Switching Regulators
  • SC195F
  • 3.5MHz, 500mA Synchronous Step Down DC-DC Regulator
  • SC202F
  • 3.5MHz, 500mA Step-down Regulator with Integrated Inductor
  • SC21150
  • Tiny 1.2A Synchronous Buck Regulator
  • SC21152
  • Tiny 1.2A Synchronous Buck Regulator with Power Good
  • SC21154
  • Tiny 1.2A Synchronous Buck Regulator with Programmable Soft Start
  • SC221
  • 20MHz, 650mA, X-EMI™-Enabled Synchronous Step-Down Regulator
  • SC284A
  • Dual Channel 2.5MHz, 2.0A Synchronous Buck Regulator
  • SC284AQ
  • Dual Channel 2.5MHz, 1.7A Synchronous Buck Regulator
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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