Low drop voltage regulator with watchdog

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  • The L4993 is a monolithic integrated 5 V Voltage regulator with a low drop voltage at currents up to 150 mA.The output voltage regulating element consists in a p-channel MOS and the regulation is performed regardless of input voltage transients up to 40 V. The high precision of the output voltage is obtained with a pre-trimmed reference voltage. The L4993 is protected against short circuit and an over-temperature protection switches off the device in case of extremely high power dissipation. The L4993 watchdog is active when the Enable is high. State of the art features like reset and watchdog make this device particularly suitable to supply microprocessor systems in automotive applications.

    Key Features

    • AEC-Q100 qualified
    • Operating DC supply voltage range 5.6 V to 31 V
    • Reset circuit sensing the output voltage down to 1 V
    • Programmable reset pulse delay with external capacitor
    • Watchdog
    • Programmable watchdog timer with external
    • Enable input for enabling/disabling the watchdog functionality
    • Thermal shutdown and short circuit protection
    • Wide temperature range (Tj = -40°C to 150°C)

Circuit Diagram

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Part Number
Package
Packing Type
Temperature (°C) Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
More info
Order from Distributors
Order from ST
min
max
L4993DTR SO-8 Tape And Reel - -
Active
0.6189 1000 EAR99
MORE INFO

Country of Origin:

CHINA

Check Availability

Distributor availability ofL4993DTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 12477 1 Order Now
MOUSER WORLDWIDE 3498 1 Order Now

Distributor reported inventory date: 2019-04-22

Distributor Name

DIGIKEY

Stock

12477

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3498

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-04-22

Get sample
L4993MDTR SO-20 Tape And Reel -40 150
Active
0.698 1000 EAR99
MORE INFO

Country of Origin:

MALAYSIA

Check Availability

Distributor availability ofL4993MDTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 911 1 Order Now

Distributor reported inventory date: 2019-04-22

Distributor Name

DIGIKEY

Stock

911

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-04-22

Get sample
L4993MD SO-20 Tube -40 150
Active
0.698 1000 EAR99
MORE INFO

Country of Origin:

-

No availability of distributors reported, please contact our sales office
L4993D SO-8 Tube -40 150
NRND
0.6189 1000 EAR99
MORE INFO

Country of Origin:

-

No availability of distributors reported, please contact our sales office

L4993DTR

Package

SO-8

Packing Type

Tape And Reel

Unit Price (US$)

0.6189*

Distributor availability ofL4993DTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 12477 1 Order Now
MOUSER WORLDWIDE 3498 1 Order Now

Distributor reported inventory date: 2019-04-22

Distributor Name

DIGIKEY

Stock

12477

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3498

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-04-22

Operating Temperature (°C)

(min)

-

(max)

-

Marketing Status

Active

Unit Price (US$)

0.6189

Quantity

1000

ECCN (US)

EAR99

Country of Origin

CHINA

L4993MDTR

Package

SO-20

Packing Type

Tape And Reel

Unit Price (US$)

0.698*

Distributor availability ofL4993MDTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 911 1 Order Now

Distributor reported inventory date: 2019-04-22

Distributor Name

DIGIKEY

Stock

911

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-04-22

Operating Temperature (°C)

(min)

-40

(max)

150

Marketing Status

Active

Unit Price (US$)

0.698

Quantity

1000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4993MD

Package

SO-20

Packing Type

Tube

Unit Price (US$)

0.698*

Operating Temperature (°C)

(min)

-40

(max)

150

Marketing Status

Active

Unit Price (US$)

0.698

Quantity

1000

ECCN (US)

EAR99

Country of Origin

-

L4993D

Package

SO-8

Packing Type

Tube

Unit Price (US$)

0.6189*

Operating Temperature (°C)

(min)

-40

(max)

150

Marketing Status

NRND

Unit Price (US$)

0.6189

Quantity

1000

ECCN (US)

EAR99

Country of Origin

-

(*) 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

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS5285
      Automotive low drop voltage regulator
      10.0
      1.03 MB
      PDF
      DS5285

      Automotive low drop voltage regulator

    • Description Version Size Action
      AN290
      VERY LOW DROP REGULATORS ENHANCE SUPPLY PERFORMANCE
      1.2
      525.66 KB
      PDF
      AN290

      VERY LOW DROP REGULATORS ENHANCE SUPPLY PERFORMANCE

Publications and Collaterals

    • Description Version Size Action
      Linear and Switching Voltage Regulators Selection Guide 3.0
      370.88 KB
      PDF
      Smart power solutions for car body applications 4.0
      3.38 MB
      PDF

      Linear and Switching Voltage Regulators Selection Guide

      Smart power solutions for car body applications

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF

      Electric vehicle (EV) ecosystem

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L4993D
NRND
SO-8 Automotive Ecopack1 (*)
L4993DTR
Active
SO-8 Automotive Ecopack2
L4993MD
Active
SO-20 Automotive Ecopack1 (*)
L4993MDTR
Active
SO-20 Automotive Ecopack2 (**)

L4993D

Package:

SO-8

Material Declaration**:

Marketing Status

NRND

Package

SO-8

Grade

Automotive

RoHS Compliance Grade

Ecopack1 (*)

L4993DTR

Package:

SO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-8

Grade

Automotive

RoHS Compliance Grade

Ecopack2

L4993MD

Package:

SO-20

Material Declaration**:

PDF

Marketing Status

Active

Package

SO-20

Grade

Automotive

RoHS Compliance Grade

Ecopack1 (*)

L4993MDTR

Package:

SO-20

Material Declaration**:

PDF

Marketing Status

Active

Package

SO-20

Grade

Automotive

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.