STEF12S

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Electronic fuse for 12 V line

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Overview

Product overview

Description

Description

The STEF12S is an integrated electronic fuse optimized to monitor the 12 V DC power lines.

When connected in series to the main power rail, it is able to precisely detect and react to overcurrent and overvoltage conditions.

When an overload condition occurs, the device limits the output current to a safe value defined by the user. If the anomalous overload condition persists, the device goes into an open state, disconnecting the load from the power supply.

In case of overvoltage on the input, the device regulates the output to a preset safe value.

Undervoltage lockout prevents the load from malfunction, keeping the device off if the rail voltage is too low.

The STEF12S features the adjustable turn-on slew-rate, which is useful to keep the in-rush current under control during startup and hot-swap operations.

On the DFN10 package a dedicated pin provides a gate control for an external optional N-channel Power FET, used to implement the reverse current blocking in case of input voltage loss.

The STEF05S is a companion chip for the 5 V rails, useful to implement a complete power rail control in data-storage applications.

  • All features

    • 15 V typical output overvoltage clamp
    • Absolute maximum voltage of 25 V
    • Adjustable current limit
    • Thermal protection
    • Input undervoltage lockout
    • Low inrush current during startup
    • Integrated 40 mΩ Power FET
    • En/fault pin
    • Adjustable slew rate for output voltage
    • Gate control pin for reverse current blocking FET (DFN10 package)
    • TSOT23-8L and DFN10 (3x3 mm) packages
    • Latch (STEF12S) or autoretry (STEF12SA) versions
    • UL2367 Recognized - File N. E468771
    • IEC 62368-1 CB certified

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The current status of a product:
Active: Product is in volume production
Evaluation: Product is under characterization. Limited Engineering samples available
Preview: Product is in design stage
Target: Product is in design feasibility stage.No commitment taken to produce
Proposal: Marketing proposal for customer feedback.No commitment taken to design or produce
NRND: Not Recommended for New Design.Product is in volume production only to support customers ongoing production.Marketing description of the package type.Compliancy of the device with industry requirement domains (IRD)The RoHS status of a product:
ECOPACK 1: Initial grade to identify European RoHS compliant products.
ECOPACK 2: New grade to identify brominated chlorinated and antimony oxide flame retardant free products.
ECOPACK 3: Halogen free RoHS exemptions free products.
(*): ECOPACK 2 version available upon request.
(**): Some versions still existing in ECOPACK 1 or not compliant.Longevity Commitment in yearsLongevity Starting DateThe current status of a product:
Active: Product is in volume production
Evaluation: Product is under characterization. Limited Engineering samples available
Preview: Product is in design stage
Target: Product is in design feasibility stage.No commitment taken to produce
Proposal: Marketing proposal for customer feedback.No commitment taken to design or produce
NRND: Not Recommended for New Design.Product is in volume production only to support customers ongoing production.Budgetary PriceMarketing description of the package type.Storage method used to contain product.Main country of assembly or fabrication of the product.ECCNs are five character alpha-numeric designations used on the Commerce Control List to identify dual-use items for export control purposes. ECCNs are five character alpha-numeric designations used on the Commerce Control List to identify dual-use items for export control purposes.The value as specified by level (minTypMax) of the ambient temperature (in Cel) in which this item was designed to operate.The value as specified by level (minTypMax) of the ambient temperature (in Cel) in which this item was designed to operate.The value as specified by level (minTypMax) of the ambient temperature (in Cel) in which this item was designed to operate.