61 V 3A asynchronous step-down switching regulator with adjustable current limitation for automotive

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  • The A7987 is a step down monolithic switching regulator able to deliver up to 3 A DC. The output voltage adjustability ranges from 0.8 V to VIN. The wide input voltage range and the almost 100% duty cycle capability meet the fail-safe specifications for industrial systems. The embedded switch-over feature on the VBIAS pin maximizes the efficiency at light load. The adjustable current limitation, designed to select the inductor RMS current in accordance with the nominal output current, and the high switching frequency capability make the size of the application compact. Pulse by pulse current sensing with digital frequency fold-back implements an effective constant current protection over the different application conditions. The peak current fold-back decreases the stress of the power components in heavy short-circuit condition. The PGOOD open collector output can also implement output voltage sequencing during the power-up phase. Multiple devices can be synchronized sharing the SYNCH pin to prevent beating noise for low noise requirements such as in infotainment applications.

    Key Features

    • 3 A DC output current
    • 4.5 V to 61 V operating input voltage
    • RDS(on) = 250 mΩ typ.
    • Adjustable fsw (250 kHz to 1.5 MHz)
    • Low IQ-SHD (11 µA typ. from VIN)
    • Low IQ (1 mA typ. - VIN 24V - VOUT 3.3V)
    • Output voltage adjustable from 0.8 V to VIN
    • Synchronization
    • Adjustable soft-start time
    • Adjustable current limitation
    • Low-dropout operation
    • VBIAS improves efficiency at light load
    • PGOOD open collector output
    • Output voltage sequencing
    • Digital frequency fold-back in short-circuit
    • Auto recovery thermal shutdown
    • Qualified following AEC-Q100 requirements

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Part Number
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Budgetary Price (US$)*
Quantity
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A7987TR HTSSOP16 Tape And Reel
Active
2 10000 EAR99 - Check Availability

Distributor availability ofA7987TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now
AVNET AMERICA 1000 0 Order Now
MOUSER WORLDWIDE 818 1 Order Now

Distributor reported inventory date: 2019-07-19

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

1000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

818

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-07-19

Get sample

A7987TR

Package

HTSSOP16

Packing Type

Tape And Reel

Unit Price (US$)

2.0*

Distributor availability ofA7987TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now
AVNET AMERICA 1000 0 Order Now
MOUSER WORLDWIDE 818 1 Order Now

Distributor reported inventory date: 2019-07-19

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

1000

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

818

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-07-19

Marketing Status

Active

Unit Price (US$)

2

Quantity

10000

ECCN (US)

EAR99

Country of Origin

-

(*) 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.

Recommended for you

Related Applications

In-Vehicle Infotainment (IVI)

Telematics and Networking

Evaluation Tools

    • Part Number

      3 A step down DC/DC switching regulator (VIN = 4.5 V to 60 V) based on the A7987

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS12928
      61 V 3 A asynchronous step-down switching regulator with adjustable current limitation for automotive
      1.0
      1.29 MB
      PDF
      DS12928

      61 V 3 A asynchronous step-down switching regulator with adjustable current limitation for automotive

Publications and Collaterals

    • 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**
A7987TR
Active
HTSSOP16 Automotive Ecopack2

A7987TR

Package:

HTSSOP16

Material Declaration**:

Marketing Status

Active

Package

HTSSOP16

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.

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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.