Specification	LT3957AIUHE#TRPBF

Current - Output	5 A
Frequency - Switching [Max]	1 MHz
Frequency - Switching [Min]	100 kHz
Function	Step-Up/Step-Down, Step-Up
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 C
Output Configuration	Positive or Negative
Output Type	Adjustable
Package / Case	36-WFQFN, 28 Leads, Exposed Pad
Supplier Device Package	36-QFN
Supplier Device Package [x]	5
Supplier Device Package [y]	6
Synchronous Rectifier	False
Topology	Boost, Cuk, Flyback, SEPIC
Voltage - Input (Min) [Min]	3 V
Voltage - Output (Max)	40 V
Voltage - Output (Min/Fixed)	1.6 V

LT3957A Series

Boost, Flyback, SEPIC and Inverting Converter with 5A, 40V Switch

Part	Supplier Device Package [y]	Supplier Device Package [x]	Supplier Device Package	Function	Voltage - Output (Max)	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Output (Min/Fixed)	Topology	Frequency - Switching [Min]	Frequency - Switching [Max]	Number of Outputs	Mounting Type	Voltage - Input (Min) [Min]	Output Type	Current - Output	Package / Case	Output Configuration
Analog Devices Inc./Maxim Integrated LT3957AEUHE#TRPBF	6	5	36-QFN	Step-Up Step-Up/Step-Down	40 V	-40 C	125 °C	1.6 V	Boost Cuk Flyback SEPIC	100 kHz	1 MHz	1	Surface Mount	3 V	Adjustable	5 A	36-WFQFN 28 Leads Exposed Pad	Positive or Negative
Analog Devices Inc./Maxim Integrated LT3957AIUHE#TRPBF	6	5	36-QFN	Step-Up Step-Up/Step-Down	40 V	-40 C	125 °C	1.6 V	Boost Cuk Flyback SEPIC	100 kHz	1 MHz	1	Surface Mount	3 V	Adjustable	5 A	36-WFQFN 28 Leads Exposed Pad	Positive or Negative
Analog Devices Inc./Maxim Integrated LT3957AEUHE#PBF	6	5	36-QFN	Step-Up Step-Up/Step-Down	40 V	-40 C	125 °C	1.6 V	Boost Cuk Flyback SEPIC	100 kHz	1 MHz	1	Surface Mount	3 V	Adjustable	5 A	36-WFQFN 28 Leads Exposed Pad	Positive or Negative
Analog Devices Inc./Maxim Integrated LT3957AIUHE#PBF	6	5	36-QFN	Step-Up Step-Up/Step-Down	40 V	-40 C	125 °C	1.6 V	Boost Cuk Flyback SEPIC	100 kHz	1 MHz	1	Surface Mount	3 V	Adjustable	5 A	36-WFQFN 28 Leads Exposed Pad	Positive or Negative

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	N/A	0	$ 5.09	1m+

Description

General part information

LT3957A Series

The LT3957A is a wide input range, current mode DC/DC converter which is capable of generating either positive or negative output voltages. It can be configured as either a boost, flyback, SEPIC or inverting converter. It features an internal low side N-channel power MOSFET rated for 40V at 5A and driven from an internal regulated 5.2V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages.The operating frequency of LT3957A can be set with an external resistor over a 100kHz to 1MHz range, and can be synchronized to an external clock using the SYNC pin. A minimum operating supply voltage of 3V, and a low shutdown quiescent current of less than 1μA, make the LT3957A ideally suited for battery-powered systems.The LT3957A features soft-start and frequency foldback functions to limit inductor current during start-up. The LT3957A has improved load transient performance compared to the LT3957.FeaturesLT3957-LT3957AImproved Load Transient PerformanceApplicationsAutomotiveTelecomIndustrial

Documents

Technical documentation and resources

LT3957AIUHE#TRPBF | Datasheet

Datasheet

R530 Reliability Data

Reliability Data