L5970D 开关稳压器 STM

L5970D

开关稳压器 1.2 to 35V Step-Down Up to 1A step down switching regulator

Description

The L5970D is a step down monolithic power switching regulator capable to deliver up to 1A at output voltages from 1.2V to 35V.

The device uses an internal P-Channel D-MOS transistor (with a typical Rdson of 250mΩ) as switching element to minimize the size of the external components.

An internal oscillator fixes the switching frequency  at 250KHz.

Features L5970D

■ Up to 1A output current

■ Operating input voltage from 4.4V to 36V

■ 3.3V / (±2%) reference voltage

■ Output voltage adjustable from 1.2V to 35V

■ Low dropout operation: 100% duty cycle

■ 250KHz Internally fixed frequency

■ Voltage feedforward

■ Zero load current operation

■ Internal current limiting

■ Inhibit for zero current consumption

■ Synchronization

■ Protection against feedback disconnection

■ Thermal shutdown

Applications L5970D

■ Consumer: STB, DVD, TV, VCR, car radio, LCD monitors

■ Networking: XDSL, modems, DC-DC modules

■ Computer: printers, audio/graphic cards, optical storage, hard disk drive

■ Industrial: changers, car battery, DC-DC converters