Description
The SC403B is a stand-alone synchronous EcoSpeed® buck power supply which incorporates Semtech’s advanced patented adaptive on-time control architecture. It 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.
FEATUREs
Power System:
Input voltage — 3V to 28V
Internal or external bias voltage — 3V to 5.5V
Reference Voltage — 600mV
Integrated bootstrap switch
Programmable LDO output — 200mA
1% reference tolerance -40 to +85 °C
EcoSpeed® architecture with pseudo-fixed frequency adaptive on-time control
Logic Input/Output Control:
Independent control EN for LDO and switcher
Programmable VIN UVLO threshold
Power good output
Selectable power save mode
Programmable soft start time
Protections:
Over-voltage and under-voltage
TC compensated RDS(ON) sensed current limit
Thermal shutdown
Any ESR — SP, POSCAP, OSCON, and ceramic capacitors
Package:
Lead-free package — 5x5mm, 32-pin MLPQ
Fully RoHS/WEEE compliant and halogen-free
APPLICATIONs
Office automation and computing
Networking and telecommunication equipment
Point of load power supplies and module replacement