RT8239A Main Power Supply Controller

RICHTEK

Description

® RT8239A/B/C High Efficiency, Main Power Supply Controller for Notebook Computers General .
The RT8239A/B/C is a dual step down, Switch Mode Power Supply (SMPS) controller which generates logic supply voltages for battery powered systems.

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Datasheet Specifications

Part number: RT8239A
Manufacturer: RICHTEK
File Size: 404.06 KB
Datasheet: RT8239A_RICHTEK.pdf
Description: Main Power Supply Controller

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

Applications

* an ultrasonic mode is included, which maintains the switching frequency above 25kHz. Moreover, a diode emulation mode maximizes efficiency for light load applications. The SMPS1/SMPS2 switching frequency can be adjustable from 200kHz/233kHz to 400kHz/466kHz respectively. The RT8239A/B/C is availabl

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RT8239A Main Power Supply Controller RICHTEK

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