Description

The SC4508A is a low voltage current mode switching regulator controller that drives a P-channel power MOSFET with programmable switching frequency. It can be configured in either buck or buck boost (inverting) con verters. The converters can be operated from 2.7V to 15V input voltage range.

Features

‹Wide input voltage range 2.7V to 15V

‹Programmable output voltage

‹Programmable switching frequency up to 1.5MHz

‹Buck or buck boost (inverting) configuration

‹Current mode control with slope compensation

‹Very low quiescent current in shutdown mode

‹Accessible reference voltage

‹Hiccup mode after 32 cycle-by-cycle OCP

‹4mm x 4mm MLPQ-12 lead free package. This product is fully WEEE and RoHS compliant

Applications

‹Low power point of use converters

‹Single or multiple output low power converters

‹Positive and/or negative output voltage

‹DSL cards

‹Graphic cards

‹I/O cards

‹Negative bias supplies

SC4508A属于集成电路（IC） > PMIC - 稳压器 - DC DC 开关式控制器。Semtech Corporation制造生产的SC4508ADC-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。