Datasheet Summary
5-Bit Programmable Synchronous PWM Buck Converter Controller and Output Voltage Monitor
General Description
The RT9224 is a high speed switching controller designed for use in synchronous DC/DC buck converter for modern CPUs. The regulated output voltage is digitally programmable from 1.3V to 3.5V by a 5-bit DAC which provides initial accuracy of ±1%. The RT9224 drives two external N-Channel MOSFETs, providing high efficiency and eliminating the need for high cost P-Channel devices. It senses the output current across the on-resistance of the upper N-Channel MOSFET and provides an adjustable current limit without external sense resistor. RT9224 monitors the output voltage and...