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STEF4S - Electronic fuse

General Description

The STEF4S is an integrated electronic fuse optimized for monitoring the output current and the input voltage.

It can be connected in series to 3.3 V or 5 V rails, protecting the electronic circuitry on its output from overcurrent and overvoltage.

Key Features

  • Power MOSFET on-resistance (typ. ): 40 mΩ.
  • Enable function.
  • Output clamp voltage (typ. ): 5.7 V in 5 V mode, and 3.8 V in 3.3 V mode.
  • Undervoltage lockout.
  • Short-circuit limit.
  • Overload foldback current limit.
  • Controlled soft-start.
  • Thermal auto-retry.
  • Internal sensing FET.
  • Operative temp. range: - 40 °C to 85 °C.
  • Available in DFN 3x3 10L package.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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STEF4S Electronic fuse for 3.3 V and 5 V lines ')1[/ Features • Power MOSFET on-resistance (typ.): 40 mΩ • Enable function • Output clamp voltage (typ.): 5.7 V in 5 V mode, and 3.8 V in 3.3 V mode • Undervoltage lockout • Short-circuit limit • Overload foldback current limit • Controlled soft-start • Thermal auto-retry • Internal sensing FET • Operative temp. range: - 40 °C to 85 °C • Available in DFN 3x3 10L package Description The STEF4S is an integrated electronic fuse optimized for monitoring the output current and the input voltage. It can be connected in series to 3.3 V or 5 V rails, protecting the electronic circuitry on its output from overcurrent and overvoltage. The operating mode (5 V or 3.3 V) can be selected by a dedicated pin.