Overview

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.

Packaging

  • 20-pin MLPQ

Order Codes

  • SC461ULTRT

PB Free/ROHS

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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

Inventory

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