Overview
The STEF05PUR, produced by STMicroelectronics, is an integrated electronic fuse designed to monitor and protect electronic circuits from overcurrent and overvoltage conditions. Connected in series to a 5 V rail, this device ensures the safety of the circuitry by limiting output current to a predefined safe value during overload conditions and disconnecting the load from the power supply if the anomaly persists. The STEF05PUR features a controlled delay and turn-on time, and it is equipped with a thermal protection circuit that signals any thermal faults through the Fault pin. Unlike mechanical fuses, the STEF05PUR does not degrade after short-circuit or thermal protection interventions and can be reset by recycling the supply voltage or using the Enable pin.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Continuous Current (typ) | 3.6 A | A |
| N-channel On-resistance (typ) | 40 mΩ | mΩ |
| Output Clamp Voltage (typ) | 6.65 V | V |
| Thermal Latch (typ) | 165 °C | °C |
| Operating Junction Temperature | -40 °C to 125 °C | °C |
| Package | DFN10 (3x3 mm) | - |
| Minimum Operating Voltage | 3.1 V | V |
| Positive Power Supply Voltage (steady state) | -0.3 to 10 V | V |
| Storage Temperature Range | -65 to 150 °C | °C |
Key Features
- Enable/Fault functions for controlling the output and signaling thermal faults
- Undervoltage lockout and short-circuit limit
- Overload current limit and controlled output voltage ramp
- Thermal protection circuit with thermal latch at 165 °C
- Uses tiny capacitors for dv/dt control
- No degradation in performance after short-circuit or thermal protection interventions
- Resettable by recycling the supply voltage or using the Enable pin
Applications
- Hard disk drives (HDD)
- Solid state drives (SSD)
- HDD and SSD arrays
- Set-top boxes
- DVD and Blu-ray disc drivers
- Communications equipment and computers/peripherals
Q & A
- What is the primary function of the STEF05PUR?
The STEF05PUR is an integrated electronic fuse designed to protect electronic circuits from overcurrent and overvoltage conditions by limiting output current and disconnecting the load if necessary.
- What is the typical continuous current rating of the STEF05PUR?
The typical continuous current rating is 3.6 A.
- How does the thermal protection circuit work in the STEF05PUR?
The thermal protection circuit signals any thermal faults through the Fault pin and can be reset by recycling the supply voltage or using the Enable pin.
- What is the operating junction temperature range of the STEF05PUR?
The operating junction temperature range is -40 °C to 125 °C.
- What package type is the STEF05PUR available in?
The STEF05PUR is available in a DFN10 (3x3 mm) package.
- Can the STEF05PUR be reset after a short-circuit or thermal protection event?
- What are some common applications of the STEF05PUR?
- How does the Enable/Fault pin function in the STEF05PUR?
- What is the minimum operating voltage for the STEF05PUR?
- Is the STEF05PUR RoHS compliant?
