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RT6575B - Dual-Channel Synchronous DC/DC Step-Down Controller

This page provides the datasheet information for the RT6575B, a member of the RT6575A Dual-Channel Synchronous DC/DC Step-Down Controller family.

Datasheet Summary

Description

The RT6575A/B is a dual-channel step-down controller generating supply voltages for battery-powered systems.

It includes two Pulse-Width Modulation (PWM) controllers adjustable from 2V to 5.5V, and two fixed 5V/3.3V linear regulators.

Features

  • include on-board power-up sequencing, a powergood output, internal soft-start, and soft-discharge output that prevents negative voltage during shutdown. A constant current ripple PWM control scheme operates without sense resistors and provides 100ns response to load transient. For maximizing power efficiency, the RT6575A/B automatically switches to the diode-emulation mode in light load.

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Datasheet preview – RT6575B

Datasheet Details

Part number RT6575B
Manufacturer Richtek
File Size 264.38 KB
Description Dual-Channel Synchronous DC/DC Step-Down Controller
Datasheet download datasheet RT6575B Datasheet
Additional preview pages of the RT6575B datasheet.

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Full PDF Text Transcription

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® RT6575A/B Dual-Channel Synchronous DC-DC Step-Down Controller with 5V/3.3V LDOs General Description The RT6575A/B is a dual-channel step-down controller generating supply voltages for battery-powered systems. It includes two Pulse-Width Modulation (PWM) controllers adjustable from 2V to 5.5V, and two fixed 5V/3.3V linear regulators. Each linear regulator provides up to 100mA output current and 3.3V linear regulator provides 1% accuracy under 35mA. The RT6575A/B has an oscillator output to drive the external charge pump application. Other features include on-board power-up sequencing, a powergood output, internal soft-start, and soft-discharge output that prevents negative voltage during shutdown.
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