RT8202 - Richtek

RT8202 Single Synchronous Buck Controller

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 “.

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 z z z Applications z z z Notebook Computers CPU Core Supply Chipset/RAM Supply as Low as 0.75V P.