LTC1625CS

DC-DC Cntrlr Single-OUT Step Down 165kHz Automotive 16Pin SOIC N

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