Linear Regulators & Controllers
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Semtech SC339

Semtech SC339

Ultra Low Output Voltage Linear FET Controller

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The SC339 is an ultra-low output voltage, linear power supply controller designed to simplify power management for notebook PCs. It is part of Semtech’s Smart LDO™ family of products. The SC339 has a user adjustable output that can be set anywhere between 0.5V and 3.3V using two external resistors.


  • ± 1% Voltage Accuracy Over-Temperature
  • Low Shutdown Current
  • Runs Off 5V Supply
  • Enable Control for the Output
  • Power Good Monitoring and Signaling for the Output
  • Gate Drive from Input Supply Enables Use of
  • N-Channel MOSFET
  • User Selectable Dropout Voltage
  • Under-Voltage Protection for the Output
  • SOT-23 6-pin Surface Mount Package
  • Compatible with Ceramic Capacitors
  • Low Ripple Output
  • Internal 1ms soft-start requires no external components
  • Fully WEEE and RoHS compliant


  • Notebook PCs
  • Desktop Computers
  • Battery Powered Devices
  • Portable Instruments



Order Codes

  • SC339SKTRT: Lead-free, RoHS and WEEE compliant, 2500 pcs. Tape & Reel
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