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RT8202B - Single Synchronous Buck Controller

This page provides the datasheet information for the RT8202B, a member of the RT8202 Single Synchronous Buck Controller family.

Datasheet Summary

Description

The RT8202/A/B PWM controller provides high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high voltage batteries to generate low voltage CPU core, I/O, and chipset RAM supplies in notebook computers.

Features

  • z z Ultra-High Efficiency Resistor Programmable Current Limit by Low Side RDS(ON) Sense (Lossless Limit) or Sense Resistor (High Accuracy) Quick Load Step Response within 100ns 1% VOUT Accuracy over Line and Load Adjustable 0.75V to 3.3V Output Range 4.5V to 26V Battery Input Range Resistor Programmable Frequency Over/Under Voltage Protection 2 Steps Current Limit During Soft-Start Drives Large Synchronous-Rectifier FETs Power Good Indicator RoHS Compliant and 100% Lead (Pb)-Free z z z z z z z.

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Datasheet preview – RT8202B

Datasheet Details

Part number RT8202B
Manufacturer Richtek
File Size 326.32 KB
Description Single Synchronous Buck Controller
Datasheet download datasheet RT8202B Datasheet
Additional preview pages of the RT8202B datasheet.

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Full PDF Text Transcription

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RT8202/A/B Single Synchronous Buck Controller General Description The RT8202/A/B PWM controller provides high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high voltage batteries to generate low voltage CPU core, I/O, and chipset RAM supplies in notebook computers. The constant on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns “instant-on” response to load transients while maintaining a relatively constant switching frequency. The RT8202/A/B achieves high efficiency at a reduced cost by eliminating the current sense resistor found in traditional current mode PWMs. Efficiency is further enhanced by its ability to drive very large synchronous rectifier MOSFETs.
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