Up to 1.5 A step down switching regulator

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  • Key Features

    • Inhibit for zero current consumption
    • Internal current limiting
    • Protection against feedback disconnection
    • Synchronization
    • Thermal shutdown
    • Voltage feedforward
    • 500 kHz Internally fixed frequency
    • 2 A Internal switch
    • 3.3 V / (±2 %) reference voltage
    • Operating input voltage from 4 V to 36 V
    • Low dropout operation: 100 % duty cycle
    • Zero load current operation
    • Output voltage adjustable from 1.235 V to 35 V

Circuit Diagram

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L5973AD PowerSO-8 Tube
Active
0.991 10000 EAR99 - Check Availability

Distributor availability ofL5973AD

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DIGIKEY WORLDWIDE 2629 1 Order Now
RS COMPONENTS EUROPE 1535 5 Order Now
AVNET AMERICA 9509 0 Order Now
FUTURE WORLDWIDE 850 1 Order Now
ARROW EUROPE 3882 0 Order Now
Newark Element14 AMERICA 10 0 Order Now
ARROW AMERICA 1193 2000 Order Now
MOUSER WORLDWIDE 2241 1 Order Now
Farnell Element14 EUROPE 5335 1 Order Now
ANGLIA Live EUROPE 10414 1 Order Now

Distributor reported inventory date: 2019-07-16

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DIGIKEY

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2629

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1

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9509

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850

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3882

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10

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1193

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2000

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2241

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1

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Farnell Element14

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5335

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1

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ANGLIA Live

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10414

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Distributor reported inventory date: 2019-07-16

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L5973ADTR PowerSO-8 Tape And Reel
Active
0.991 10000 EAR99 - Check Availability

Distributor availability ofL5973ADTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6739 1 Order Now
ARROW EUROPE 5000 0 Order Now
ARROW AMERICA 5000 2500 Order Now
MOUSER WORLDWIDE 5710 1 Order Now
RUTRONIK EUROPE 30000 2500 Order Now

Distributor reported inventory date: 2019-07-16

Distributor Name

DIGIKEY

Stock

6739

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

5000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

5000

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

5710

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

30000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-16

Get sample

L5973AD

Package

PowerSO-8

Packing Type

Tube

Unit Price (US$)

0.991*

Distributor availability ofL5973AD

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2629 1 Order Now
RS COMPONENTS EUROPE 1535 5 Order Now
AVNET AMERICA 9509 0 Order Now
FUTURE WORLDWIDE 850 1 Order Now
ARROW EUROPE 3882 0 Order Now
Newark Element14 AMERICA 10 0 Order Now
ARROW AMERICA 1193 2000 Order Now
MOUSER WORLDWIDE 2241 1 Order Now
Farnell Element14 EUROPE 5335 1 Order Now
ANGLIA Live EUROPE 10414 1 Order Now

Distributor reported inventory date: 2019-07-16

Distributor Name

DIGIKEY

Stock

2629

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1535

Min.Order

5

Region

EUROPE Order Now

AVNET

Stock

9509

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

850

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

3882

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

10

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

1193

Min.Order

2000

Region

AMERICA Order Now

MOUSER

Stock

2241

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

5335

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

10414

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-16

Marketing Status

Active

Unit Price (US$)

0.991

Quantity

10000

ECCN (US)

EAR99

Country of Origin

-

L5973ADTR

Package

PowerSO-8

Packing Type

Tape And Reel

Unit Price (US$)

0.991*

Distributor availability ofL5973ADTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6739 1 Order Now
ARROW EUROPE 5000 0 Order Now
ARROW AMERICA 5000 2500 Order Now
MOUSER WORLDWIDE 5710 1 Order Now
RUTRONIK EUROPE 30000 2500 Order Now

Distributor reported inventory date: 2019-07-16

Distributor Name

DIGIKEY

Stock

6739

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

5000

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

5000

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

5710

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

30000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-16

Marketing Status

Active

Unit Price (US$)

0.991

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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00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS3330
      2 A switch step down switching regulator
      9.3
      483.8 KB
      PDF
      DS3330

      2 A switch step down switching regulator

    • Description Version Size Action
      AN2823
      Current source for LED driving based on the L5973AD
      1.1
      1.54 MB
      PDF
      AN1723
      Designing with L5973AD high efficiency DC-DC converter
      4.0
      1.09 MB
      PDF
      AN2823

      Current source for LED driving based on the L5973AD

      AN1723

      Designing with L5973AD high efficiency DC-DC converter

    • 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
      X597X Pspice model
      3.64 MB
      ZIP

      X597X Pspice model

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**
L5973AD
Active
PowerSO-8 Industrial Ecopack2
L5973ADTR
Active
PowerSO-8 Industrial Ecopack2

L5973AD

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L5973ADTR

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

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.