The STEF033 is an integrated electronic fuse optimized for monitoring output current and the input voltage. Connected in series to the 3.3 V rail, it is able to protect the electronic circuitry on its output from overcurrent and overvoltage. The STEF033 has controlled delay and turn-on time. When an overload condition occurs, the device 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 the power is re-applied the E-fuse initially limits the output current to a safe value and then goes again into the open state. The voltage clamping circuit prevents the output voltage from exceeding a fixed value, if the input voltage goes beyond this threshold. The device is equipped with a thermal protection circuit. Intervention of thermal protection is signaled to the board-monitoring circuits through an appropriate 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 performances following short-circuit/thermal protection intervention and is reset either by re-cycling the supply voltage or using the appropriate Enable pin. The STEF033 is also available in an auto-retry version; in case of thermal fault it automatically attempts to re-apply power to the load when the die temperature returns to a safe value.
|Part Number||Package||Packing Type||Marketing Status||Unit Price (US$) *||Quantity||ECCN (US)||Country of Origin||More info||Order from ST||Order from Distributors|
|STEF033AJR||Flip-Chip 9||Tape And Reel||Active : Product is in volume production||-||1000||EAR99||CHINA||MORE INFO||No availability reported, please contact our Sales office|
|STEF033PUR||DFN10 3X3||Tape And Reel||Active : Product is in volume production||0.596||1000||EAR99||CHINA||MORE INFO||Free Sample Add to cart||DISTRIBUTOR AVAILABILITY|
|STEF033JR||Flip-Chip 9||Tape And Reel||Active : Product is in volume production||-||1000||EAR99||CHINA||MORE INFO||DISTRIBUTOR AVAILABILITY|
|STEF033APUR||DFN10 3X3||Tape And Reel||Active : Product is in volume production||0.596||1000||EAR99||CHINA||MORE INFO||Buy Direct Add to cart||No availability reported, please contact our Sales office|
|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.