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500mA Low Dropout CMOS Linear Regulator with Adjustable Output Evaluation Board



  • Output voltage range of 1.25V to 9V
  • 2.0% adjust pin voltage accuracy (25°C)
  • Low dropout voltage: 250MV@ 500mA (typ. 5V out)
  • Wide input voltage range (2.7V to 10V)
  • Precision (trimmed) bandgap reference
  • Guaranteed specs for -40°C to +125°C
  • 1µ A off-state quiescent current
  • Thermal overload protection
  • Foldback current limiting
  • SOT-223 and 6-Lead LLP packages
  • Enable pin (LP38693-ADJ)


  • Hard Disk Drives
  • Notebook Computers
  • Battery Powered Devices
  • Portable Instrumentation


Texas Instruments  LP38693-ADJEV

The LP38693SD-ADJ is a 500mA low-dropout linear regulator whose output voltage can be externally set to any valuebetween 1.25V and 9V using two resistors. The output voltage on this evaluation board is pre-set to 3.30V. This application note gives information about the evaluation board supplied to demonstrate the function of this part.