RT9222 is Programmable Synchronous PWM Buck Converter manufactured by Richtek.
| Part Number | Description |
|---|---|
| RT9221 | Programmable Synchronous PWM Buck Converter |
| RT9226 | PWM Step-down DC/DC Converter Controller |
| RT9226B | Synchronous PWM Step-Down DC/DC Converter Controller |
| RT9227A | Advanced PWM and Dual Fixed Linear Power Controller |
| RT9228 | Advanced PWM and Dual Fixed Linear Power Controller |
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-patible 1.3V~3.5V output voltage.
