Switching Regulators
  • SC187
  • 4A, 2.2MHz Synchronous Step-Down Regulator with 15 Preset Output Voltages
  • SC195B
  • 3.5MHz, 500mA Synchronous Step Down DC-DC Regulator
  • SC220
  • 20MHz, 650mA, X-EMI™-Enabled Synchronous Step-Down Regulator
  • SC220Q
  • 20MHz, 650mA, X-EMI™-Enabled Synchronous Step-Down Regulator
  • SC2308A
  • 600kHz Step-Up Switching Regulator with 2.2A, 45V Switch
  • SC284
  • Dual Channel 2.5MHz, 1.8A Synchronous Step-Down Regulator
  • SC3102
  • 2A Synchronous Step-Down Regulator
  • SC401B
  • 15A Integrated FET Regulator with Programmable LDO
Semtech SC4525D

Semtech SC4525D

18V, 3A, 350kHz Step-Down Switching Regulator

The SC4525D is a 350kHz constant frequency peak current-mode step-down switching regulator capable of producing 3A output current from an input ranging from 3V to 18V. The SC4525D is suitable for next generation XDSL modems, high-definition TVs and various point of load applications.

To convert your designs from SC4525B, please refer to our

"SC4525A/B to SC4525C/D Design Guide"


  • Input range: 3V to 18V
  • 3A Output Current
  • 350kHz Fixed Switching Frequency
  • Precision 1V Feedback Voltage
  • Peak Current-Mode Control
  • Cycle-by-Cycle Current Limiting
  • Hiccup Overload Protection with Frequency Foldback
  • Soft-Start and Enable
  • Thermal Shutdown
  • Thermally Enhanced 8-pin SOIC Package
  • Fully RoHS and WEEE compliant


  • XDSL and Cable Modems
  • Set Top Boxes
  • Point of Load Applications
  • CPE Equipment
  • DSP Power Supplies
  • LCD and Plasma TVs


  • SOIC-8 EDP

Order Codes

  • SC4525DSETRT: (SOIC-8 EDP) Lead Free, WEEE and RoHS Compliant, Halogen-free, 2,500 pcs, Tape and Reel only.
  • SC4525DEVB: Evaluation Board