The RAA223012 is a universal input AC/DC switching buck regulator with ultra-low standby power that  features a 700V integrated MOSFET capable of delivering up to 2.5W output power. It supports output voltage as low as 3.3V.

The RAA223012 combines constant off-time control for heavy load and Pulse Frequency Modulation (PFM) for light-load operation. Constant off-time controls switching frequency above the audible frequency of approximately 50kHz. PFM eliminates any potential audible noises while offering  superior light-load efficiency and ultra-low power consumption (< 10mW at no load). Efficiency is achieved up to 75%. The built-in frequency dithering further reduces the EMI noise spectrum.

The RAA223012 also features input brownout protection that prevents input circuitry from the overcurrent at low input voltage, and hiccup protections for output fault conditions such as  short-circuit, overload, and open feedback.

The RAA223012 is available in a small 5 Ld TSOT23 and 8 Ld SOIC packages.


  • Ultra low standby power (< 10mW)
  • No audible noise
  • Low quiescent current (< 100μA)
  • Output voltage as low as 3.3V
  • Low EMI with frequency dithering
  • 5 Ld TSOT23 and 8 Ld SOIC package options
  • Programmable PFM allows optimization of COUT for various standby power requirements
  • Protection features: Short-Circuit Protection (SCP), Overload Protection (OLP), Open Feedback Protection, and Over-Temperature Protection (OTP).


  • Home appliances
  • Home automation, IoT, and sensors
  • Metering and Industry control
  • Bias power

Product Options

Part Number Part Status Pkg. Type Carrier Type Buy Sample
Active SOICN Tube
Active SOICN Reel
Active SOICN Reel
Active SOT23 Reel
Active SOT23 Reel

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
RAA223012 Datasheet Datasheet PDF 2.85 MB