General Description

The RT8125H PWM controller provides high efficiency,

excellent transient response, and high DC output accuracy

needed for CPU core, I/O, and chipset RAM supplies in

notebook computers.

Richtek Mach ResponseTM technology is specifically

designed for providing 100ns “instant-on” response to

load transients while maintaining a relatively constant

switching frequency.

The RT8125H achieves high efficiency at a reduced cost

by eliminating the current sense resistor found in

traditional current mode PWMs. Efficiency is further

enhanced by its ability to drive very large synchronous

rectifier MOSFETs. The Buck conversion allows this device

to directly step down high voltage batteries at the highest

possible efficiency. The RT8125H provides an 1 high

accuracy 0.8V reference voltage with minimum 1mA

source/sink current for high accuracy output application.

Features

 Richtek Mach ResponseTM Technology

 1 High Accuracy 0.8V Reference

 VCC Input Range : 4.5V to 13.2V

 VOUT Operating Range : 0.3V to 3.3V

 Power Stage Input Range : 1.5V to 24V

 Fixed Operating Frequency : 300kHz

 VIN Detection

 LG_OCSET for Current Limit

 PGOOD Indicator

 Embedded Bootstrap Switch

 High Side Gate Driver Pull Low Resistor (10kΩ)

 Current Limit with Low Side Current Sense Scheme

 Enable Function with Mode Selection

 OVP/UVP/OTP/Pre-OVP/Current Limit

 Shutdown Current <100μA

 RoHS Compliant and Halogen Free

Applications

 Generic DC-DC Power Regulator

 Mother Boards and Desktop Servers

RT8125HGQW属于集成电路（IC） > PMIC - 稳压器 - DC DC 开关式控制器。立绮科技制造生产的RT8125HGQWDC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。