Electronic fuse for 5 V line
Packing TypeTape And Reel
ROHS Compliance GradeEcopack2
Package NameDFN10 3X3
Key Features
  • Continuous current typ: 3.6 A
  • N-channel on-resistance typ: 40 mΩ
  • Enable/fault functions
  • Output clamp voltage typ: 6.65 V
  • Undervoltage lockout
  • Short-circuit limit
  • Overload current limit
  • Controlled output voltage ramp
  • Thermal latch typ: 165 °C
  • Uses tiny capacitors
  • Operating junction temp. - 40 °C to 125 °C
  • Available in DFN10 (3 x 3 mm).

The STEF05D is an integrated electronic fuse optimized for monitoring output current and input voltage. Connected in series to a 5 V rail, it is capable of protecting the electronic circuitry on its output from overcurrent and overvoltage. The device has a controlled delay and turn-on time. When an overload condition occurs, the STEF05D limits the output current to a predefined safe value. If the anomalous overload condition. persists, it goes into an open state, disconnecting the load from the power supply. If a continuous short-circuit is present on the board, when power is re-applied the E-fuse initially limits the output current to a safe value, and then again goes into an open state.

The device is equipped with a thermal protection circuit. The intervention of the thermal protection is signal led to the board monitoring circuits through a signal on the Fault pin.

Unlike mechanical fuses, which must be physically replaced after a single event, the E-fuse does not degrade in its performance after short-circuit/thermal protection interventions and it is reset either by recycling the supply voltage or using the Enable pin.

The companion chip for 12 V power rails is also available with part number STEF12.

In stock:
Range Unit Price Savings
1 - 9$0.960%
10 - 99$0.8215%
100 - 499$0.5642%
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