●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
