Overvoltage protection device with thermal shutdown

The STBP120 device provides overvoltage protection for input voltage up to +28 V. Its low RDS(on) N-channel MOSFET switch protects the systems connected to the OUT pin against failures of the DC power supplies in accordance with the China MII Communications Standard YD/T 1591-2006.

In the event of an input overvoltage condition, the device immediately disconnects the DC power supply by turning off an internal low RDS(on) N-channel MOSFET to prevent damage to protected systems.

In addition, the device also monitors its own junction temperature and switches off the internal MOSFET if the junction temperature exceeds the specified limit.

The device can be controlled by the microcontroller and can also provide status information about fault conditions.

The STBP120 is offered in a small, RoHS-compliant TDFN – 10-lead (2.5 mm x 2 mm) package.

Key Features

  • Certain overvoltage options compliant with the China Communications Standard YD/T 1591- 2006 (overvoltage protection only)
  • IN input ESD withstand voltage up to ±15 kV (air discharge), up to ±8 kV (contact discharge) in typical application circuit with 1 μF input capacitor (±2 kV HBM for standalone device)
  • Small, RoHS compliant 2.5 x 2 mm TDFN – 10-lead package.
  • Enable input (EN)
  • Softstart feature to control the inrush current
  • Input overvoltage protection up to 28 V
  • Low RDS(on) of 90 mΩ
  • Integrated high voltage N-channel MOSFET switch
  • Thermal shutdown protection
  • Fault indication output (FLT)
  • Integrated charge pump

Circuit Diagram

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Technical Documentation

Product Specifications
Description Version Size
DS6152 DS6152: Overvoltage protection device with thermal shutdown 5.1 705 KB
Application Notes
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AN3050 AN3050: STBP120 overvoltage protection device 1.1 902 KB
Technical Notes & Articles
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TN0941 TN0941: Reset and supervisor ICs: frequently asked questions (FAQ) 1.0 328 KB

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Sample & Buy

Part Number Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STBP120DVDK6F TDFN10 2.5x2x0.75 Tape And Reel - - Active 0.49 1000 NEC EAR99 MALAYSIA MORE INFO
STBP120BVDK6F TDFN10 2.5x2x0.75 Tape And Reel - - Active 0.49 1000 NEC EAR99 MALAYSIA MORE INFO
STBP120CVDK6F TDFN10 2.5x2x0.75 Tape And Reel - - Active 0.49 1000 NEC EAR99 MALAYSIA MORE INFO

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STBP120DVDK6F ActiveTDFN10 2.5x2x0.75IndustrialEcopack3 0 0
STBP120BVDK6F ActiveTDFN10 2.5x2x0.75IndustrialEcopack3 0 0
STBP120CVDK6F ActiveTDFN10 2.5x2x0.75IndustrialEcopack3 0 0
STBP120AVDK6F ActiveTDFN10 2.5x2x0.75IndustrialEcopack3 0 0

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.