Switching Regulators
  • SC195F
  • 3.5MHz, 500mA Synchronous Step Down DC-DC Regulator
  • SC202F
  • 3.5MHz, 500mA Step-down Regulator with Integrated Inductor
  • SC21150
  • Tiny 1.2A Synchronous Buck Regulator
  • SC21152
  • Tiny 1.2A Synchronous Buck Regulator with Power Good
  • SC21154
  • Tiny 1.2A Synchronous Buck Regulator with Programmable Soft Start
  • SC221
  • 20MHz, 650mA, X-EMI™-Enabled Synchronous Step-Down Regulator
  • SC284A
  • Dual Channel 2.5MHz, 2.0A Synchronous Buck Regulator
  • SC284AQ
  • Dual Channel 2.5MHz, 1.7A Synchronous Buck Regulator
Semtech SC4501

Semtech SC4501

2 Amp, 2 MHz Boost Switching Regulator with Soft-Start

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The SC4501 is a high-frequency current-mode step-up switching regulator with an integrated 2A power transistor. Its high switching frequency (programmable up to 2MHz) allows the use of tiny surface-mount external passive components. Programmable soft-start eliminates high inrush current during start-up.


  • Low saturation voltage switch: 220mV at 2A
  • Constant switching frequency current-mode control
  • Programmable switching frequency up to 2 MHz
  • Soft start function
  • Input voltage range from 1.4 V to 16 V
  • Output voltage up to 32 V
  • Low shutdown current
  • Adjustable under-voltage lock-out threshold
  • Small low-profile thermally-enhanced packages.


  • Flat screen LCD bias supplies
  • TFT bias supplies
  • XDSL power supplies
  • Medical equipment
  • Digital video cameras
  • Portable devices
  • White LED power supplies



Order Codes

  • SC4501MLTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
  • SC4501MSETRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
  • SC4501EVB: SC4501 Evaluation Board
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