RT9221 Datasheet (Richtek Technology) - PROGRAMMABLE SYNCHRONOUS PWM BUCK CONVERTER

RT9221, PROGRAMMABLE SYNCHRONOUS PWM BUCK CONVERTER

The RT9221 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

RT9221 Features

* z Provides 3 Regulated Voltages z N-MOSFET Driver for High Efficiency Switching Section z Power-good, Over-voltage, and Current- limiting Protection for Switching Section z 1.5V and 2.5V Fixed Output Voltage for Linear Section z Linear Section Uses Low Cost NPN Transistor as Power Device z TTL-compa