2 A step-down switching regulator for automotive applications

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  • The A7985A is a step-down switching regulator with a 2.5 A (minimum) current limited embedded power MOSFET, so it is able to deliver up to 2 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 HSOP8 package with exposed pad allows the reduction of Rth(JA) down to 40 °C/W.

    Key Features

    • AEC-Q100 qualified (see PPAP for more details)
    • 2 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
    • HSOP8 package

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Part Number
Package
Packing Type
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
Order from Distributors
Order from ST
A7985ATR PowerSO-8 Tape And Reel
Active
0.914 10000 EAR99 CHINA Check Availability

Distributor availability ofA7985ATR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2358 1 Order Now
MOUSER WORLDWIDE 6011 1 Order Now
Farnell Element14 EUROPE 2497 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

DIGIKEY

Stock

2358

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

6011

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2497

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Get sample
A7985A PowerSO-8 Tube
Active
0.914 10000 EAR99 CHINA Check Availability

Distributor availability ofA7985A

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1684 1 Order Now
Newark Element14 AMERICA 500 0 Order Now
MOUSER WORLDWIDE 930 1 Order Now
Farnell Element14 EUROPE 1179 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

DIGIKEY

Stock

1684

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

500

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

930

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1179

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Buy now

A7985ATR

Package

PowerSO-8

Packing Type

Tape And Reel

Unit Price (US$)

0.914*

Distributor availability ofA7985ATR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2358 1 Order Now
MOUSER WORLDWIDE 6011 1 Order Now
Farnell Element14 EUROPE 2497 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

DIGIKEY

Stock

2358

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

6011

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2497

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Marketing Status

Active

Unit Price (US$)

0.914

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

A7985A

Package

PowerSO-8

Packing Type

Tube

Unit Price (US$)

0.914*

Distributor availability ofA7985A

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1684 1 Order Now
Newark Element14 AMERICA 500 0 Order Now
MOUSER WORLDWIDE 930 1 Order Now
Farnell Element14 EUROPE 1179 1 Order Now

Distributor reported inventory date: 2019-11-13

Distributor Name

DIGIKEY

Stock

1684

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

500

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

930

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1179

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-11-13

Marketing Status

Active

Unit Price (US$)

0.914

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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Product included in our Longevity Program.

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00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS9022
      2 A step-down switching regulator for automotive applications
      7.0
      1.18 MB
      PDF
      DS9022

      2 A step-down switching regulator for automotive applications

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
      A798x, A597x switching regulators for car power management 1.0
      714.2 KB
      PDF

      A798x, A597x switching regulators for car power management

    • 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**
A7985A
Active
PowerSO-8 Automotive Ecopack2
A7985ATR
Active
PowerSO-8 Automotive Ecopack2

A7985A

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

Grade

Automotive

RoHS Compliance Grade

Ecopack2

A7985ATR

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

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.

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.