[Richtek]

General Description
The RT9229 is a 4-in-one power controller optimized for high-performance microprocessor and computer applications. The IC integrates two PWM controllers, a linear regulator and a linear controller as well as monitoring and protection functions into a 28-pin SOP package. The first PWM controller regulates the microprocessor core voltage with a synchronous buck converter, while the second PWM controller supplies the 3.3V power with a standard buck converter. The linear regulator provides power for the clock driver circuit and the linear controller regulates
power for the GTL bus.

FEATUREs
4-in-one Regulated Voltages for Microprocessor Core, I/O, Clock, and GTL
Compatible with HIP6019B
Power-Good Output Voltage Monitor

Switching section
5-bit DAC Programmable from 1.3V to 3.5V
±1% DAC Accuracy
Fast Transient Response
Full 0% to 100% Duty Cycle Driver
Fixed 200kHz Switching Frequency
Adaptive Non-overlapping Gate Driver
Over-current Monitor Uses MOSFET RDS(ON)
Over-voltage Protection Uses Lower MOSFET

Linear Section
User-adjustable Linear Regulator Output Voltage
MOSFET or NPN Driving Capability
Ultra Fast Response Speed
Under-voltage Protection
Internal Thermal Shutdown

APPLICATIONs
Full Motherboard Power Regulation for Computer
Low-voltage Distributed Power Supplies