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 SC1185A

Semtech SC1185A

Programmable Synchronous DC/DC Converter, Dual LDO Controller

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The SC1185 combines a synchronous voltage mode controller with two low-dropout linear regulators providing most of the circuitry necessary to implement three DC/DC converters for powering advanced microprocessors such as Pentium® II .


  • SC1185A provides improved output tolerance over SC1185
  • Synchronous design, enables no-heatsink solution
  • 95% efficiency (switching section)
  • 5-bit DAC for output programmability
  • On-chip power-good function
  • Designed for Intel Pentium® II requirements
  • 1.5 V, 2.5 V @ 1.25% for linear section
  • 1.265 V ± 1.5% reference available
  • 24-lead SO package. Lead free option available. Lead free product is fully WEEE and RoHS compliant.


  • Pentium® II microprocessor supplies
  • Flexible motherboards
  • 1.3 V – 3.5 V microprocessor supplies
  • Programmable triple power supplies



Order Codes

  • SC1185ACSW.TR: 1,000 pcs. Tape & Reel
  • SC1185ACSW.TRT: Lead-Free, RoHS and WEEE Compliant, 1000 pcs. Tape & Reel Only
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