PWM Controllers
  • SC1102
  • Synchronous Voltage-Mode Controller for Distributed Power-Supply Applications
  • SC1103
  • Asynchronous Voltage-Mode PWM Controller for 12 V Input
  • SC1104A
  • Not Recommended For New Designs
  • SC1104B
  • Simple, Synchronous Voltage-Mode PWM Controller
  • SC1109
  • Synchronous PWM Controller With Dual Low-Dropout Regulator Controllers
  • SC1110
  • Sink and Source DC/DC Controller For Termination Power Supply Applications
  • SC1116
  • Linear FET Controller for DDR Supplies
  • SC1175
  • Low-Power Dual Synchronous DC/DC Controller with Current-Sharing Circuitry
Semtech SC508

Semtech SC508

46V EcoSpeed® DC-DC Buck Controller with Integrated LDO

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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.


  • 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


  • Office automation and computing
  • Networking and telecommunication equipment
  • Point-of-load power supplies and module replacement
  • Automotive applications


  • MLPQ 20-pin 3 x 3(mm)

Order Codes

  • SC508ULTR - Lead-free packaging only. Device is WEEE and RoHS compliant and halogen-free
  • SC508AULTRT - Lead-free packaging only. Device is WEEE and RoHS compliant and halogen-free
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