Description

The SC508/SC508A 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 SC508A is available for automotive applications and is qualified to AEC-Q100.

Features

■ Power system

• Input voltage — 4.5V to 46V

• 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 control EN for LDO and switcher

• Programmable soft-start time

• Programmable VIN UVLO threshold

• Power Good output

• Selectable power-save mode

• Programmable ultrasonic 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

■ AEC-Q100 Qualified available in SC508A

Applications

■ Office automation and computing

■ Networking and telecommunication equipment

■ Point-of-load power supplies and module replacement

■ Automotive applications

SC508A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SC508ADC-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。