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 SC2646B

Semtech SC2646B

2, 3 or 4 Phase Combi-Sense™ PWM Controller

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


  • VRD/VRM10.X compliant
  • Core voltage set point accuracy 0.5%
  • Combi-Sense™ current mode control
  • Intrinsic phase current matching
  • Fast transient responses
  • Active droop to meet load line slope
  • Enable function for power sequencing
  • Cycle-by-cycle peak current limit
  • Intelligent over-current shutdown
  • Over-voltage protection when using Semtech Combi-Sense™ driver SC1211
  • Under-voltage protection built in
  • External programmable soft start
  • Externally programmable switching frequency
  • 2, 3, or 4-phase configurations
  • 24-pin TSSOP package


  • Voltage regulator VRD/VRM10.X
  • Voltage regulation modules
  • High-current, low-voltage step-down DC/DC converters



Order Codes

  • SC2646BTSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
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