DESCRIPTION
The LT®3570 is a buck and boost converter with internal power switches and LDO controller. Each converter is designed with a 1.5A current limit and an input range from 2.5V to 36V, making the LT3570 ideal for a wide variety of applications. Switching frequencies up to 2.1MHz are programmed with an external timing resistor and the oscillator can be synchronized to an external clock up to 2.75MHz.

FEATURES
■ 2.5V to 36V Input Voltage Range
■ Programmable Switching Frequency from 500kHz to 2.1MHz
■ Synchronizable Up to 2.75MHz
■ VOUT(MIN): 0.8V
■ Independent Soft-Start for Each Converter
■ Separate VIN Supplies for Each Converter
■ Duty Cycle Range: 0% to 90% at 1MHz
■ Available in 24-Lead (4mm × 4mm) QFN and 20-Lead TSSOP Packages

APPLICATIONS
■ Cable and Satellite Set-Top Boxes
■ Automotive Systems
■ Telecom Systems
■ “Dying Gasp” Systems
■ TFT LCD Displays