SC461集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關式控制器規(guī)格書PDF中文資料

SC461屬于集成電路（IC）的PMIC-穩(wěn)壓器-DCDC開關式控制器。由Semtech Corporation制造生產(chǎn)的SC461DC-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。

Description

The SC461 is a synchronous EcoSpeed? buck regulator which incorporates Semtech’s advanced, patented adaptive on-time control architecture to provide excellent light-load efficiency and fast transient response. It features an integrated bootstrap switch and a fixed 5V LDO in a 3 x 3(mm) package. The device is highly efficient and uses minimal PCB area.

The SC461 supports using standard capacitor types such as electrolytic or special polymer, in addition to ceramic, at switching frequencies up to 1MHz. The programmable frequency, synchronous operation, and programmable power-save provide high efficiency operation over a wide load range.

Features

■ Power system

? Input voltage — 3V to 28V

? Integrated bootstrap switch

? Fixed 5V LDO output — 200mA

? 1 reference tolerance -40 to +85 °C

? Selectable internal/external bias power supply

? EcoSpeed? architecture with pseudo-fixed frequency adaptive on-time control

■ Logic input and output control

? Independent enable controls for LDO and switcher

? Programmable soft-start time

? Programmable VIN UVLO threshold

? Power Good output

? Selectable power-save mode

■ Protections

? Automatic restart on fault shutdown

? Over-voltage and under-voltage

? TC compensated RDS(ON) sensed current limit

? Thermal shutdown

? Smart power-save

? Pre-bias start-up

■ Capacitor types: SP, POSCAP, OSCON, and ceramic

■ Package — 3 x 3(mm), 20-pin MLPQ

■ Lead-free and halogen-free

■ RoHS and WEEE compliant

Applications

■ Office automation and computing

■ Networking and telecommunication equipment

■ Point-of-load power supplies and module replacement? ? ?