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 SC451

Semtech SC451

PowerStep IV® Portable IMVP-IV® and IMVP-IV+® Single-Phase Power-Supply Controller

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The complete datasheet for this product is restricted to IMVP licensees only. To request a datasheet, email:


  • IMVP-IV™ and IMVP4+™ compliant single-chip solution
  • On-chip CLK_ENABLE# and IMVP4_PWRGD outputs
  • Backward compatible with SC1479
  • High-speed hysteretic controller
  • Single-phase operation
  • Selectable analog or VID-controlled DeeperSleep setting
  • 6-bit VID programmable output
  • Integrated drivers with soft high-side turn-on
  • Programmable softstart
  • Programmable boot voltage
  • Programmable DeeperSleep voltage
  • Under-voltage lockout on VccA
  • Over-voltage protection on CORE
  • Current limit protection on CORE
  • Thermal protection
  • Power-good flag with blanking during VID or DeeperSleep mode changes
  • Automatic powersave at light load
  • TSSOP-28 and TSSOP-38 package options


  • Low-power notebook and laptop computers
  • Embedded applications



Order Codes

  • SC451ITS38TRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
  • SC451ITSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
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