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STEF05PUR Scheda tecnica(PDF) 1 Page - STMicroelectronics |
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STEF05PUR Scheda tecnica(HTML) 1 Page - STMicroelectronics |
1 / 20 page This is information on a product in full production. March 2012 Doc ID 019055 Rev 4 1/20 20 STEF05 Electronic fuse for 5 V line Datasheet − production data Features ■ Continuous current (typ): 3.6 A ■ N-channel on-resistance (typ): 40 m Ω ■ 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 (3x3 mm) package Applications ■ Hard disk drives ■ Solid state drives (SSD) ■ Hard disk and SSD arrays ■ Set-top boxes ■ DVD and Blu-ray disc drivers Description The STEF05 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 STEF05 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 signalled 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. DFN10 (3x3 mm) Table 1. Device summary Order code Package Packaging STEF05PUR DFN10 (3x3 mm) Tape and reel www.st.com |
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