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
  • SC221
  • 20MHz, 650mA, X-EMI™-Enabled Synchronous Step-Down Regulator
  • SC284AQ
  • Dual Channel 2.5MHz, 1.7A Synchronous Buck Regulator
  • TS13101
  • Galvanic Isolated Latching 60V Power Load Switch
  • TS30011
  • High Efficiency 1A Current-Mode Synchronous Buck DC/DC Converter, 1MHz
Semtech SC4503

Semtech SC4503

1.3MHz Step-Up Switching Regulator with 1.4A Switch in ThinSOT

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The SC4503 is a 1.3MHz current-mode step-up switching regulator with an integrated 1.4A power transistor. Its high switching frequency allows the use of tiny surface-mount external passive components.


  • Low Saturation Voltage Switch: 260mV at 1.4A
  • 1.3 MHz Constant Switching Frequency
  • Peak Current-mode Control
  • Internal Compensation
  • Programmable Soft-Start
  • Input Voltage Range From 2.5V to 20V
  • Output Voltage up to 27V
  • Uses Small Inductors and Ceramic Capacitors
  • Low Shutdown Current (< 1μA)
  • Low Profile 5-Lead TSOT-23 and 8-Lead 2x2mm MLPD-W packages
  • Fully WEEE and RoHS Compliant


  • Local DC-DC Converters
  • TFT Bias Supplies
  • XDSL Power Supplies
  • Medical Equipment
  • Digital Cameras
  • Portable Devices
  • White LED Drivers



Order Codes

  • SC4503TSKTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
  • SC4503EVB: SC4503 Evaluation Board
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