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 SC2643VX

Semtech SC2643VX

Combi-Sense™ Multi-Platform Multi-Phase PWM Controller

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Obsolete - this device is no longer available. Datasheet is for information purposes only.


  • VRD/VRM 10.X, VRM 9.X, and K-8 compliant
  • Core voltage set point accuracy 0.5%
  • Combi-Sense™ current-mode control
  • Intrinsic phase current matching
  • Fast transient responses
  • Active droop with temperature compensation to meet load line slope
  • Support VID-on-fly with 5-bit or 6-bit VID
  • Enable function for power sequencing
  • Cycle-by-cycle peak current limit
  • Intelligent over-current shut-down
  • Over-voltage protection when using Semtech Combi-Sense™ driver
  • Under-voltage protection built in
  • External programmable soft-start
  • Externally programmable switching frequency (up to 2.8 MHz output voltage ripple frequency)
  • 2-phase, 3-phase, or 4-phase configurations
  • 24-pin SOIC or TSSOP package


  • Voltage regulator VRD/VRM 10.X
  • Voltage regulator VRM 9.X
  • Voltage regulator K-8
  • High-current, low-voltage step-down DC/DC converters



Order Codes

  • SC2643VXTSTR: Package Minimum Tape & Reel Only
  • SC2643VXTSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
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