SC419集成电路（IC）的PMIC-稳压器-DCDC开关式控制器规格书PDF中文资料

SC419属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由Semtech Corporation制造生产的SC419DC-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。

Description

The SC419 is a synchronous buck power supply controller. It features a bootstrap switch in a space-saving MLPQ- 3 x 3mm 20-pin package. The device is highly efficient and uses minimal PCB area. It uses pseudo-fixed frequency adaptive on-time operation to provide fast transient response.

The SC419 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

• 1 reference tolerance -40 to +85 °C

• EcoSpeedTM architecture with pseudo-fixed

frequency adaptive on-time control

• Internal soft-start and soft-shutdown at output

• SmartDriveTM

■ Logic input/output control

• Independent control EN for LDO and switcher

• Programmable VIN UVLO threshold

• Power good output

• Selectable power save mode

• Programmable ultrasonic power save mode

■ Protections

• Over-voltage/under-voltage

• TC compensated RDS(ON) sensed current limit

• Thermal shutdown

• Smart power save

■ Output capacitor types

• High ESR — SP, POSCAP, OSCON

• Ceramic capacitors

■ Package — 3 x 3mm, 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