Click to expand full text
RT9222
Programmable Synchronous PWM Buck Converter with Dual Adjustable Low Dropout Linear Regulator Controller
General Description
The RT9222 integrates a PWM controller and two low-dropout linear regulators into a single chip. The PWM controller provides the CPU core voltage controlled by a 5-bit DAC and the linear section regulates power for GTL bus, clock driver or other circuits on motherboards. The PWM controller provides an adjustable Intel-compatible 1.3V~3.5V output voltage. The synchronous N-MOSFET driver with 200 KHz switching frequency optimizes the efficiency, device size, and cost built-in over–voltage and current-limiting protection prevent the CPU from damage. Power-good signal is sent when the core voltage is within ±10% of the setting point.
RT9222 Datasheet
