LT3957AIUHE#PBF

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Analog Devices Inc./Maxim Integrated

BOOST, FLYBACK, SEPIC AND INVERTING CONVERTER WITH 5A, 40V SWITCH

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LT3957AIUHE#PBF

Active

Analog Devices Inc./Maxim Integrated

BOOST, FLYBACK, SEPIC AND INVERTING CONVERTER WITH 5A, 40V SWITCH

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Description Specifications Series Pricing CAD Documents

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

Technical Specifications

Parameters and characteristics for this part

Specification	LT3957AIUHE#PBF

Current - Output	5 A
Frequency - Switching (Max)	1 MHz
Frequency - Switching (Min)	100 kHz
Function	Step-Up, Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive or Negative, Positive, Negative
Output Type	Adjustable
Package Leads	28 Leads
Package Length	5 mm
Package Name	36-WFQFN, 36-QFN
Package Width	6 mm
Synchronous Rectifier	No
Topology	Boost, SEPIC, Cuk, Flyback
Voltage - Input (Max)	40 V
Voltage - Input (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	Package Width	Package Name	Package Length	Function	Voltage - Output (Max)	Operating Temperature (Max)	Operating Temperature (Min)	Voltage - Output (Min/Fixed)	Topology	Frequency - Switching (Max)	Frequency - Switching (Min)	Number of Outputs	Mounting Type	Voltage - Input (Min)	Output Type	Current - Output	Synchronous Rectifier	Voltage - Input (Max)	Package Leads	Output Configuration
Analog Devices Inc./Maxim Integrated LT3957AEUHE#TRPBF	6 mm	36-QFN 36-WFQFN	5 mm	Step-Up Step-Up/Step-Down	40 V	125 °C	-40 °C	1.6 V	Boost Cuk Flyback SEPIC	1 MHz	100 kHz	1	Surface Mount	3 V	Adjustable	5 A	No	40 V	28 Leads	Negative Positive Positive or Negative
Analog Devices Inc./Maxim Integrated LT3957AIUHE#TRPBF	6 mm	36-QFN 36-WFQFN	5 mm	Step-Up Step-Up/Step-Down	40 V	125 °C	-40 °C	1.6 V	Boost Cuk Flyback SEPIC	1 MHz	100 kHz	1	Surface Mount	3 V	Adjustable	5 A	No	40 V	28 Leads	Negative Positive Positive or Negative
Analog Devices Inc./Maxim Integrated LT3957AEUHE#PBF	6 mm	36-QFN 36-WFQFN	5 mm	Step-Up Step-Up/Step-Down	40 V	125 °C	-40 °C	1.6 V	Boost Cuk Flyback SEPIC	1 MHz	100 kHz	1	Surface Mount	3 V	Adjustable	5 A	No	40 V	28 Leads	Negative Positive Positive or Negative
Analog Devices Inc./Maxim Integrated LT3957AIUHE#PBF	6 mm	36-QFN 36-WFQFN	5 mm	Step-Up Step-Up/Step-Down	40 V	125 °C	-40 °C	1.6 V	Boost Cuk Flyback SEPIC	1 MHz	100 kHz	1	Surface Mount	3 V	Adjustable	5 A	No	40 V	28 Leads	Negative Positive Positive or Negative

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R530 Reliability Data

LT3957AIUHE#PBF | Datasheet