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 SC418

Semtech SC418

EcoSpeed® DC-DC Buck Controller with Programmable LDO

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The SC418 is a synchronous EcoSpeed® DC-DC Buck Controller with Programmable LDO 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 programmable LDO in a 3 x 3mm package.


  • Power system
    • Input voltage — 3V to 28V
    • Integrated bootstrap switch
    • Programmable 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/output control
    • Independent control EN for LDO and switcher
    • Programmable VIN UVLO threshold
    • Power good output
    • Selectable power save mode
    • Programmable ultrasonic power save mode
  • Protections
    • Over-voltage/under-voltage
    • TC compensated RDS(ON) sensed current limit
    • Thermal shutdown
    • Smart power save
  • Output capacitor types
    • High ESR — SP, POSCAP, OSCON
    • Ceramic capacitors
  • Package — 3 x 3mm, 20-pin MLPQ
  • Lead-free and halogen free, RoHS and WEEE compliant


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



Order Codes

  • SC418ULTRT: Lead-free, RoHS and WEEE compliant, 3000 pcs. Tape & Reel
  • SC418EVB: SC418 Evaluation Board
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