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RT6585B - Dual-Channel Synchronous DC/DC Step-Down Controller

Download the RT6585B datasheet PDF. This datasheet also covers the RT6585A 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.

Description

The RT6585A/B is a dual-channel step-down, controller generating supply voltages for batterypowered 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 power-good 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 RT6585A/B automatically switches to the diode-emulation mode in light load.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (RT6585A-Richtek.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number RT6585B
Manufacturer Richtek
File Size 1.43 MB
Description Dual-Channel Synchronous DC/DC Step-Down Controller
Datasheet download datasheet RT6585B 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
RT6585A/B Dual-Channel Synchronous DC-DC Step-Down Controller with 5V/3.3V LDOs 1 General Description The RT6585A/B is a dual-channel step-down, controller generating supply voltages for batterypowered 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 RT6585A/B provides a mode selection pin, SKIPSEL, to select Diode-Emulation Mode (DEM) or Audio Skipping Mode (ASM). Other features include on-board power-up sequencing, a power-good output, internal soft-start, and soft-discharge output that prevents negative voltage during shutdown.
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