with Programmable Peak Switch Current MLF and MicroLeadFrame are trademarks of Amkor Technologies, Inc. Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com April 2005 1 M9999-042205 EFFICIENCY (%)MIC2145 Micrel, Inc. Pin Configuration EN 1 10 SGND EN 1 8 SGND SS 2 FB 9 SS 2 7 FB RSET 3 8 VDD RSET 3 6 VDD PGND 4 7 SW 56 PGND SW PGND 4 5 SW 3mm?????3mm MLF-10L (ML) 8-Lead MSOP (MM) Pin Description Pin Number Pin Number Pin Name Pin Function MSOP MLF 11 EN Enable (Input): Logic high (=1.5V) enables regulator. Logic low ( =0.7V) shuts down regulator. Do not float. 22 SS Soft Start Capacitor (External Component): Connect external capacitor to ground to control the rise time of the output voltage. 33 RSET Current Limit (External Component): Sets peak current limit of the internal power MOSFET using an external resistor. 4 4, 5 PGND Power Ground (Return): Internal power MOSFET source. 5 6, 7 SW Switch Node (Input): Internal power MOSFET drain. 68 VDD Supply (Input): +2.4V to +16V for internal circuitry. 79 FB Feedback (Input): Output voltage sense node. 810 SGND Small Signal Ground (Return): Ground M9999-042205 2 April 2005MIC2145 Micrel, Inc. Absolute Maximum Ratings (Note 1) Operating Ratings (Note 2) Supply Voltage (V ) .................................................... 18V Supply Voltage (V ) ....................................... 2.4V to 16V DD DD Switch Voltage (V ) .................................................... 18V Switch Voltage (V ) .................................................... 16V SW SW Feedback Voltage (V ) ................................................ 18V Ambient Temperature (T ) ......................... ?40?C to +85?C FB A Switch Current (I ) ........................................................ 2A Junction Temperature (T ) ....................... ?40?C to +125?C SW J Enable Voltage(V ), Note 5 ........................................18V Package Thermal Resistance MSOP EN ? (MSOP-8) .................................................... 206?C/W RSET Voltage (V ) .................................................... 6V JA RSET ? (3mm?3mm MLF-10) .................................... 60?C/W JA ESD Rating, Note 3 ...................................................... 2kV Ambient Storage Temperature(T ) .......... ?65?C to +150?C S Electrical Characteristics (Note 6) V = 10V, V = 10V, I = 100mA; T =25?C, unless otherwise noted, bold values indicate ?40?C = T = 125?C. DD OUT OUT J J Parameter Condition Min Typ Max Units Supply Voltage 2.4 16 V Shutdown Current EN = 0.3V, V = 10V, V =1.35V 0.5 5 ?A DD FB Quiescent Current EN = V , V = 10V, V = 1.35V 200 300 ?A DD DD FB Feedback Voltage Reference (?2%) 1.058 1.08 1.102 V (?3%) 1.048 1.112 V Comparator Hysteresis 18 mV Feedback Input Current V =1.35V 40 nA FB Peak Current Limit R =200?, V = 3.6V, Note 4 0.8 A SET DD R =1k?, V = 10V, Note 4 0.9 A SET DD Current Limit Comparator 500 ns Propagation Delay Switch On-Resistance I = 150mA, V = 3.0V 500 750 m ? SW DD I = 1.2A, V = 10V 250 400 m ? SW DD Maximum Off Time 1000 ns Enable Input Voltage Logic Low (turn-off) 1.1 0.7 V Logic High (turn-on) 1.5 1.1 V Enable Input Current V = 0V ?1 0.01 1 ?A EN V = 2V ?1 0.01 1 ?A EN Soft Start Current V = 2V, V =3.0V ?8 ?12 ?16 ?A EN DD Note 1. Exceeding the absolute maximum rating may damage the device. Note 2. The device is not guaranteed to function outside its operating rating. Note 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5K ? in series with 100pF. Note 4. The current is measured in a DC mode. Actual peak switching current will be higher due to internal propagation delay of the circuit. Note 5. V = V . EN DD Note 6. Specification for packaged product only. April 2005 3 M9999-042205

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