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RT8239B - Main Power Supply Controller

Download the RT8239B datasheet PDF. This datasheet also covers the RT8239A variant, as both devices belong to the same main power supply controller family and are provided as variant models within a single manufacturer datasheet.

Description

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.

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.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (RT8239A_RICHTEK.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number RT8239B
Manufacturer Richtek
File Size 404.06 KB
Description Main Power Supply Controller
Datasheet download datasheet RT8239B Datasheet

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Other Datasheets by Richtek

Part Number Description
RT8239A Main Power Supply Controller
RT8239C Main Power Supply Controller
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Full PDF Text Transcription

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® RT8239A/B/C High Efficiency, Main Power Supply Controller for Notebook Computers General Description 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. An optional external charge pump can be monitored through SECFB (RT8239B/C). Other features include on board power up sequencing, a power good output, internal softstart, and a soft discharge output that prevents negative voltage during shutdown.
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