LT3430IFEPBF DC/DC step-down switching regulator, 5.5 ... 60 Vin, 3 A, 200 KH

High Voltage, 3A, 200kHz Step-Down Switching Regulators

Description: The LT®3430/LT3430-1 are monolithic buck switching regulators that accept input voltages up to 60V. A high efficiency 3A, 0.1O switch is included on the die along with all the necessary oscillator, control and logic circuitry. A current mode architecture provides fast transient response and excellent loop stability. Special design techniques and a new high voltage process achieve high effi ciency over a wide input range. Efficiency is maintained over a wide output current range by using the output to bias the circuitry and by utilizing a supply boost capacitor to saturate the power switch. Patented circuitry* maintains peak switch current over the full duty cycle range. A shutdown pin reduces supply current to 30µA and a SYNC pin can be externally synchronized with a logic level input from 228kHz to 700kHz for the LT3430 or from 125kHz to 250kHz for the LT3430-1. The LT3430/LT3430-1 are available in a thermally enhanced 16-pin TSSOP package.

Features - Wide Input Range: 5.5V to 60V - 3A Peak Switch Current over All Duty Cycles - Constant Switching Frequency: - 200kHz (LT3430) - 100kHz (LT3430-1) - 0.1O Switch Resistance - Current Mode - Effective Supply Current: 2.5mA - Shutdown Current: 30µA - 1.2V Feedback Reference Voltage - Easily Synchronizable - Cycle-by-Cycle Current Limiting - Small, 16-Pin Thermally Enhanced TSSOP Package

Applications - Industrial and Automotive Power Supplies - Portable Computers - Battery Chargers - Distributed Power Systems