A5973D

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Up to 2 A step down switching regulator for automotive applications

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  • The A5973D is a step-down monolithic power switching regulator with a minimum switch current limit of 2.25 A so it is able to deliver up to 2 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an HSOP8 package with exposed frame, that allows to reduce the Rth(JA)down to approximately 40 °C/W. The device uses an internal P-channel DMOS transistor (with a typical RDS(on)of 250 mΩ) as switching element to minimize the size of the external components. An internal oscillator fixes the switching frequency at 250 kHz. Having a minimum input voltage of 4 V only it fits the automotive applications requiring the device operation even in cold crank conditions. A pulse-by-pulse current limit with the internal frequency modulation offers an effective constant current short-circuit protection.

    Key Features

    • Qualified following the AEC-Q100 requirements (see PPAP for more details)
    • 2 A DC output current
    • Operating input voltage from 4 V to 36 V
    • 3.3 V / (± 2%) reference voltage
    • Output voltage adjustable from 1.235 V to 35 V
    • Low dropout operation: 100% duty cycle
    • 250 kHz internally fixed frequency
    • Voltage feedforward
    • Zero load current operation
    • Internal current limiting
    • Inhibit for zero current consumption
    • Synchronization
    • Protection against feedback disconnection
    • Thermal shutdown

Circuit Diagram

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Technical Documentation

    • Description Version Size Action
      DS5501
      Up to 2 A step-down switching regulator for automotive applications
      9.0
      1.29 MB
      PDF
      DS5501

      Up to 2 A step-down switching regulator for automotive applications

    • 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

HW Model, CAD Libraries & SVD

    • Description Version Size Action
      X597X Pspice model
      3.64 MB
      ZIP

      X597X Pspice model

Publications and Collaterals

    • Description Version Size Action
      A798x, A597x switching regulators for car power management 1.0
      714.2 KB
      PDF
      Up to 3 A switching step-down regulators 1.0
      739.58 KB
      PDF

      A798x, A597x switching regulators for car power management

      Up to 3 A switching step-down regulators

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF

      Electric vehicle (EV) ecosystem

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
A5973D
Active
PowerSO-8 Automotive Ecopack2
A5973D013TR
Active
PowerSO-8 Automotive Ecopack2

A5973D

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

Grade

Automotive

RoHS Compliance Grade

Ecopack2

A5973D013TR

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.

LED Driver

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]

LED custom

V This option is required.
A This option is required.
Ω This option is required.

LEDs

This option is required. And must be a whole positive number between 1 and 20.
This option is required. And must be a whole positive number between 1 and 20.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Package
Packing Type
Marketing Status
ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
A5973D Available at 4 distributors

Distributor availability ofA5973D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1489 1 Order Now
COMPEL EUROPE 66 1 Order Now
AVNET AMERICA 909 0 Order Now
ANGLIA Live EUROPE 3 1 Order Now

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

1489

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

66

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

909

Min.Order

0

Region

AMERICA Order Now

ANGLIA Live

Stock

3

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-06

PowerSO-8 Tube
Active
EAR99 PHILIPPINES 1.463 / 1k
A5973D013TR Available at 3 distributors

Distributor availability ofA5973D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5000 1 Order Now
MOUSER WORLDWIDE 2490 1 Order Now
Farnell Element14 EUROPE 42 1 Order Now

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

5000

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2490

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

42

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-06

Get sample PowerSO-8 Tape And Reel
Active
EAR99 PHILIPPINES 1.463 / 1k

A5973D

Package

PowerSO-8

Packing Type

Tube

Budgetary Price (US$)*/Qty

1.463 / 1k

Distributor availability ofA5973D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1489 1 Order Now
COMPEL EUROPE 66 1 Order Now
AVNET AMERICA 909 0 Order Now
ANGLIA Live EUROPE 3 1 Order Now

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

1489

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

66

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

909

Min.Order

0

Region

AMERICA Order Now

ANGLIA Live

Stock

3

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-06

Marketing Status

Active

Budgetary Price (US$)* / Qty

1.463 / 1k

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

A5973D013TR

Package

PowerSO-8

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

1.463 / 1k

Distributor availability ofA5973D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5000 1 Order Now
MOUSER WORLDWIDE 2490 1 Order Now
Farnell Element14 EUROPE 42 1 Order Now

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

5000

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2490

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

42

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-06

Marketing Status

Active

Budgetary Price (US$)* / Qty

1.463 / 1k

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

(*) 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