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LT3500EDD#PBF

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Datasheet
Switching Voltage Regulators 36V (40V Transient), 2.2MHz Step-Down Switching Regulator
Manufacturer: Analog Devices



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LT3500EDD#PBF
Analog Devices

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10 : $ 7.5451
25 : $ 7.056
100 : $ 6.4741
250 : $ 6.3446

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131 - Global Stock


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MOQ : 1
Multiples : 1

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LT3500EDD#PBF
Analog Devices

1 : $ 12.971
10 : $ 9.0024
25 : $ 8.8532
100 : $ 7.9414
250 : $ 7.8418
500 : $ 7.444
1000 : $ 6.9798
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Manufacturer
Analog Devices
Product Category
Switching Voltage Regulators
RoHS - XON
Y Icon ROHS
Mounting Style
Smd/Smt
Output Voltage
Adj
Output Current
2 A
Number of Outputs
2 Output
Input Voltage MAX
36 V
Topology
Buck
Input Voltage MIN
3 V
Switching Frequency
250 Khz To 2.2 Mhz
Minimum Operating Temperature
- 40 C
Maximum Operating Temperature
+125 C
Series
Lt3500
Packaging
Tube
Input Voltage
3 v to 36 V
Operating Temperature Range
- 40 C to +125 C
Package / Case
DFN-12
Quiescent Current
2.5 mA
Type
Dc/Dc Converter
Brand
Analog Devices
Shutdown
Shutdown
Operating Supply Current
2.5 mA
Product Type
Switching Voltage Regulators
Factory Pack Quantity :
121
Subcategory
Pmic - Power Management Ics
Supply Voltage - Min
3 V
Cnhts
8542390000
Hts Code
8542390001
Mxhts
85423901
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LT3500 Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller FEATURES DESCRIPTION ? n Wide Input Range: 3V to 36V Operating, The LT 3500 is a current mode PWM step-down DC/DC 40V Maximum converter with an internal 2.3A switch. The wide input range n Short-Circuit Protected Over Full Input Range of 3V to 40V makes the LT3500 suitable for regulating n 2A Output Current Capability power from a wide variety of sources, including automo- n Adjustable/Synchronizable Fixed Frequency tive batteries, 24V industrial supplies and unregulated Operation from 250kHz to 2.2MHz wall adapters. n Soft-Start/Tracking Capability Resistor-programmable 250kHz to 2.2MHz frequency n Output Adjustable Down to 0.8V range and synchronization capability enable optimization n Adjustable Linear Regulator/Driver with 13mA between ef? ciency and external component size. Cycle- Output Capability by-cycle current limit, frequency foldback and thermal n Power Good Comparator with Complimentary shutdown provide protection against a shorted output. Outputs The soft-start feature controls the ramp rate of the output n Low Shutdown Current: 12?A voltage, eliminating input current surge during start-up, n Thermally Enhanced 3mm ? 3mm DFN or 16-Pin and also provides output tracking. MSOP Package The LT3500 contains an internal NPN transistor with feed- APPLICATIONS back control which can be con? gured as a linear regulator or as a linear regulator controller. n Automotive Battery Regulation n Industrial Control The LT3500?s low current shutdown mode (<12?A) enables n Wall Transformer Regulation easy power management in battery-powered systems. n Distributed Power Regulation L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Dual Step-Down Converters Switching Converter Ef? ciency Output Voltage Ripple 90 V IN V BST IN 6V TO 36V 85 0.47?F 2.2?F LT3500 6.8?H V OUT1 80 V = 5V AT 1A OUT1 SW 5V AC COUPLED 1A B240A SHDN 75 2mV/DIV 42.2k SS 22?F 70 0.47?F FB PG 8.06k 65 PG V = 3.3V AT 1A OUT2 AC COUPLED 60 R SYNC LDRV 2mV/DIV T/ V = 12V IN V 55 53.6k C I = 0A 1k OUT2 V 330pF 24.9k OUT2 FREQUENCY = 800kHz 50 LFB 3.3V 3500 TA01c 500ns/DIV 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 40.2k 1A 8.06k 22?F LOAD CURRENT (A) 3500 TA01b 3500 TA01a 3500fc 1 EFFICIENCY (%)LT3500 Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller FEATURES DESCRIPTION ? n Wide Input Range: 3V to 36V Operating, The LT 3500 is a current mode PWM step-down DC/DC 40V Maximum converter with an internal 2.3A switch. The wide input range n Short-Circuit Protected Over Full Input Range of 3V to 40V makes the LT3500 suitable for regulating n 2A Output Current Capability power from a wide variety of sources, including automo- n Adjustable/Synchronizable Fixed Frequency tive batteries, 24V industrial supplies and unregulated Operation from 250kHz to 2.2MHz wall adapters. n Soft-Start/Tracking Capability Resistor-programmable 250kHz to 2.2MHz frequency n Output Adjustable Down to 0.8V range and synchronization capability enable optimization n Adjustable Linear Regulator/Driver with 13mA between ef? ciency and external component size. Cycle- Output Capability by-cycle current limit, frequency foldback and thermal n Power Good Comparator with Complimentary shutdown provide protection against a shorted output. Outputs The soft-start feature controls the ramp rate of the output n Low Shutdown Current: 12?A voltage, eliminating input current surge during start-up, n Thermally Enhanced 3mm ? 3mm DFN or 16-Pin and also provides output tracking. MSOP Package The LT3500 contains an internal NPN transistor with feed- APPLICATIONS back control which can be con? gured as a linear regulator or as a linear regulator controller. n Automotive Battery Regulation n Industrial Control The LT3500?s low current shutdown mode (<12?A) enables n Wall Transformer Regulation easy power management in battery-powered systems. n Distributed Power Regulation L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Dual Step-Down Converters Switching Converter Ef? ciency Output Voltage Ripple 90 V IN V BST IN 6V TO 36V 85 0.47?F 2.2?F LT3500 6.8?H V OUT1 80 V = 5V AT 1A OUT1 SW 5V AC COUPLED 1A B240A SHDN 75 2mV/DIV 42.2k SS 22?F 70 0.47?F FB PG 8.06k 65 PG V = 3.3V AT 1A OUT2 AC COUPLED 60 R SYNC LDRV 2mV/DIV T/ V = 12V IN V 55 53.6k C I = 0A 1k OUT2 V 330pF 24.9k OUT2 FREQUENCY = 800kHz 50 LFB 3.3V 3500 TA01c 500ns/DIV 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 40.2k 1A 8.06k 22?F LOAD CURRENT (A) 3500 TA01b 3500 TA01a 3500fc 1 EFFICIENCY (%)LT3500 (Note 1) ABSOLUTE MAXIMUM RATINGS V , PG, PG Operating .................................... 40V/?0.3V Operating Junction Temperature Range IN SW ............................................................................. V LT3500EDD (Note 2) .......................... ?40?C to 125?C IN BST ................................................................ 55V/?0.3V LT3500IDD (Note 2) ........................... ?40?C to 125?C BST Pin Above SW ....................................................25V LT3500HDD (Note 2).......................... ?40?C to 150?C LDRV, SHDN ..............................................................15V LT3500EMSE (Note 2)........................ ?40?C to 125?C FB, LFB, R /SYNC .......................................................5V LT3500IMSE (Note 3) ........................ ?40?C to 125?C T SS, V ......................................................................2.5V LT3500HMSE (Note 2) ....................... ?40?C to 150?C C Storage Temperature Range ................... ?65?C to 150?C PIN CONFIGURATION TOP VIEW TOP VIEW V 1 12 SW 1 IN NC1 16 NC16 V 2 15 SW 2 11 BST IN SHDN 3 SHDN 14 BST 3 LDRV SS 10 SS 4 13 LDRV 13 17 5 PG 12 LFB 4 LFB PG 9 V 6 11 FB C 5 FB V 8 C 7 R /SYNC 10 PG T NC8 8 9 NC9 6 7 R /SYNC PG T MSE PACKAGE DD PACKAGE 16-LEAD PLASTIC MSE 12-LEAD (3mm ? 3mm) PLASTIC DFN ? = 45?C/W, ? = 10?C/W JA JC(PAD) ? = 45?C/W, ? = 10?C/W JA JC(PAD) EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3500EDD#PBF LT3500EDD#TRPBF LCRN 12-Lead (3mm ? 3mm) Plastic DFN ?40?C to 125?C LT3500IDD#PBF LT3500IDD#TRPBF LCRN 12-Lead (3mm ? 3mm) Plastic DFN ?40?C to 125?C LT3500HDD#PBF LT3500HDD#TRPBF LDCY 12-Lead (3mm ? 3mm) Plastic DFN ?40?C to 150?C LT3500EMSE#PBF LT3500EMSE#TRPBF 3500 16-Lead Plastic MSE ?40?C to 125?C LT3500IMSE#PBF LT3500IMSE#TRPBF 3500 16-Lead Plastic MSE ?40?C to 125?C LT3500HMSE#PBF LT3500HMSE#TRPBF 3500 16-Lead Plastic MSE ?40?C to 150?C Consult LTC Marketing for parts speci? ed with wider operating temperature ranges. *The temperature grade is identi? ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based ? nish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel speci? cations, go to: http://www.linear.com/tapeandreel/ 3500fc 2LT3500 Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller FEATURES DESCRIPTION ? n Wide Input Range: 3V to 36V Operating, The LT 3500 is a current mode PWM step-down DC/DC 40V Maximum converter with an internal 2.3A switch. The wide input range n Short-Circuit Protected Over Full Input Range of 3V to 40V makes the LT3500 suitable for regulating n 2A Output Current Capability power from a wide variety of sources, including automo- n Adjustable/Synchronizable Fixed Frequency tive batteries, 24V industrial supplies and unregulated Operation from 250kHz to 2.2MHz wall adapters. n Soft-Start/Tracking Capability Resistor-programmable 250kHz to 2.2MHz frequency n Output Adjustable Down to 0.8V range and synchronization capability enable optimization n Adjustable Linear Regulator/Driver with 13mA between ef? ciency and external component size. Cycle- Output Capability by-cycle current limit, frequency foldback and thermal n Power Good Comparator with Complimentary shutdown provide protection against a shorted output. Outputs The soft-start feature controls the ramp rate of the output n Low Shutdown Current: 12?A voltage, eliminating input current surge during start-up, n Thermally Enhanced 3mm ? 3mm DFN or 16-Pin and also provides output tracking. MSOP Package The LT3500 contains an internal NPN transistor with feed- APPLICATIONS back control which can be con? gured as a linear regulator or as a linear regulator controller. n Automotive Battery Regulation n Industrial Control The LT3500?s low current shutdown mode (<12?A) enables n Wall Transformer Regulation easy power management in battery-powered systems. n Distributed Power Regulation L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Dual Step-Down Converters Switching Converter Ef? ciency Output Voltage Ripple 90 V IN V BST IN 6V TO 36V 85 0.47?F 2.2?F LT3500 6.8?H V OUT1 80 V = 5V AT 1A OUT1 SW 5V AC COUPLED 1A B240A SHDN 75 2mV/DIV 42.2k SS 22?F 70 0.47?F FB PG 8.06k 65 PG V = 3.3V AT 1A OUT2 AC COUPLED 60 R SYNC LDRV 2mV/DIV T/ V = 12V IN V 55 53.6k C I = 0A 1k OUT2 V 330pF 24.9k OUT2 FREQUENCY = 800kHz 50 LFB 3.3V 3500 TA01c 500ns/DIV 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 40.2k 1A 8.06k 22?F LOAD CURRENT (A) 3500 TA01b 3500 TA01a 3500fc 1 EFFICIENCY (%)LT3500 Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller FEATURES DESCRIPTION ? n Wide Input Range: 3V to 36V Operating, The LT 3500 is a current mode PWM step-down DC/DC 40V Maximum converter with an internal 2.3A switch. The wide input range n Short-Circuit Protected Over Full Input Range of 3V to 40V makes the LT3500 suitable for regulating n 2A Output Current Capability power from a wide variety of sources, including automo- n Adjustable/Synchronizable Fixed Frequency tive batteries, 24V industrial supplies and unregulated Operation from 250kHz to 2.2MHz wall adapters. n Soft-Start/Tracking Capability Resistor-programmable 250kHz to 2.2MHz frequency n Output Adjustable Down to 0.8V range and synchronization capability enable optimization n Adjustable Linear Regulator/Driver with 13mA between ef? ciency and external component size. Cycle- Output Capability by-cycle current limit, frequency foldback and thermal n Power Good Comparator with Complimentary shutdown provide protection against a shorted output. Outputs The soft-start feature controls the ramp rate of the output n Low Shutdown Current: 12?A voltage, eliminating input current surge during start-up, n Thermally Enhanced 3mm ? 3mm DFN or 16-Pin and also provides output tracking. MSOP Package The LT3500 contains an internal NPN transistor with feed- APPLICATIONS back control which can be con? gured as a linear regulator or as a linear regulator controller. n Automotive Battery Regulation n Industrial Control The LT3500?s low current shutdown mode (<12?A) enables n Wall Transformer Regulation easy power management in battery-powered systems. n Distributed Power Regulation L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Dual Step-Down Converters Switching Converter Ef? ciency Output Voltage Ripple 90 V IN V BST IN 6V TO 36V 85 0.47?F 2.2?F LT3500 6.8?H V OUT1 80 V = 5V AT 1A OUT1 SW 5V AC COUPLED 1A B240A SHDN 75 2mV/DIV 42.2k SS 22?F 70 0.47?F FB PG 8.06k 65 PG V = 3.3V AT 1A OUT2 AC COUPLED 60 R SYNC LDRV 2mV/DIV T/ V = 12V IN V 55 53.6k C I = 0A 1k OUT2 V 330pF 24.9k OUT2 FREQUENCY = 800kHz 50 LFB 3.3V 3500 TA01c 500ns/DIV 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 40.2k 1A 8.06k 22?F LOAD CURRENT (A) 3500 TA01b 3500 TA01a 3500fc 1 EFFICIENCY (%)LT3500 (Note 1) ABSOLUTE MAXIMUM RATINGS V , PG, PG Operating .................................... 40V/?0.3V Operating Junction Temperature Range IN SW ............................................................................. V LT3500EDD (Note 2) .......................... ?40?C to 125?C IN BST ................................................................ 55V/?0.3V LT3500IDD (Note 2) ........................... ?40?C to 125?C BST Pin Above SW ....................................................25V LT3500HDD (Note 2).......................... ?40?C to 150?C LDRV, SHDN ..............................................................15V LT3500EMSE (Note 2)........................ ?40?C to 125?C FB, LFB, R /SYNC .......................................................5V LT3500IMSE (Note 3) ........................ ?40?C to 125?C T SS, V ......................................................................2.5V LT3500HMSE (Note 2) ....................... ?40?C to 150?C C Storage Temperature Range ................... ?65?C to 150?C PIN CONFIGURATION TOP VIEW TOP VIEW V 1 12 SW 1 IN NC1 16 NC16 V 2 15 SW 2 11 BST IN SHDN 3 SHDN 14 BST 3 LDRV SS 10 SS 4 13 LDRV 13 17 5 PG 12 LFB 4 LFB PG 9 V 6 11 FB C 5 FB V 8 C 7 R /SYNC 10 PG T NC8 8 9 NC9 6 7 R /SYNC PG T MSE PACKAGE DD PACKAGE 16-LEAD PLASTIC MSE 12-LEAD (3mm ? 3mm) PLASTIC DFN ? = 45?C/W, ? = 10?C/W JA JC(PAD) ? = 45?C/W, ? = 10?C/W JA JC(PAD) EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3500EDD#PBF LT3500EDD#TRPBF LCRN 12-Lead (3mm ? 3mm) Plastic DFN ?40?C to 125?C LT3500IDD#PBF LT3500IDD#TRPBF LCRN 12-Lead (3mm ? 3mm) Plastic DFN ?40?C to 125?C LT3500HDD#PBF LT3500HDD#TRPBF LDCY 12-Lead (3mm ? 3mm) Plastic DFN ?40?C to 150?C LT3500EMSE#PBF LT3500EMSE#TRPBF 3500 16-Lead Plastic MSE ?40?C to 125?C LT3500IMSE#PBF LT3500IMSE#TRPBF 3500 16-Lead Plastic MSE ?40?C to 125?C LT3500HMSE#PBF LT3500HMSE#TRPBF 3500 16-Lead Plastic MSE ?40?C to 150?C Consult LTC Marketing for parts speci? ed with wider operating temperature ranges. *The temperature grade is identi? ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based ? nish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel speci? cations, go to: http://www.linear.com/tapeandreel/ 3500fc 2LT3500 The ELECTRICAL CHARACTERISTICS l denotes the speci? cations which apply over the full operating temperature range, otherwise speci? cations are at T = 25?C. V = 15V, V = 2V, unless otherwise speci? ed. J VIN RT/SYNC PARAMETER CONDITIONS MIN TYP MAX UNITS SHDN Threshold l 710 760 780 mV SHDN Source Current V = 0.62V 1.5 2.5 3.5 ?A SHDN SHDN Current Hysterisis 1.25 2 3.25 ?A l Minimum Input Voltage (Note 3) V = 0V 2.4 2.8 V FB Supply Shutdown Current V = 0V l 12 30 ?A SHDN Supply Quiescent Current V = 0.9V 2.5 3.5 mA FB FB Voltage V = 1V l 0.784 0.8 0.816 V VC V = 0.8V to 1.6V, V = 3V to 40V l 0.776 0.8 0.824 V VC IN FB Bias Current V = 0.8V, V = 1V 50 150 nA FB VC Error Ampli? er g V = 1V, I = ?10?A 150 250 350 ?mho m VC VC Error Ampli? er Source Current V = 0.6V, V = 1V 12 16 20 ?A FB VC Error Ampli? er Sink Current V = 1V, V = 1V 14 18 22 ?A FB VC Error Ampli? er High Clamp V = 0.6V 1.8 2.0 2.2 V FB Error Ampli? er Switching Threshold V = 0.6V 0.6 0.8 1.0 V FB SS Source Current V = 0.4V, V = 0.9V 2.25 2.75 3.75 ?A SS FB SS Sink Current V = 0V, V = 2V 300 600 900 ?A FB SS SS POR Sink Current (Note 4) V = 0V, V = 2V, Cycle SHDN 400 600 800 ?A FB SS SS POR Threshold 50 100 150 mV SS to FB Offset (V ? V)V = V , V = 0.4V 70 100 120 mV SS FB VC FS SS PG/PG Leakage V = 0.9V, V /V = 40V 0.1 1 ?A FB PG PG PG/PG Threshold (Rising) V = 0.4V 0.685 0.708 0.730 V PG PG/PG Hysteresis (Falling) V = 0.4V 20 30 40 mV PG PG Sink Current V = 0.4V, V = 0.7V 250 500 750 ?A PG FB PG Sink Current V = 0.4V, V = 0.9V 500 800 1100 ?A PG FB R /SYNC Reference Voltage V = 0.9V, R = 15k 0.75 0.850 0.975 V T FB RT/SYNC Switching Frequency R = 90.9k 450 500 550 kHz RT/SYNC R = 90.9k l 425 500 625 kHz RT/SYNC R = 15k 2 2.4 2.8 MHz RT/SYNC l SYNC Frequency Range 250 2500 kHz Minimum Switch On Time V = 0.7V, R = 90.9k 140 ns FB RT/SYNC Minimum Switch Off Time V = 0.7V, R = 90.9k 120 ns FB RT/SYNC Switch Leakage Current V = 0V 1 10 ?A SW Switch Saturation Voltage I = 2A, V = 18V, V = 0.7V 450 mV SW BST FB Switch Peak Current DD Package V = 18V, V = 0.7V 2.3 2.8 3.5 A BST FB l 2.1 2.8 3.5 A Switch Peak Current MSE Package V = 18V, V = 0.7V 2.3 2.9 3.5 A BST FB l 2.1 2.9 3.7 A Boost Current I = 2A, V = 20V, V = 0.7V 20 30 45 mA SW BST FB Minimum Boost Voltage (Note 5) I = 2A, V = 0.7V 2.2 3 V SW FB 3500fc 3LT3500 Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller FEATURES DESCRIPTION ? n Wide Input Range: 3V to 36V Operating, The LT 3500 is a current mode PWM step-down DC/DC 40V Maximum converter with an internal 2.3A switch. The wide input range n Short-Circuit Protected Over Full Input Range of 3V to 40V makes the LT3500 suitable for regulating n 2A Output Current Capability power from a wide variety of sources, including automo- n Adjustable/Synchronizable Fixed Frequency tive batteries, 24V industrial supplies and unregulated Operation from 250kHz to 2.2MHz wall adapters. n Soft-Start/Tracking Capability Resistor-programmable 250kHz to 2.2MHz frequency n Output Adjustable Down to 0.8V range and synchronization capability enable optimization n Adjustable Linear Regulator/Driver with 13mA between ef? ciency and external component size. Cycle- Output Capability by-cycle current limit, frequency foldback and thermal n Power Good Comparator with Complimentary shutdown provide protection against a shorted output. Outputs The soft-start feature controls the ramp rate of the output n Low Shutdown Current: 12?A voltage, eliminating input current surge during start-up, n Thermally Enhanced 3mm ? 3mm DFN or 16-Pin and also provides output tracking. MSOP Package The LT3500 contains an internal NPN transistor with feed- APPLICATIONS back control which can be con? gured as a linear regulator or as a linear regulator controller. n Automotive Battery Regulation n Industrial Control The LT3500?s low current shutdown mode (<12?A) enables n Wall Transformer Regulation easy power management in battery-powered systems. n Distributed Power Regulation L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Dual Step-Down Converters Switching Converter Ef? ciency Output Voltage Ripple 90 V IN V BST IN 6V TO 36V 85 0.47?F 2.2?F LT3500 6.8?H V OUT1 80 V = 5V AT 1A OUT1 SW 5V AC COUPLED 1A B240A SHDN 75 2mV/DIV 42.2k SS 22?F 70 0.47?F FB PG 8.06k 65 PG V = 3.3V AT 1A OUT2 AC COUPLED 60 R SYNC LDRV 2mV/DIV T/ V = 12V IN V 55 53.6k C I = 0A 1k OUT2 V 330pF 24.9k OUT2 FREQUENCY = 800kHz 50 LFB 3.3V 3500 TA01c 500ns/DIV 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 40.2k 1A 8.06k 22?F LOAD CURRENT (A) 3500 TA01b 3500 TA01a 3500fc 1 EFFICIENCY (%)LT3500 Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller FEATURES DESCRIPTION ? n Wide Input Range: 3V to 36V Operating, The LT 3500 is a current mode PWM step-down DC/DC 40V Maximum converter with an internal 2.3A switch. The wide input range n Short-Circuit Protected Over Full Input Range of 3V to 40V makes the LT3500 suitable for regulating n 2A Output Current Capability power from a wide variety of sources, including automo- n Adjustable/Synchronizable Fixed Frequency tive batteries, 24V industrial supplies and unregulated Operation from 250kHz to 2.2MHz wall adapters. n Soft-Start/Tracking Capability Resistor-programmable 250kHz to 2.2MHz frequency n Output Adjustable Down to 0.8V range and synchronization capability enable optimization n Adjustable Linear Regulator/Driver with 13mA between ef? ciency and external component size. Cycle- Output Capability by-cycle current limit, frequency foldback and thermal n Power Good Comparator with Complimentary shutdown provide protection against a shorted output. Outputs The soft-start feature controls the ramp rate of the output n Low Shutdown Current: 12?A voltage, eliminating input current surge during start-up, n Thermally Enhanced 3mm ? 3mm DFN or 16-Pin and also provides output tracking. MSOP Package The LT3500 contains an internal NPN transistor with feed- APPLICATIONS back control which can be con? gured as a linear regulator or as a linear regulator controller. n Automotive Battery Regulation n Industrial Control The LT3500?s low current shutdown mode (<12?A) enables n Wall Transformer Regulation easy power management in battery-powered systems. n Distributed Power Regulation L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Dual Step-Down Converters Switching Converter Ef? ciency Output Voltage Ripple 90 V IN V BST IN 6V TO 36V 85 0.47?F 2.2?F LT3500 6.8?H V OUT1 80 V = 5V AT 1A OUT1 SW 5V AC COUPLED 1A B240A SHDN 75 2mV/DIV 42.2k SS 22?F 70 0.47?F FB PG 8.06k 65 PG V = 3.3V AT 1A OUT2 AC COUPLED 60 R SYNC LDRV 2mV/DIV T/ V = 12V IN V 55 53.6k C I = 0A 1k OUT2 V 330pF 24.9k OUT2 FREQUENCY = 800kHz 50 LFB 3.3V 3500 TA01c 500ns/DIV 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 40.2k 1A 8.06k 22?F LOAD CURRENT (A) 3500 TA01b 3500 TA01a 3500fc 1 EFFICIENCY (%)LT3500 (Note 1) ABSOLUTE MAXIMUM RATINGS V , PG, PG Operating .................................... 40V/?0.3V Operating Junction Temperature Range IN SW ............................................................................. V LT3500EDD (Note 2) .......................... ?40?C to 125?C IN BST ................................................................ 55V/?0.3V LT3500IDD (Note 2) ........................... ?40?C to 125?C BST Pin Above SW ....................................................25V LT3500HDD (Note 2).......................... ?40?C to 150?C LDRV, SHDN ..............................................................15V LT3500EMSE (Note 2)........................ ?40?C to 125?C FB, LFB, R /SYNC .......................................................5V LT3500IMSE (Note 3) ........................ ?40?C to 125?C T SS, V ......................................................................2.5V LT3500HMSE (Note 2) ....................... ?40?C to 150?C C Storage Temperature Range ................... ?65?C to 150?C PIN CONFIGURATION TOP VIEW TOP VIEW V 1 12 SW 1 IN NC1 16 NC16 V 2 15 SW 2 11 BST IN SHDN 3 SHDN 14 BST 3 LDRV SS 10 SS 4 13 LDRV 13 17 5 PG 12 LFB 4 LFB PG 9 V 6 11 FB C 5 FB V 8 C 7 R /SYNC 10 PG T NC8 8 9 NC9 6 7 R /SYNC PG T MSE PACKAGE DD PACKAGE 16-LEAD PLASTIC MSE 12-LEAD (3mm ? 3mm) PLASTIC DFN ? = 45?C/W, ? = 10?C/W JA JC(PAD) ? = 45?C/W, ? = 10?C/W JA JC(PAD) EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3500EDD#PBF LT3500EDD#TRPBF LCRN 12-Lead (3mm ? 3mm) Plastic DFN ?40?C to 125?C LT3500IDD#PBF LT3500IDD#TRPBF LCRN 12-Lead (3mm ? 3mm) Plastic DFN ?40?C to 125?C LT3500HDD#PBF LT3500HDD#TRPBF LDCY 12-Lead (3mm ? 3mm) Plastic DFN ?40?C to 150?C LT3500EMSE#PBF LT3500EMSE#TRPBF 3500 16-Lead Plastic MSE ?40?C to 125?C LT3500IMSE#PBF LT3500IMSE#TRPBF 3500 16-Lead Plastic MSE ?40?C to 125?C LT3500HMSE#PBF LT3500HMSE#TRPBF 3500 16-Lead Plastic MSE ?40?C to 150?C Consult LTC Marketing for parts speci? ed with wider operating temperature ranges. *The temperature grade is identi? ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based ? nish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel speci? cations, go to: http://www.linear.com/tapeandreel/ 3500fc 2LT3500 Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller FEATURES DESCRIPTION ? n Wide Input Range: 3V to 36V Operating, The LT 3500 is a current mode PWM step-down DC/DC 40V Maximum converter with an internal 2.3A switch. The wide input range n Short-Circuit Protected Over Full Input Range of 3V to 40V makes the LT3500 suitable for regulating n 2A Output Current Capability power from a wide variety of sources, including automo- n Adjustable/Synchronizable Fixed Frequency tive batteries, 24V industrial supplies and unregulated Operation from 250kHz to 2.2MHz wall adapters. n Soft-Start/Tracking Capability Resistor-programmable 250kHz to 2.2MHz frequency n Output Adjustable Down to 0.8V range and synchronization capability enable optimization n Adjustable Linear Regulator/Driver with 13mA between ef? ciency and external component size. Cycle- Output Capability by-cycle current limit, frequency foldback and thermal n Power Good Comparator with Complimentary shutdown provide protection against a shorted output. Outputs The soft-start feature controls the ramp rate of the output n Low Shutdown Current: 12?A voltage, eliminating input current surge during start-up, n Thermally Enhanced 3mm ? 3mm DFN or 16-Pin and also provides output tracking. MSOP Package The LT3500 contains an internal NPN transistor with feed- APPLICATIONS back control which can be con? gured as a linear regulator or as a linear regulator controller. n Automotive Battery Regulation n Industrial Control The LT3500?s low current shutdown mode (<12?A) enables n Wall Transformer Regulation easy power management in battery-powered systems. n Distributed Power Regulation L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Dual Step-Down Converters Switching Converter Ef? ciency Output Voltage Ripple 90 V IN V BST IN 6V TO 36V 85 0.47?F 2.2?F LT3500 6.8?H V OUT1 80 V = 5V AT 1A OUT1 SW 5V AC COUPLED 1A B240A SHDN 75 2mV/DIV 42.2k SS 22?F 70 0.47?F FB PG 8.06k 65 PG V = 3.3V AT 1A OUT2 AC COUPLED 60 R SYNC LDRV 2mV/DIV T/ V = 12V IN V 55 53.6k C I = 0A 1k OUT2 V 330pF 24.9k OUT2 FREQUENCY = 800kHz 50 LFB 3.3V 3500 TA01c 500ns/DIV 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 40.2k 1A 8.06k 22?F LOAD CURRENT (A) 3500 TA01b 3500 TA01a 3500fc 1 EFFICIENCY (%)LT3500 Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller FEATURES DESCRIPTION ? n Wide Input Range: 3V to 36V Operating, The LT 3500 is a current mode PWM step-down DC/DC 40V Maximum converter with an internal 2.3A switch. The wide input range n Short-Circuit Protected Over Full Input Range of 3V to 40V makes the LT3500 suitable for regulating n 2A Output Current Capability power from a wide variety of sources, including automo- n Adjustable/Synchronizable Fixed Frequency tive batteries, 24V industrial supplies and unregulated Operation from 250kHz to 2.2MHz wall adapters. n Soft-Start/Tracking Capability Resistor-programmable 250kHz to 2.2MHz frequency n Output Adjustable Down to 0.8V range and synchronization capability enable optimization n Adjustable Linear Regulator/Driver with 13mA between ef? ciency and external component size. Cycle- Output Capability by-cycle current limit, frequency foldback and thermal n Power Good Comparator with Complimentary shutdown provide protection against a shorted output. Outputs The soft-start feature controls the ramp rate of the output n Low Shutdown Current: 12?A voltage, eliminating input current surge during start-up, n Thermally Enhanced 3mm ? 3mm DFN or 16-Pin and also provides output tracking. MSOP Package The LT3500 contains an internal NPN transistor with feed- APPLICATIONS back control which can be con? gured as a linear regulator or as a linear regulator controller. n Automotive Battery Regulation n Industrial Control The LT3500?s low current shutdown mode (<12?A) enables n Wall Transformer Regulation easy power management in battery-powered systems. n Distributed Power Regulation L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Dual Step-Down Converters Switching Converter Ef? ciency Output Voltage Ripple 90 V IN V BST IN 6V TO 36V 85 0.47?F 2.2?F LT3500 6.8?H V OUT1 80 V = 5V AT 1A OUT1 SW 5V AC COUPLED 1A B240A SHDN 75 2mV/DIV 42.2k SS 22?F 70 0.47?F FB PG 8.06k 65 PG V = 3.3V AT 1A OUT2 AC COUPLED 60 R SYNC LDRV 2mV/DIV T/ V = 12V IN V 55 53.6k C I = 0A 1k OUT2 V 330pF 24.9k OUT2 FREQUENCY = 800kHz 50 LFB 3.3V 3500 TA01c 500ns/DIV 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 40.2k 1A 8.06k 22?F LOAD CURRENT (A) 3500 TA01b 3500 TA01a 3500fc 1 EFFICIENCY (%)LT3500 (Note 1) ABSOLUTE MAXIMUM RATINGS V , PG, PG Operating .................................... 40V/?0.3V Operating Junction Temperature Range IN SW ............................................................................. V LT3500EDD (Note 2) .......................... ?40?C to 125?C IN BST ................................................................ 55V/?0.3V LT3500IDD (Note 2) ........................... ?40?C to 125?C BST Pin Above SW ....................................................25V LT3500HDD (Note 2).......................... ?40?C to 150?C LDRV, SHDN ..............................................................15V LT3500EMSE (Note 2)........................ ?40?C to 125?C FB, LFB, R /SYNC .......................................................5V LT3500IMSE (Note 3) ........................ ?40?C to 125?C T SS, V ......................................................................2.5V LT3500HMSE (Note 2) ....................... ?40?C to 150?C C Storage Temperature Range ................... ?65?C to 150?C PIN CONFIGURATION TOP VIEW TOP VIEW V 1 12 SW 1 IN NC1 16 NC16 V 2 15 SW 2 11 BST IN SHDN 3 SHDN 14 BST 3 LDRV SS 10 SS 4 13 LDRV 13 17 5 PG 12 LFB 4 LFB PG 9 V 6 11 FB C 5 FB V 8 C 7 R /SYNC 10 PG T NC8 8 9 NC9 6 7 R /SYNC PG T MSE PACKAGE DD PACKAGE 16-LEAD PLASTIC MSE 12-LEAD (3mm ? 3mm) PLASTIC DFN ? = 45?C/W, ? = 10?C/W JA JC(PAD) ? = 45?C/W, ? = 10?C/W JA JC(PAD) EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3500EDD#PBF LT3500EDD#TRPBF LCRN 12-Lead (3mm ? 3mm) Plastic DFN ?40?C to 125?C LT3500IDD#PBF LT3500IDD#TRPBF LCRN 12-Lead (3mm ? 3mm) Plastic DFN ?40?C to 125?C LT3500HDD#PBF LT3500HDD#TRPBF LDCY 12-Lead (3mm ? 3mm) Plastic DFN ?40?C to 150?C LT3500EMSE#PBF LT3500EMSE#TRPBF 3500 16-Lead Plastic MSE ?40?C to 125?C LT3500IMSE#PBF LT3500IMSE#TRPBF 3500 16-Lead Plastic MSE ?40?C to 125?C LT3500HMSE#PBF LT3500HMSE#TRPBF 3500 16-Lead Plastic MSE ?40?C to 150?C Consult LTC Marketing for parts speci? ed with wider operating temperature ranges. *The temperature grade is identi? ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based ? nish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel speci? cations, go to: http://www.linear.com/tapeandreel/ 3500fc 2LT3500 The ELECTRICAL CHARACTERISTICS l denotes the speci? cations which apply over the full operating temperature range, otherwise speci? cations are at T = 25?C. V = 15V, V = 2V, unless otherwise speci? ed. J VIN RT/SYNC PARAMETER CONDITIONS MIN TYP MAX UNITS SHDN Threshold l 710 760 780 mV SHDN Source Current V = 0.62V 1.5 2.5 3.5 ?A SHDN SHDN Current Hysterisis 1.25 2 3.25 ?A l Minimum Input Voltage (Note 3) V = 0V 2.4 2.8 V FB Supply Shutdown Current V = 0V l 12 30 ?A SHDN Supply Quiescent Current V = 0.9V 2.5 3.5 mA FB FB Voltage V = 1V l 0.784 0.8 0.816 V VC V = 0.8V to 1.6V, V = 3V to 40V l 0.776 0.8 0.824 V VC IN FB Bias Current V = 0.8V, V = 1V 50 150 nA FB VC Error Ampli? er g V = 1V, I = ?10?A 150 250 350 ?mho m VC VC Error Ampli? er Source Current V = 0.6V, V = 1V 12 16 20 ?A FB VC Error Ampli? er Sink Current V = 1V, V = 1V 14 18 22 ?A FB VC Error Ampli? er High Clamp V = 0.6V 1.8 2.0 2.2 V FB Error Ampli? er Switching Threshold V = 0.6V 0.6 0.8 1.0 V FB SS Source Current V = 0.4V, V = 0.9V 2.25 2.75 3.75 ?A SS FB SS Sink Current V = 0V, V = 2V 300 600 900 ?A FB SS SS POR Sink Current (Note 4) V = 0V, V = 2V, Cycle SHDN 400 600 800 ?A FB SS SS POR Threshold 50 100 150 mV SS to FB Offset (V ? V)V = V , V = 0.4V 70 100 120 mV SS FB VC FS SS PG/PG Leakage V = 0.9V, V /V = 40V 0.1 1 ?A FB PG PG PG/PG Threshold (Rising) V = 0.4V 0.685 0.708 0.730 V PG PG/PG Hysteresis (Falling) V = 0.4V 20 30 40 mV PG PG Sink Current V = 0.4V, V = 0.7V 250 500 750 ?A PG FB PG Sink Current V = 0.4V, V = 0.9V 500 800 1100 ?A PG FB R /SYNC Reference Voltage V = 0.9V, R = 15k 0.75 0.850 0.975 V T FB RT/SYNC Switching Frequency R = 90.9k 450 500 550 kHz RT/SYNC R = 90.9k l 425 500 625 kHz RT/SYNC R = 15k 2 2.4 2.8 MHz RT/SYNC l SYNC Frequency Range 250 2500 kHz Minimum Switch On Time V = 0.7V, R = 90.9k 140 ns FB RT/SYNC Minimum Switch Off Time V = 0.7V, R = 90.9k 120 ns FB RT/SYNC Switch Leakage Current V = 0V 1 10 ?A SW Switch Saturation Voltage I = 2A, V = 18V, V = 0.7V 450 mV SW BST FB Switch Peak Current DD Package V = 18V, V = 0.7V 2.3 2.8 3.5 A BST FB l 2.1 2.8 3.5 A Switch Peak Current MSE Package V = 18V, V = 0.7V 2.3 2.9 3.5 A BST FB l 2.1 2.9 3.7 A Boost Current I = 2A, V = 20V, V = 0.7V 20 30 45 mA SW BST FB Minimum Boost Voltage (Note 5) I = 2A, V = 0.7V 2.2 3 V SW FB 3500fc 3

Tariff Concession Code
Tariff Desc

Free
8542.31.00 51 No ..Application Specific (Digital) Integrated Circuits (ASIC)

Electronic integrated circuits: Processors and controllers, whether or not combined with memories, converters, logic circuits, amplifiers, clock and timing circuits, or other circuits
Monolithic integrated circuits:
AD4
ANALOG DEVICES
Analog Devices Hittite
ANALOG DEVICES (LINEAR TECHNOLOGY)
Analog Devices / Hittite
Analog Devices / Linear Technology
Analog Devices Inc
Analog Devices Inc.
Analog Devices, Inc.
ANALOG MICRO ELECTRONICS
ANALOG MICROELECTRONICS
LINEAR
LINEAR TECH
Linear Technology
Linear Technology (part of ADI)
LT
LT4
Technology