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.
- 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).
Discover our range of eFuses (electronic fuses) for a wide range of applications.
EDA Symbols, Footprints and 3D Models
STMicroelectronics - STEF05D
Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.
Quality and Reliability
|Part Number||Marketing Status||Package||Grade||RoHS Compliance Grade||Material Declaration**|
(**) 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.
Sample & Buy
|Part Number||Order from distributors||Order from ST||Marketing Status||ECCN (US)||ECCN (EU)||Packing Type||Package||Temperature (°C)||Country of Origin||Budgetary Price (US$)*/Qty|
|STEF05DPUR|| distributors |
Distributor availability of STEF05DPUR
Distributor reported inventory date:
| Buy from Distributor || |
|EAR99||NEC||Tape and Reel||DFN10 3X3||-||-||CHINA|| |
Tape and Reel
Operating Temperature (°C)
Country of Origin:
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors