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 SC419

Semtech SC419

Single Phase DC-DC Converter with Integrated Boost Diode

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The SC419 is a synchronous buck power supply controller. It features a bootstrap switch in a space-saving MLPQ- 3x3mm 20-pin package. The device is highly effi cient and uses minimal PCB area. It uses pseudo-fi xed frequency adaptive on-time operation to provide fast transient response.


  • Input voltage — 3V to 28V
  • Integrated bootstrap switch
  • Smart power-save protection
  • TC compensated RDS(ON)
  • Pseudo-fi xed frequency adaptive on-time control
  • Designed for use with ceramic capacitors
  • Programmable VIN UVLO threshold
  • Enable input
  • Selectable power-save mode
  • Programmable ultra-sonic power-save
  • Internal soft-start and soft-shutdown at output
  • Internal reference — 1% tolerance
  • Over-voltage/under-voltage fault protection
  • Power good output
  • SmartDrive™
  • Lead-free 3x3mm, 20-Pin MLPQ package
  • Fully WEEE and RoHS compliant


  • Notebook, desktop, tablet, and server computers
  • Networking and telecommunication equipment
  • Printers, DSL, and STB applications
  • Embedded applications
  • Power supply modules
  • Point of load power supplies



Order Codes

  • SC419ULTRT: Lead-free, RoHS and WEEE compliant, 3000 pcs. Tape & Reel
  • SC419EVBL: SC419 Evaluation Board
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