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 SC4521

Semtech SC4521

3A Step-Down Switching Regulator with Programmable Soft Start

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The SC4521 is a current mode switching regulator with an integrated switch, operating at 600kHz with programmable soft start and enable functions.


  • Wide operating voltage range: 4.4V to 24V
  • Integrated 3 Amp switch
  • 600kHz frequency of operation
  • Programmable soft start function
  • Current mode control
  • Precision enable threshold
  • SO-8 EDP Lead-free package, fully WEEE and RoHS compliant


  • XDSL modems
  • CPE equipment
  • DC-DC point of load applications
  • Portable equipment
  • Digtial consumer electronics



Order Codes

  • SC4521SETRT: Lead-free, RoHS and WEEE compliant, 2500 pcs. Tape & Reel
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