Hot swap and ideal diode controller for high-redundancy power architectures

Designed for 12 V or 24 V supply rails, the STPM801 ensures the availability of a voltage supply while protecting loads and outputs against high-voltage transients and other disturbances typically found on supply lines.

With integrated hot swap, soft start and ORing protections, the STPM801 protects loads from high-voltage transients, limiting and regulating the output during an overvoltage event, such as load dump, by controlling the voltage drop across an external N-channel MOSFET.

It is especially interesting to use the STPM801 when two supply lines are present and it is important to guarantee the continuity of the supply. In this case, an auxiliary supply line can replace the main line when it is out of order (undervoltage issue or any other malfunction).

The STPM801 also offers a set of features to support applications that need to fulfill functional safety requirements as defined by automotive Safety Integrity Level (ASIL) A-B-C-D depending on application specifications.

Key features of STPM801

10 year longevity


  • Wide input voltage range: 4 V to 65 V
  • Reverse input protection -65 V
  • 2 external N-channel MOSFET pre-drivers
  • Quiescent current < 50 μA if WAKE low
  • Input overvoltage and undervoltage protection
  • Output overcurrent protection
  • Complies with the 16750 AC ripple test requirements (50 Hz - 25 kHz)
  • Adjustable soft start with external capacitor
  • Developed according to ISO 26262 to support ASIL D applications
  • AEC-Q100 qualified

Key applications

  • Zonal/body ECUs
  • High performance compute ECUs
  • Infotainment ECUs
  • Redundant power delivery
  • Dual battery systems

STPM801 news announcement

The STMicroelectronics STPM801 is the market’s first automotive-qualified integrated hot-swap and ideal-diode controller featured for functional-safety applications.

Recommended resources


Automotive high voltage hot swap, soft start and ORing
Evaluation board

The STEVAL-STPM801 is an evaluation board that provides a complete test environment for STPM801, allowing the possibility to work with a dual supply line approach. User can evaluate the hot swap and ORing functions between the two input supplies, taking advantage of STPM801 control.

High voltage hot swap, soft start and ORing
Application note

STPM801 is a controller which operates in conjunction with external back-to-back connected N-channel power MOSFETs, realizing a connection between the input voltage supply line, and the output supply line. The main advantage of integrating STPM801 in the application is the availability of a voltage supply, protected against high voltage transients and all the disturbances that are typically present on the supply lines. 



STPM801 hot swap and ORing IC for high redundancy power architectures
Product presentation

STPM801 offers integrated Hot-Swap, Soft-Start and ORing and reverse input protections. It protects load from high voltage transients, OV and UV, and allows the use of the backup battery.