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  • The L5973D is a step down monolithic power switching regulator with a minimum switch current limit of 2.5 A so it is able to deliver more than 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 SO8 package with exposed frame, that allows to reduce the Rth(j-amb) down to approximately 40 °C/W. The device uses an internal P-channel D-MOS transistor (with a typical Rdson 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 is particularly suitable for 5 V bus, available in all computer related applications. Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection.

    Key Features

    • 2.5 A internal switch
    • 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
    • Synchronization
    • Adjustable soft-start time
    • Inhibit for zero current consumption
    • Protection against feedback disconnection
    • Thermal shutdown

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    • Part number
      Status
      Description
      Type
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      STEVAL-ISA101V1

      Active

      2 A DC step-down switching regulator with 4 V/36 V input voltage range based on the L5973D

      PSU and Converter Solution Eval Boards --
      STEVAL-ISA101V1

      Description:

      2 A DC step-down switching regulator with 4 V/36 V input voltage range based on the L5973D

EDA Symbols, Footprints and 3D Models

STMicroelectronics - L5973D

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L5973D
Active
PowerSO-8 Industrial Ecopack2
L5973D013TR
Active
PowerSO-8 Industrial Ecopack2

L5973D

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L5973D013TR

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.

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

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
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L5973D Available at 8 distributors

Distributor availability ofL5973D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1737 1 Order Now
COMPEL EUROPE 1899 1 Order Now
RS COMPONENTS EUROPE 2535 5 Order Now
AVNET AMERICA 613 0 Order Now
ARROW EUROPE 5651 0 Order Now
MOUSER WORLDWIDE 1391 1 Order Now
ANGLIA Live EUROPE 4028 1 Order Now
RUTRONIK EUROPE 700 100 Order Now

Distributor reported inventory date: 2020-10-29

Distributor Name

DIGIKEY

Stock

1737

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1899

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

2535

Min.Order

5

Region

EUROPE Order Now

AVNET

Stock

613

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

5651

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

1391

Min.Order

1

Region

WORLDWIDE Order Now

ANGLIA Live

Stock

4028

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

700

Min.Order

100

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-29

Buy Direct
Active
EAR99 NEC Tube PowerSO-8 -40 150 PHILIPPINES 1.038 / 1k
L5973D013TR Available at 10 distributors

Distributor availability ofL5973D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10400 1 Order Now
COMPEL EUROPE 46 1 Order Now
RS COMPONENTS EUROPE 11120 5 Order Now
ARROW EUROPE 45000 0 Order Now
Newark Element14 AMERICA 84 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 7000 1 Order Now
Farnell Element14 EUROPE 1465 1 Order Now
ANGLIA Live EUROPE 750 250 Order Now
RUTRONIK EUROPE 12500 2500 Order Now

Distributor reported inventory date: 2020-10-29

Distributor Name

DIGIKEY

Stock

10400

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

46

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

11120

Min.Order

5

Region

EUROPE Order Now

ARROW

Stock

45000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

84

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

2500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

7000

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1465

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

750

Min.Order

250

Region

EUROPE Order Now

RUTRONIK

Stock

12500

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-29

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel PowerSO-8 -40 150 PHILIPPINES 1.038 / 1k

L5973D

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.038 / 1k

Distributor availability ofL5973D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1737 1 Order Now
COMPEL EUROPE 1899 1 Order Now
RS COMPONENTS EUROPE 2535 5 Order Now
AVNET AMERICA 613 0 Order Now
ARROW EUROPE 5651 0 Order Now
MOUSER WORLDWIDE 1391 1 Order Now
ANGLIA Live EUROPE 4028 1 Order Now
RUTRONIK EUROPE 700 100 Order Now

Distributor reported inventory date: 2020-10-29

Distributor Name

DIGIKEY

Stock

1737

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1899

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

2535

Min.Order

5

Region

EUROPE Order Now

AVNET

Stock

613

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

5651

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

1391

Min.Order

1

Region

WORLDWIDE Order Now

ANGLIA Live

Stock

4028

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

700

Min.Order

100

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-29

ECCN (EU)

NEC

Packing Type

Tube

Package

PowerSO-8

Operating Temperature (°C)

(min)

-40

(max)

150

Budgetary Price (US$)* / Qty

1.038 / 1k

Country of Origin

PHILIPPINES

L5973D013TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.038 / 1k

Distributor availability ofL5973D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10400 1 Order Now
COMPEL EUROPE 46 1 Order Now
RS COMPONENTS EUROPE 11120 5 Order Now
ARROW EUROPE 45000 0 Order Now
Newark Element14 AMERICA 84 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 7000 1 Order Now
Farnell Element14 EUROPE 1465 1 Order Now
ANGLIA Live EUROPE 750 250 Order Now
RUTRONIK EUROPE 12500 2500 Order Now

Distributor reported inventory date: 2020-10-29

Distributor Name

DIGIKEY

Stock

10400

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

46

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

11120

Min.Order

5

Region

EUROPE Order Now

ARROW

Stock

45000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

84

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

2500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

7000

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1465

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

750

Min.Order

250

Region

EUROPE Order Now

RUTRONIK

Stock

12500

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-29

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

PowerSO-8

Operating Temperature (°C)

(min)

-40

(max)

150

Budgetary Price (US$)* / Qty

1.038 / 1k

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