L5973AD

Active
Education

2 A switch step down switching regulator

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Product overview

Description

The L5973AD is a step down monolithic power switching regulator with a switch current limit of 2A so it is able to deliver more than 1.5 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 RthJA down to approximately 40 °C/W.
The device uses an internal P-Channel D-MOS transistor (with a typical of 200 mΩ) as switching element to avoid the use of bootstrap capacitor and guarantee high efficiency.
An internal oscillator fixes the switching frequency at 500 kHz to minimize the size of external components.
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.
  • All 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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Quality and Reliability

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.

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
L5973AD Available at 6 distributors

Distributor availability ofL5973AD

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 94 1 Order Now
RS COMPONENTS EUROPE 450 5 Order Now
AVNET AMERICA 2900 0 Order Now
Newark Element14 AMERICA 1 0 Order Now
MOUSER WORLDWIDE 84 1 Order Now
Farnell Element14 EUROPE 780 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

94

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

450

Min.Order

5

Region

EUROPE Order Now

AVNET

Stock

2900

Min.Order

0

Region

AMERICA Order Now

Newark Element14

Stock

1

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

84

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

780

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

Buy Direct
Active
EAR99 NEC Tube PowerSO-8 -40 150 PHILIPPINES 1.0 / 1k
L5973ADTR Available at 1 distributors

Distributor availability ofL5973ADTR

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 242 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

Farnell Element14

Stock

242

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

Active
EAR99 NEC Tape And Reel PowerSO-8 -40 150 PHILIPPINES 1.0 / 1k

L5973AD

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.0 / 1k

Distributor availability ofL5973AD

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 94 1 Order Now
RS COMPONENTS EUROPE 450 5 Order Now
AVNET AMERICA 2900 0 Order Now
Newark Element14 AMERICA 1 0 Order Now
MOUSER WORLDWIDE 84 1 Order Now
Farnell Element14 EUROPE 780 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

94

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

450

Min.Order

5

Region

EUROPE Order Now

AVNET

Stock

2900

Min.Order

0

Region

AMERICA Order Now

Newark Element14

Stock

1

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

84

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

780

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

ECCN (EU)

NEC

Packing Type

Tube

Package

PowerSO-8

Operating Temperature (°C)

(min)

-40

(max)

150

Budgetary Price (US$)* / Qty

1.0 / 1k

Country of Origin

PHILIPPINES

L5973ADTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.0 / 1k

Distributor availability ofL5973ADTR

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 242 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

Farnell Element14

Stock

242

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

PowerSO-8

Operating Temperature (°C)

(min)

-40

(max)

150

Budgetary Price (US$)* / Qty

1.0 / 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