RT8204APQW Datasheet PDF - Richtek

●General Description

●The RT8204A PWM controller provides the 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.

●Features

●• PWM Controller

●   ► 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

●   ► 3V 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

●• LDO Controller

●   ► 1.5% Accuracy Over Line and Load

●   ► Adjustabe Output Voltage down to 0.75V

●   ► Independent Enable and Power Good Indicator

●   ► Drive N-MOSFETs within Rail to Rail Controller Voltage

●   ► MLCC and POSCAP Stable

●• RoHS Compliant and 100% Lead (Pb)-Free

●Applications

●• Notebook Computers

●• CPU Core Supply

●• Chipset/RAM Supply as Low as 0.75V