Description
The SC402B is a stand-alone synchronous EcoSpeed® buck power supply which incorporates Semtech’s advanced patented adaptive on-time control architecture. This provides excellent light-load efficiency and fast transient response. It features integrated power MOSFETs, a boot strap switch, and a programmable LDO in a 5x5mm package. The device is highly efficient and uses minimal PCB area. The SC402B has the same package and pin configuration as the entire SC40x series for compatibility.

FEATUREs
Power System
• Input voltage — 3V to 28V
• Bias voltage — 3V to 5.5V LDO or external
• Up to 96% peak efficiency
• Integrated bootstrap switch
• Programmable LDO output — 200mA
• Reference tolerance — 1% TJ= -40 to +125 °C
• Programmable soft start time
Logic Input/Output Control
• Independent EN controls for LDO and switcher
• Programmable VIN UVLO threshold
• Power good output
• Selectable PSAVE or FCM mode
Protection
• Over-voltage and under-voltage
• TC compensated RDS(ON) sensed current limit
• Thermal Shutdown
Output Capacitor Types
• High ESR — SP, POSCAP, OSCON
• Ceramic capacitors
Package
• Lead-free package — 5x5mm, 32-Pin MLPQ
• RoHS/WEEE compliant and Halogen free

APPLICATIONs
Networking and telecommunication equipment
Printers, DSL, and STB applications
Embedded systems and power supply modules
Point of load power supplies