General Description
The RT9227A 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