General Description
The RT9228 is a 3-in-one power controller optimized for high-performance microprocessor and computer applications. The IC integrates a synchronous buck PWM controller, a linear regulator, and a linear controller as well as monitoring and protection functions into a 24-pin SOP package. The PWM controller regulates the microprocessor core voltage. The linear regulator provides power for the clock driver circuit and the linear controller regulates power for the GTL bus.

FEATUREs
3-in-one Regulated Voltages for Microprocessor Core, Clock, and GTL
Compatible with HIP6016
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
Fixed Linear Regulator Output Voltage
MOSFET or NPN Driving Capability
Ultra Fast Response Speed
Under-Voltage Protection
Internal Thermal Shutdown
RoHS Compliant and 100% Lead (Pb)-Free

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