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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