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  • The L7986/A is a step-down switching regulator with a 3.7 A (minimum) current limited embedded power MOSFET, so it is able to deliver up to 3 A current to the load depending on the application conditions. The input voltage can range from 4.5 V to 38 V, while the output voltage can be set starting from 0.6 V to VIN. Requiring a minimum set of external components, the device includes an internal 250 kHz switching frequency oscillator that can be externally adjusted up to 1 MHz. The DFN and the HSOP packages with exposed pad allow reducing the RthJAdown to 60 °C/W and 40 °C/W respectively.

    Key Features

    • 3 A DC output current
    • 4.5 V to 38 V input voltage
    • Output voltage adjustable from 0.6 V
    • 250 kHz switching frequency, programmable up to 1 MHz
    • Internal soft-start and enable
    • Low dropout operation: 100% duty cycle
    • Voltage feed-forward
    • Zero load current operation
    • Overcurrent and thermal protection
    • VFDFPN 3 x 3 - 10L and HSOP8 package

Sample & Buy

Part Number
Package
Packing Type
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
Order from Distributors
Order from ST
L7986ATR PowerSO-8 Tape And Reel
Active
0.804 10000 EAR99 CHINA Check Availability

Distributor availability ofL7986ATR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7162 1 Order Now
ARROW EUROPE 2500 0 Order Now
Newark Element14 AMERICA 329 0 Order Now
P&S ASIA/PACIFIC 30 1 Order Now
MOUSER WORLDWIDE 8680 1 Order Now
Farnell Element14 EUROPE 879 1 Order Now
RUTRONIK EUROPE 10000 2500 Order Now

Distributor reported inventory date: 2019-07-16

Distributor Name

DIGIKEY

Stock

7162

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

2500

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

329

Min.Order

0

Region

AMERICA Order Now

P&S

Stock

30

Min.Order

1

Region

ASIA/PACIFIC Order Now

MOUSER

Stock

8680

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

879

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

10000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-16

Get sample
L7986TR DFN10 3X3 Tape And Reel
Active
0.791 10000 EAR99 PHILIPPINES Check Availability

Distributor availability ofL7986TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7022 1 Order Now
ARROW EUROPE 20000 0 Order Now
MOUSER WORLDWIDE 3403 1 Order Now
Farnell Element14 EUROPE 7532 1 Order Now

Distributor reported inventory date: 2019-07-16

Distributor Name

DIGIKEY

Stock

7022

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

20000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

3403

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

7532

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-16

Get sample
L7986A PowerSO-8 Tube
Active
0.804 10000 EAR99 CHINA Check Availability

Distributor availability ofL7986A

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2037 1 Order Now
RS COMPONENTS EUROPE 310 5 Order Now
ARROW EUROPE 1498 0 Order Now
MOUSER WORLDWIDE 1852 1 Order Now
Farnell Element14 EUROPE 3864 1 Order Now

Distributor reported inventory date: 2019-07-16

Distributor Name

DIGIKEY

Stock

2037

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

310

Min.Order

5

Region

EUROPE Order Now

ARROW

Stock

1498

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

1852

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3864

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-16

Buy now

L7986ATR

Package

PowerSO-8

Packing Type

Tape And Reel

Unit Price (US$)

0.804*

Distributor availability ofL7986ATR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7162 1 Order Now
ARROW EUROPE 2500 0 Order Now
Newark Element14 AMERICA 329 0 Order Now
P&S ASIA/PACIFIC 30 1 Order Now
MOUSER WORLDWIDE 8680 1 Order Now
Farnell Element14 EUROPE 879 1 Order Now
RUTRONIK EUROPE 10000 2500 Order Now

Distributor reported inventory date: 2019-07-16

Distributor Name

DIGIKEY

Stock

7162

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

2500

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

329

Min.Order

0

Region

AMERICA Order Now

P&S

Stock

30

Min.Order

1

Region

ASIA/PACIFIC Order Now

MOUSER

Stock

8680

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

879

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

10000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-16

Marketing Status

Active

Unit Price (US$)

0.804

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

L7986TR

Package

DFN10 3X3

Packing Type

Tape And Reel

Unit Price (US$)

0.791*

Distributor availability ofL7986TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7022 1 Order Now
ARROW EUROPE 20000 0 Order Now
MOUSER WORLDWIDE 3403 1 Order Now
Farnell Element14 EUROPE 7532 1 Order Now

Distributor reported inventory date: 2019-07-16

Distributor Name

DIGIKEY

Stock

7022

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

20000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

3403

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

7532

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-16

Marketing Status

Active

Unit Price (US$)

0.791

Quantity

10000

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

L7986A

Package

PowerSO-8

Packing Type

Tube

Unit Price (US$)

0.804*

Distributor availability ofL7986A

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2037 1 Order Now
RS COMPONENTS EUROPE 310 5 Order Now
ARROW EUROPE 1498 0 Order Now
MOUSER WORLDWIDE 1852 1 Order Now
Farnell Element14 EUROPE 3864 1 Order Now

Distributor reported inventory date: 2019-07-16

Distributor Name

DIGIKEY

Stock

2037

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

310

Min.Order

5

Region

EUROPE Order Now

ARROW

Stock

1498

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

1852

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3864

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-16

Marketing Status

Active

Unit Price (US$)

0.804

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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Evaluation Tools

    • Part Number

      3 A step-down switching demonstration board based on the L7986 in DFN10 package

      3 A step-down switching demonstration board based on the L7986A in HSOP8 package

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS8735
      3 A step-down switching regulator
      7.0
      1.25 MB
      PDF
      DS8735

      3 A step-down switching regulator

    • Description Version Size Action
      DN0011
      ST1S03 alternative topology: Using a buck in a negative buck-boost configuration
      1.2
      361.3 KB
      PDF
      DN0011

      ST1S03 alternative topology: Using a buck in a negative buck-boost configuration

HW Model, CAD Libraries & SVD

    • Description Version Size Action
      X798X Pspice model
      2.07 MB
      ZIP

      X798X Pspice model

Publications and Collaterals

    • Description Version Size Action
      DC-DC converters
      557.92 KB
      PDF

      DC-DC converters

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF
      Switching Converters (DC-DC) – Quick Reference Guide 1.0
      481.92 KB
      PDF

      Electric vehicle (EV) ecosystem

      Switching Converters (DC-DC) – Quick Reference Guide

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L7986A
Active
PowerSO-8 Industrial Ecopack2
L7986ATR
Active
PowerSO-8 Industrial Ecopack2
L7986TR
Active
DFN10 3X3 Industrial Ecopack2

L7986A

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L7986ATR

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L7986TR

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.