3A step-down switching regulator

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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

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L7986ATR PowerSO-8 Tape And Reel
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0.804 1000 EAR99 CHINA Check Availability

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L7986TR DFN10 3X3 Tape And Reel
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Distributor reported inventory date: 2019-04-21

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DIGIKEY

Stock

166

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1

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WORLDWIDE Order Now

ARROW

Stock

44000

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0

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ARROW

Stock

2500

Min.Order

4000

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AMERICA Order Now

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Stock

4115

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1

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7762

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Distributor reported inventory date: 2019-04-21

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L7986A PowerSO-8 Tube
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0.804 1000 EAR99 CHINA Check Availability

Distributor availability ofL7986A

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RS COMPONENTS EUROPE 890 5 Order Now
MOUSER WORLDWIDE 234 1 Order Now
Farnell Element14 EUROPE 2711 1 Order Now
ANGLIA Live EUROPE 100 100 Order Now

Distributor reported inventory date: 2019-04-21

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RS COMPONENTS

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890

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5

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EUROPE Order Now

MOUSER

Stock

234

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2711

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1

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Stock

100

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100

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Distributor reported inventory date: 2019-04-21

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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 7567 1 Order Now
FUTURE WORLDWIDE 2500 2500 Order Now
ARROW EUROPE 5000 0 Order Now
Newark Element14 AMERICA 329 0 Order Now
ARROW AMERICA 5000 2500 Order Now
P&S ASIA/PACIFIC 30 1 Order Now
MOUSER WORLDWIDE 13973 1 Order Now
Farnell Element14 EUROPE 55 1 Order Now
RUTRONIK EUROPE 19980 2500 Order Now

Distributor reported inventory date: 2019-04-21

Distributor Name

DIGIKEY

Stock

7567

Min.Order

1

Region

WORLDWIDE Order Now

FUTURE

Stock

2500

Min.Order

2500

Region

WORLDWIDE Order Now

ARROW

Stock

5000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

329

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

5000

Min.Order

2500

Region

AMERICA Order Now

P&S

Stock

30

Min.Order

1

Region

ASIA/PACIFIC Order Now

MOUSER

Stock

13973

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

55

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

19980

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-04-21

Marketing Status

Active

Unit Price (US$)

0.804

Quantity

1000

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 166 1 Order Now
ARROW EUROPE 44000 0 Order Now
ARROW AMERICA 2500 4000 Order Now
MOUSER WORLDWIDE 4115 1 Order Now
Farnell Element14 EUROPE 7762 1 Order Now
RUTRONIK EUROPE 4000 4000 Order Now

Distributor reported inventory date: 2019-04-21

Distributor Name

DIGIKEY

Stock

166

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

44000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

2500

Min.Order

4000

Region

AMERICA Order Now

MOUSER

Stock

4115

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

7762

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

4000

Min.Order

4000

Region

EUROPE Order Now

Distributor reported inventory date: 2019-04-21

Marketing Status

Active

Unit Price (US$)

0.791

Quantity

1000

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
RS COMPONENTS EUROPE 890 5 Order Now
MOUSER WORLDWIDE 234 1 Order Now
Farnell Element14 EUROPE 2711 1 Order Now
ANGLIA Live EUROPE 100 100 Order Now

Distributor reported inventory date: 2019-04-21

Distributor Name

RS COMPONENTS

Stock

890

Min.Order

5

Region

EUROPE Order Now

MOUSER

Stock

234

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2711

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

100

Min.Order

100

Region

EUROPE Order Now

Distributor reported inventory date: 2019-04-21

Marketing Status

Active

Unit Price (US$)

0.804

Quantity

1000

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

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
      1.1
      359.11 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
      Brochure Power management guide 10.2018
      4.42 MB
      PDF
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF
      Switching Converters (DC-DC) – Quick Reference Guide 1.0
      481.92 KB
      PDF

      Brochure Power management guide

      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.

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Converter

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output Power

V This option is required and must be a number.
A This option is required and must be a number.