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  • 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.

    Key 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

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STMicroelectronics - STEF12S

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEF12SAGR
Preview
TSOT 8L Industrial Ecopack2
STEF12SAPUR
Active
DFN10 3X3 Industrial Ecopack2
STEF12SGR
Active
TSOT 8L Industrial Ecopack2
STEF12SPUR
Active
DFN10 3X3 Industrial Ecopack2

STEF12SAGR

Package:

TSOT 8L

Material Declaration**:

Marketing Status

Preview

Package

TSOT 8L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STEF12SAPUR

Package:

DFN10 3X3

Material Declaration**:

Marketing Status

Active

Package

DFN10 3X3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STEF12SGR

Package:

TSOT 8L

Material Declaration**:

Marketing Status

Active

Package

TSOT 8L

Grade

Industrial

RoHS Compliance Grade

Ecopack2

STEF12SPUR

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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
STEF12SPUR No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape And Reel DFN10 3X3 -40 125 CHINA 0.596 / 1k
STEF12SAPUR No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape And Reel DFN10 3X3 -40 125 CHINA 0.596 / 1k
STEF12SGR No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape And Reel TSOT 8L -40 125 MALAYSIA 0.576 / 1k
STEF12SAGR No availability of distributors reported, please contact our sales office
Preview
EAR99 NEC Tape And Reel TSOT 8L -40 125 MALAYSIA

STEF12SPUR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.596 / 1k

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN10 3X3

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.596 / 1k

Country of Origin

CHINA

STEF12SAPUR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.596 / 1k

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN10 3X3

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.596 / 1k

Country of Origin

CHINA

STEF12SGR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.576 / 1k

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

TSOT 8L

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.576 / 1k

Country of Origin

MALAYSIA

STEF12SAGR

Marketing Status

Preview

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

TSOT 8L

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

Country of Origin

MALAYSIA

(*) 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