RT9232B中文资料Programmable Frequency Synchronous Buck PWM Controller数据手册Richtek规格书

描述 Description

The RT9232B is a single-phase synchronous buck PWM DC/DC converter controller designed to drive two N-MOSFETs. It provides a highly accurate, programmable output voltage precisely regulated to low voltage requirement with an internal 0.8V ± 1% reference.



The RT9232B uses an external compensated, single feedback loop voltage mode PWM control for fast transient response. An oscillator with Programmable frequency (50kHz to 800kHz) reduces the external inductor and capacitor component size for saving PCB board area.



The RT9232B provides fast transient response to satisfy high current output applications (up to 25A) while minimizing external components. It is suitable for high-performance graphic processors, DDR and VTT power.



The RT9232B integrates complete protect functions such as Soft Start, Output Enable, UVLO(under-voltage lockout) and OCP into a small 14-pin package.

特性 Features

•Single IC Supply Voltage : 12V
•Operate from 12V, 5V or 3.3V Input
•Adaptive Non-Overlapping Gate Drivers
•External Programmable Soft Start
•Provide Over Current Protection by Sensing MOSFET RDS(ON)
•Drives Two N-MOSFET
•Fast Transient Response
•RoHS Compliant and 100% Lead (Pb)-Free

应用 Application

• System (Graphic, MB) with 12V Power.
•   3.3V to 12V Input DC/DC Regulators
•   Low Voltage Distributed Power Supplies