描述 Description

The SC2544 is a high performance dual PWM controller. It is designed to convert a wide ranged input voltage down to two independent output rails. The SC2544 support “peel off ” tracking for the two outputs at start up which means the two outputs ramp up together till the one with lower output level reaching the regulation.

特性 Features

·Independent dual-outputs
·“Peel off “start up tracking Independent dual-outputs
·Wide input voltage range: 4.5V~28V
·Adjustable output voltage down to 0.75V
·Flexible power sequencing with enable and power good output
·Synchronous Buck topology with voltage mode control
·Out of phase operation to reduce cost of input capacitor
·10V internal regulator for gate driver to deliver high efficiency
·Programmable switching frequency: 100kHz~300kHz
·Full protection: UVLO, OVP and programmable OCP
·No need for current sense resistor
·Low shutdown current (100nA typical)
·24 lead TSSOP and MLPQ packages
·Fully WEEE and RoHS Compliant

應用 Application

·Systems with 4.5V~28V input
·LCDTV and PDPTV
·Network and telecom systems

簡介

SC2544屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關式控制器。由制造生產(chǎn)的SC2544DC-DC 開關控制器PMIC（電源管理集成電路）DC 到 DC 開關式控制器是用于高效率電路的穩(wěn)壓 IC，其配置為生成高于（突升或步升）或低于（突降或步降）輸入電源的輸出電源電壓。其他拓撲結構可能包括：降壓-升壓、反激、正激、Cuk、SEPIC、全橋、半橋和推挽式。這些器件不同于需要最小電壓并“燒盡”多余電壓的線性穩(wěn)壓器。