Description

The SC1175 is a versatile 2 phase, synchronous, voltage mode PWM controller that may be used in two distinct ways. First, the SC1175 is ideal for applications where point of use output power exceeds any single input power budget. Alternatively, the SC1175 can be used as a dual switcher. The SC1175 features a temperature compensated voltage reference, over current protection with 50 fold-back and internal level-shifted, high-side drive circuitry.

Features

◆ 300kHz fixed frequency operation

◆ Soft Start and Enable function

◆ Power Good output provided

◆ Over current protection with 50 fold-back

◆ Phase-shifted switchers minimize ripple

◆ High efficiency operation, >90

◆ Programmable output(s) as low as 1.25V

◆ Industrial temperature range

◆ 20 pin SOIC or TSSOP package

Two Phase, Current Sharing Controller

◆ Flexible, same or separate VIN

◆ Programmable current sharing

◆ Combined current limit with fold-back

◆ 2 phases operating opposed for ripple reduction

◆ Thermal distribution via multi-phase output

Two Independent PWM Controllers

◆ Flexible, same or separate VIN

◆ Independent control for each channel

◆ Independent and separate current limit

◆ 2 phases operating opposed for ripple reduction (if same VIN used)

Applications

◆ Graphics cards

◆ DDR Memory

◆ Peripheral add-in card

◆ SSTL Termination

◆ Dual-Phase power supply

◆ Power supplies requiring two outputs

SC1175屬于集成電路（IC） > PMIC - 穩(wěn)壓器 - DC DC 開關式控制器。Semtech Corporation制造生產的SC1175DC-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。