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RT8243B Datasheet Main Power Supply Controller

Manufacturer: Richtek

Download the RT8243B datasheet PDF. This datasheet also includes the RT8243A variant, as both parts are published together in a single manufacturer document.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (RT8243A-Richtek.pdf) that lists specifications for multiple related part numbers.

General Description

The RT8243A/B/C is a dual step down, Switch Mode Power Supply (SMPS) controller which generates logic supply voltages for battery powered systems.

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

One of the controllers (LDO5) provides automatic switch over to the BYP1 input connected to the main SMPS1 output for maximized efficiency.

Overview

® RT8243A/B/C High Efficiency, Main Power Supply Controller for Notebook Computers.

Key Features

  • include on board power up sequencing, a power good output, internal softstart, and a soft discharge output that prevents negative voltage during shutdown. A constant on-time PWM control scheme operates without sense resistors and assures fast load transient response while maintaining nearly constant switching frequency. To eliminate noise in audio.

More Datasheets from Richtek

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