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RT8223B - Main Power Supply Controller

This page provides the datasheet information for the RT8223B, a member of the RT8223A Main Power Supply Controller family.

Datasheet Summary

Description

The RT8223A/B dual step-down, switch-mode powersupply controller generates logic-supply voltages in battery-powered systems.

The RT8223A/B includes two pulse-width modulation (PWM) controllers fixed at 5V/ 3.3V or adjustable from 2V to 5.5V.

Features

  • 2 linear regulators providing fixed 5V and 3.3V outputs. The linear regulator each provides up to 70mA output current with automatic linear-regulator bootstrapping to the PWM outputs. The RT8223A/B includes on-board power-up sequencing, the power good output, internal softstart, and internal soft-discharge output that prevents negative voltages on shutdown. A constant on-time PWM control scheme operates without sense resistor and provides 100ns response to load transients while maintaining a rel.

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Datasheet preview – RT8223B

Datasheet Details

Part number RT8223B
Manufacturer Richtek
File Size 449.63 KB
Description Main Power Supply Controller
Datasheet download datasheet RT8223B Datasheet
Additional preview pages of the RT8223B datasheet.

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Full PDF Text Transcription

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RT8223A/B High Efficiency, Main Power Supply Controller for Notebook Computers General Description The RT8223A/B dual step-down, switch-mode powersupply controller generates logic-supply voltages in battery-powered systems. The RT8223A/B includes two pulse-width modulation (PWM) controllers fixed at 5V/ 3.3V or adjustable from 2V to 5.5V. This device also features 2 linear regulators providing fixed 5V and 3.3V outputs. The linear regulator each provides up to 70mA output current with automatic linear-regulator bootstrapping to the PWM outputs. The RT8223A/B includes on-board power-up sequencing, the power good output, internal softstart, and internal soft-discharge output that prevents negative voltages on shutdown.
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