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RT9221

Richtek Technology
Part Number RT9221
Manufacturer Richtek Technology
Description PROGRAMMABLE SYNCHRONOUS PWM BUCK CONVERTER
Published Oct 26, 2005
Detailed Description RT9221 Programmable Synchronous PWM Buck Converter with 1.5V/2.5V Dual Low Dropout Linear Regulator Controller General...
Datasheet PDF File RT9221 PDF File

RT9221
RT9221

Overview
RT9221 Programmable Synchronous PWM Buck Converter with 1.
5V/2.
5V Dual Low Dropout Linear Regulator Controller General Description 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 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.
The linear section is a low dropout regulator which drives low cost NPN transistors to supply the 1.
5V and 2.
5V regulated output power.
Ordering Information RT9221… … Package type S : SOP-24 Operating temperature range C: Co...


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