L7986

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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

Sample & Buy

Part Number
Package
Packing Type
Marketing Status
ECCN (US)
Country of Origin
Approximate Price (US$)* / Qty
Order from ST
Order from Distributors
L7986ATR PowerSO-8 Tape And Reel
Active
EAR99 CHINA 1.18 / 1k Check Availability

Distributor availability ofL7986ATR

Distributor Name
Region Stock Min. Order Third party link
COMPEL EUROPE 500 1 Order Now
RS COMPONENTS EUROPE 2500 1 Order Now
Newark Element14 AMERICA 299 0 Order Now
P&S ASIA/PACIFIC 9 1 Order Now
Farnell Element14 EUROPE 2 1 Order Now

Distributor reported inventory date: 2020-03-30

Distributor Name

COMPEL

Stock

500

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

2500

Min.Order

1

Region

EUROPE Order Now

Newark Element14

Stock

299

Min.Order

0

Region

AMERICA Order Now

P&S

Stock

9

Min.Order

1

Region

ASIA/PACIFIC Order Now

Farnell Element14

Stock

2

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-03-30

L7986TR DFN10 3X3 Tape And Reel
Active
EAR99 PHILIPPINES 2.00 / 1k No availability of distributors reported, please contact our sales office
L7986A PowerSO-8 Tube
Active
EAR99 CHINA 2.05 / 1k Check Availability

Distributor availability ofL7986A

Distributor Name
Region Stock Min. Order Third party link
COMPEL EUROPE 1853 1 Order Now
RS COMPONENTS EUROPE 60 5 Order Now
Newark Element14 AMERICA 531 0 Order Now
Farnell Element14 EUROPE 1199 1 Order Now
ANGLIA Live EUROPE 1300 1 Order Now

Distributor reported inventory date: 2020-03-30

Distributor Name

COMPEL

Stock

1853

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

60

Min.Order

5

Region

EUROPE Order Now

Newark Element14

Stock

531

Min.Order

0

Region

AMERICA Order Now

Farnell Element14

Stock

1199

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

1300

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-03-30

L7986ATR

Package

PowerSO-8

Packing Type

Tape And Reel

Approximate Price (US$)* / Qty

1.18 / 1k

Distributor availability ofL7986ATR

Distributor Name
Region Stock Min. Order Third party link
COMPEL EUROPE 500 1 Order Now
RS COMPONENTS EUROPE 2500 1 Order Now
Newark Element14 AMERICA 299 0 Order Now
P&S ASIA/PACIFIC 9 1 Order Now
Farnell Element14 EUROPE 2 1 Order Now

Distributor reported inventory date: 2020-03-30

Distributor Name

COMPEL

Stock

500

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

2500

Min.Order

1

Region

EUROPE Order Now

Newark Element14

Stock

299

Min.Order

0

Region

AMERICA Order Now

P&S

Stock

9

Min.Order

1

Region

ASIA/PACIFIC Order Now

Farnell Element14

Stock

2

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-03-30

Marketing Status

Active

Budgetary Price (US$)* / Qty

1.18 / 1k

ECCN (US)

EAR99

Country of Origin

CHINA

L7986TR

Package

DFN10 3X3

Packing Type

Tape And Reel

Approximate Price (US$)* / Qty

2.00 / 1k

Marketing Status

Active

Budgetary Price (US$)* / Qty

2.00 / 1k

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

L7986A

Package

PowerSO-8

Packing Type

Tube

Approximate Price (US$)* / Qty

2.05 / 1k

Distributor availability ofL7986A

Distributor Name
Region Stock Min. Order Third party link
COMPEL EUROPE 1853 1 Order Now
RS COMPONENTS EUROPE 60 5 Order Now
Newark Element14 AMERICA 531 0 Order Now
Farnell Element14 EUROPE 1199 1 Order Now
ANGLIA Live EUROPE 1300 1 Order Now

Distributor reported inventory date: 2020-03-30

Distributor Name

COMPEL

Stock

1853

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

60

Min.Order

5

Region

EUROPE Order Now

Newark Element14

Stock

531

Min.Order

0

Region

AMERICA Order Now

Farnell Element14

Stock

1199

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

1300

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-03-30

Marketing Status

Active

Budgetary Price (US$)* / Qty

2.05 / 1k

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
      TN1224
      Mounting instructions for SMD (surface mounting device) packages
      2.2
      1.06 MB
      PDF
      TN1224

      Mounting instructions for SMD (surface mounting device) packages

    • 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

      Electric vehicle (EV) ecosystem

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.

eDesignSuite

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.

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