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LT3740

Linear Technology
Part Number LT3740
Manufacturer Linear Technology
Description Synchronous Step-Down Controller
Published Feb 8, 2010
Detailed Description FEATURES n n n n n n n n n n n n n LT3740 Wide Operating Range, Valley Mode, No RSENSE™ Synchronous Step-Down Controlle...
Datasheet PDF File LT3740 PDF File

LT3740
LT3740

Overview
FEATURES n n n n n n n n n n n n n LT3740 Wide Operating Range, Valley Mode, No RSENSE™ Synchronous Step-Down Controller DESCRIPTION The LT®3740 is a synchronous step-down switching regulator controller that drives N-channel power MOSFET stages.
The controller uses valley current mode architecture to achieve very low duty cycles with excellent transient response without requiring a sense resistor.
The LT3740 includes an internal step-up converter to provide a bias 7.
8V higher than the input voltage for the drive.
This enables the part to work from an input voltage as low as 2.
2V.
The XREF pin is an external reference input that allows the user to override the internal 0.
8V feedback reference with any lower value, allowing full control of the output voltage during operation, output voltage tracking or soft-start.
The LT3740 has three current limit levels that can be chosen by connecting the RANGE pin to ground, open, and input respectively.
L, LT, LTC and LTM are registered trademarks ...


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