RT8239B Datasheet Main Power Supply Controller

Manufacturer: Richtek

Overview: ® RT8239A/B/C High Efficiency, Main Power Supply Controller for Notebook.

This datasheet includes multiple variants, all published together in a single manufacturer document.

Datasheet Details

Part number	RT8239B
Manufacturer	Richtek
File Size	404.06 KB
Description	Main Power Supply Controller
Datasheet	RT8239B RT8239A Datasheet (PDF)

The RT8239A/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.

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.

Part Number	Description
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RT8239C	Main Power Supply Controller
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RT8230D	Dual-Channel Synchronous DC/DC Step-Down Controller
RT8230E	Dual-Channel Synchronous DC/DC Step-Down Controller
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RT8231B	Complete DDR Memory Power Supply Controller
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