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RT6545B - Dual-Channel Synchronous DC/DC Step-Down Controller

Download the RT6545B datasheet PDF. This datasheet also covers the RT6545A variant, as both devices belong to the same dual-channel synchronous dc/dc step-down controller family and are provided as variant models within a single manufacturer datasheet.

General Description

The RT6545A/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.

Key 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 RT6545A/B automatically switches to the diode-emulation mode in light load.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (RT6545A-Richtek.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number RT6545B
Manufacturer Richtek
File Size 258.16 KB
Description Dual-Channel Synchronous DC/DC Step-Down Controller
Datasheet download datasheet RT6545B Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
® RT6545A/B Dual-Channel Synchronous DC/DC Step-Down Controller with 5V/3.3V LDOs General Description The RT6545A/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 RT6545A/B has an oscillator output to driver 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.