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LT3757A

Linear
Part Number LT3757A
Manufacturer Linear
Description SEPIC and Inverting Controller
Published Nov 23, 2013
Detailed Description LT3757/LT3757A Boost, Flyback, SEPIC and Inverting Controller Features Wide Input Voltage Range: 2.9V to 40V n Positi...
Datasheet PDF File LT3757A PDF File

LT3757A
LT3757A


Overview
LT3757/LT3757A Boost, Flyback, SEPIC and Inverting Controller Features Wide Input Voltage Range: 2.
9V to 40V n Positive or Negative Output Voltage Programming with a Single Feedback Pin n Current Mode Control Provides Excellent Transient Response n Programmable Operating Frequency (100kHz to 1MHz) with One External Resistor n Synchronizable to an External Clock n Low Shutdown Current < 1µA n Internal 7.
2V Low Dropout Voltage Regulator n Programmable Input Undervoltage Lockout with Hysteresis n Programmable Soft-Start n Small 10-Lead DFN (3mm × 3mm) and Thermally Enhanced 10-Pin MSOP Packages n Description The LT®3757/LT3757A are wide input range, current mode, DC/DC controllers which are capable of generating either positive or negative output voltages.
They can be configured as either a boost, flyback, SEPIC or inverting converter.
The LT3757/LT3757A drive a low side external N-channel power MOSFET from an internal regulated 7.
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 LT3757/LT3757A 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 low minimum operating supply voltage of 2.
9V, and a low shutdown quiescent current of less than 1µA, make the LT3757/LT3757A ideally suited for batteryoperated systems.
The LT3757/LT3757A feature soft-start and frequency foldback functions to limit inductor current during start-up and output short-circuit.
The LT3757A has improved load transient performance compared to the LT3757.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks and No RSENSE and ThinSOT are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Applications Automotive and Industrial Boost, Flyback, SEPIC and Inverting Converters n Telecom Power Supplies n ...


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