Switching Regulators
  • SC187
    • 4A, 2.2MHz Synchronous Step-Down Regulator with 15 Preset Output Voltages
  • 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
  • SC402B
    • 10A EcoSpeed® Integrated FET Regulator with Programmable LDO
Semtech SC4503

Semtech SC4503

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

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.

Features


  • 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

Applications


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

Packaging

TSOT-23

Order Codes

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