eFuse ( electronic fuse ) for 3.3 V line

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  • 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.

    Key Features

    • Continuous current typ.: 3.6 A (DFN), 2.5 A (Flip Chip)
    • N-channel on resistance (typ): 40 mΩ (DFN), 25 mΩ (Flip Chip)
    • Enable/Fault functions
    • Output clamp voltage (typ): 4.5 V
    • Undervoltage lockout
    • Short-circuit limit
    • Overload current limit
    • Controlled output voltage ramp
    • Thermal latch (typ): 160 °C
    • Uses tiny capacitors
    • Latching and auto-retry versions
    • Operative junction temp. - 40 °C to 125 °C
    • Available in DFN10 3x3 and Flip Chip 9 bumps

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STEF033AJR Flip-Chip 9 Tape And Reel
Active
- EAR99 CHINA Check Availability

Distributor availability ofSTEF033AJR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5000 1 Order Now
ARROW EUROPE 5000 0 Order Now
MOUSER WORLDWIDE 4950 1 Order Now

Distributor reported inventory date: 2019-10-16

Distributor Name

DIGIKEY

Stock

5000

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

5000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

4950

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-10-16

Buy now
STEF033PUR DFN10 3X3 Tape And Reel
Active
0.596 10000 EAR99 CHINA Check Availability

Distributor availability ofSTEF033PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 974 1 Order Now
Farnell Element14 EUROPE 311 1 Order Now

Distributor reported inventory date: 2019-10-16

Distributor Name

DIGIKEY

Stock

974

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

311

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-10-16

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STEF033JR Flip-Chip 9 Tape And Reel
Active
- EAR99 CHINA Check Availability

Distributor availability ofSTEF033JR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2000 1 Order Now
ARROW EUROPE 5000 0 Order Now
MOUSER WORLDWIDE 2000 1 Order Now

Distributor reported inventory date: 2019-10-16

Distributor Name

DIGIKEY

Stock

2000

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

5000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

2000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-10-16

Buy now
STEF033APUR DFN10 3X3 Tape And Reel
Active
0.596 10000 EAR99 CHINA No availability of distributors reported, please contact our sales office Buy now

STEF033AJR

Package

Flip-Chip 9

Packing Type

Tape And Reel

Unit Price (US$)

*

Distributor availability ofSTEF033AJR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5000 1 Order Now
ARROW EUROPE 5000 0 Order Now
MOUSER WORLDWIDE 4950 1 Order Now

Distributor reported inventory date: 2019-10-16

Distributor Name

DIGIKEY

Stock

5000

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

5000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

4950

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-10-16

Marketing Status

Active

Unit Price (US$)

-

Quantity

-

ECCN (US)

EAR99

Country of Origin

CHINA

STEF033PUR

Package

DFN10 3X3

Packing Type

Tape And Reel

Unit Price (US$)

0.596*

Distributor availability ofSTEF033PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 974 1 Order Now
Farnell Element14 EUROPE 311 1 Order Now

Distributor reported inventory date: 2019-10-16

Distributor Name

DIGIKEY

Stock

974

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

311

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-10-16

Marketing Status

Active

Unit Price (US$)

0.596

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

STEF033JR

Package

Flip-Chip 9

Packing Type

Tape And Reel

Unit Price (US$)

*

Distributor availability ofSTEF033JR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2000 1 Order Now
ARROW EUROPE 5000 0 Order Now
MOUSER WORLDWIDE 2000 1 Order Now

Distributor reported inventory date: 2019-10-16

Distributor Name

DIGIKEY

Stock

2000

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

5000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

2000

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-10-16

Marketing Status

Active

Unit Price (US$)

-

Quantity

-

ECCN (US)

EAR99

Country of Origin

CHINA

STEF033APUR

Package

DFN10 3X3

Packing Type

Tape And Reel

Unit Price (US$)

0.596*

Marketing Status

Active

Unit Price (US$)

0.596

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

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      Electronic fuse for 3.3 V line
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      Electronic fuse for 3.3 V line

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Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEF033AJR
Active
Flip-Chip 9 Industrial Ecopack2
STEF033APUR
Active
DFN10 3X3 Industrial Ecopack2
STEF033JR
Active
Flip-Chip 9 Industrial Ecopack2
STEF033PUR
Active
DFN10 3X3 Industrial Ecopack2

STEF033AJR

Package:

Flip-Chip 9

Material Declaration**:

Marketing Status

Active

Package

Flip-Chip 9

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STEF033APUR

Package:

DFN10 3X3

Material Declaration**:

Marketing Status

Active

Package

DFN10 3X3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STEF033JR

Package:

Flip-Chip 9

Material Declaration**:

Marketing Status

Active

Package

Flip-Chip 9

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STEF033PUR

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.