The RAA214401 is a linear regulator that operates with a very wide input voltage range at a fixed output at 3.3V and up to 150mA of output current. With an ultra low quiescent current, it is suitable for always-on and keep-alive applications. The device operates with a wide input voltage range (4.5V to 40V at 10mA load) with excellent line and load regulation. It has integrated fault protections such as Over-Temperature Shutdown (OTSD) and short-circuit current limit. The output voltage of the device is well regulated across temperature and the entire operating range of the input voltage and load. It is fixed with an internal resistor network between the output pin and ground. The RAA214401 is available in a SOT23 package.


  • Wide input voltage range (4.5V to 40V at 10mA load)
  • Ultra low 3.6μA quiescent current
  • High output voltage accuracy
  • Excellent line and load regulation
  • Stable with 2.2μF – 47μF MLCC output capacitor
  • Integrated fault protections including thermal shutdown and current limit
  • Available in the compact and cost-effective SOT23 package



  • Always-on battery-powered equipment
  • MCU standby power supply
  • Electric meters
  • Laptop computers and tablets
  • Portable modules and appliances


Title language Type Format File Size Date
Datasheets & Errata
star RAA214401 Datasheet Datasheet PDF 904 KB
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
Motor Solution Brochure 日本語, 简体中文 Brochure PDF 4.54 MB

memoryBoards & Kits

Part Number Title Type Company
RTKA214401DR0000BU 150mA, Wide Input Range, Ultra-Low Quiescent Current Linear Regulator Demonstration Board Demonstration Renesas