eFuse ( electronic fuse ) for 3.3V and 5V lines

Download datasheet

Order a free sample and buy from our distributors

Sample & Buy
Overview
Tools & Software
Resources
Solutions
Quality & Reliability
Sales Briefcase
eDesignSuite
Get Started
Sample & Buy
Partner products
  • The STEF4S is an integrated electronic fuse optimized for monitoring the output current and the input voltage. It can be connected in series to 3.3 V or 5 V rails, protecting the electronic circuitry on its output from overcurrent and overvoltage. The operating mode (5 V or 3.3 V) can be selected by a dedicated pin. The STEF4S has a controlled turn-on time, adjustable by an external capacitor. 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, the E-fuse limits the output current to a safe value.

    In case of overvoltage on the input, the device clamps the output voltage to a predefined value and protects the load.
    If the anomalous fault condition persists, the internal thermal protection circuit shuts down the device and then automatically attempts to re-supply the load until the fault condition is removed.
    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.

    Key Features

    • Power MOSFET on-resistance (typ.): 40 mΩ
    • Enable function
    • Output clamp voltage (typ.): 5.7 V in 5 V mode, and 3.8 V in 3.3 V mode
    • Undervoltage lockout
    • Short-circuit limit
    • Overload foldback current limit
    • Controlled soft-start
    • Thermal auto-retry
    • Internal sensing FET
    • Operative temp. range: - 40 °C to 85 °C
    • Available in DFN 3x3 10L package
    • Hard disk drives
    • Solid state drives (SSD)
    • Hard disk and SSD arrays
    • Set-top boxes
    • DVD and blu-ray disc drivers

Sample & Buy

Part Number
Package
Packing Type
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
Order from Distributors
Order from ST
STEF4SPUR DFN10 3X3 Tape And Reel
Active
0.954 10000 EAR99 CHINA Check Availability

Distributor availability ofSTEF4SPUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2358 1 Order Now
MOUSER WORLDWIDE 1596 1 Order Now
Farnell Element14 EUROPE 1598 1 Order Now

Distributor reported inventory date: 2019-09-17

Distributor Name

DIGIKEY

Stock

2358

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

1596

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1598

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-17

Get sample

STEF4SPUR

Package

DFN10 3X3

Packing Type

Tape And Reel

Unit Price (US$)

0.954*

Distributor availability ofSTEF4SPUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2358 1 Order Now
MOUSER WORLDWIDE 1596 1 Order Now
Farnell Element14 EUROPE 1598 1 Order Now

Distributor reported inventory date: 2019-09-17

Distributor Name

DIGIKEY

Stock

2358

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

1596

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1598

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-17

Marketing Status

Active

Unit Price (US$)

0.954

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Featured Products

Recommended for you

Related Applications

Audio and Video

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS9933
      Electronic fuse for 3.3 V and 5 V lines
      2.0
      635.35 KB
      PDF
      DS9933

      Electronic fuse for 3.3 V and 5 V lines

Publications and Collaterals

    • Description Version Size Action
      Linear and Switching Voltage Regulators Selection Guide 3.0
      370.88 KB
      PDF

      Linear and Switching Voltage Regulators Selection Guide

    • Description Version Size Action
      electronic Fuse quick Reference Guide 1.0
      2.67 MB
      PDF

      electronic Fuse quick Reference Guide

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEF4SPUR
Active
DFN10 3X3 Industrial Ecopack2

STEF4SPUR

Package:

DFN10 3X3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN10 3X3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) 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.