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
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Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
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Order from ST
A7985ATR PowerSO-8 Tape And Reel
Active
0.914 1000 EAR99 CHINA Check Availability

Distributor availability ofA7985ATR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 3049 1 Order Now

Distributor reported inventory date: 2019-03-26

Distributor Name

MOUSER

Stock

3049

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-03-26

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A7985A PowerSO-8 Tube
Active
0.914 1000 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 1966 1 Order Now
Farnell Element14 EUROPE 1397 1 Order Now

Distributor reported inventory date: 2019-03-26

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

1966

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1397

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-03-26

Buy direct

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
MOUSER WORLDWIDE 3049 1 Order Now

Distributor reported inventory date: 2019-03-26

Distributor Name

MOUSER

Stock

3049

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-03-26

Marketing Status

Active

Unit Price (US$)

0.914

Quantity

1000

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 1966 1 Order Now
Farnell Element14 EUROPE 1397 1 Order Now

Distributor reported inventory date: 2019-03-26

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

1966

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1397

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-03-26

Marketing Status

Active

Unit Price (US$)

0.914

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

00 Files Selected

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

A7985ATR

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

Grade

Automotive

RoHS Compliance Grade

Ecopack2

A7985A

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.