LTC1625IS Datasheet PDF - Linear Technology

●DESCRIPTION

●The LTC®1625 is a synchronous step-down switching regulator controller that drives external N-Channel power MOSFETs using few  external components. Current mode control with MOSFET VDS sensing eliminates the need for a sense resistor and improves efficiency. The frequency of a nominal 150kHz internal oscillator can be synchronized to an external clock over a 1.5:1 frequency range.

●FEATURES

●■ Highest Efficiency Current Mode Controller

●■ No Sense Resistor Required

●■ Stable High Current Operation

●■ Dual N-Channel MOSFET Synchronous Drive

●■ Wide VIN Range: 3.7V to 36V

●■ Wide VOUT Range: 1.19V to VIN

●■ ±1% 1.19V Reference

●■ Programmable Fixed Frequency with Injection Lock

●■ Very Low Drop Out Operation: 99% Duty Cycle

●■ Forced Continuous Mode Control Pin

●■ Optional Programmable Soft Start

●■ Pin Selectable Output Voltage

●■ Foldback Current Limit

●■ Output Overvoltage Protection

●■ Logic Controlled Micropower Shutdown: IQ < 30µA

●■ Available in 16-Lead Narrow SSOP and SO Packages

●APPLICATIONS

●■ Notebook and Palmtop Computers, PDAs

●■ Cellular Telephones and Wireless Modems

●■ Battery Chargers

●■ Distributed Power