Products
Power Management
Semtech SC641
EcoSpeed® DC-DC Buck Controller with Integrated LDO
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. 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.
Overview
Features
- Power system
- 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
Applications
- Office automation and computing
- Networking and telecommunication equipment
- Point-of-load power supplies and module replacement
Packaging
- 20-pin MLPQ
Order Codes
- SC461ULTRT
- 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
- Office automation and computing
- Networking and telecommunication equipment
- Point-of-load power supplies and module replacement
Packaging
- 20-pin MLPQ
Order Codes
- SC461ULTRT
- SC461ULTRT
Diagrams and Specs
Datasheets and Resources
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