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
  • 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
  • SC1176
  • Dual Synchronous Voltage-Mode Controller with Current-Sharing Circuitry
Semtech SC1109

Semtech SC1109

Synchronous PWM Controller With Dual Low-Dropout Regulator Controllers

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  • Dual linear controllers
  • LDOs track input voltage within 200 mV (function of the MOSFETs used) until regulation
  • Integrated drivers
  • Power-good signal (SC1109A, SC1109B)
  • Soft start
  • Lossless current sense
  • Programmable over-current limit (SC1109C)
  • Fixed frequency 200 kHz (SC1109A, SC1109C)
  • Fixed frequency 500 kHz (SC1109B)
  • SO-16 package


  • Pentium® III Motherboards
  • Triple power supplies



Order Codes

  • SC1109ACSTR: Package Minimum Tape & Reel Only
  • SC1109ACSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
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