SC461中文资料SC461,28V EcoSpeed® DC-DC Buck Controller with Integrated LDO数据手册Semtech规格书

描述 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.

特性 Features

·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

应用 Application

·Office automation and computing
·Networking and telecommunication equipment
·Point-of-load power supplies and module replacement