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  • The L5970AD is a step down monolithic power switching regulator with a switch current limit of 1.5A so it is able to deliver more than 1A DC current to the load depending on the application conditions.

    The output voltage can be set from 1.235V to 35V.
    The device uses an internal P-Channel D-MOS transistor (with a typical RDSON of 200mΩ) as switching element to avoid the use of bootstrap capacitor and guarantee high efficiency.
    An internal oscillator fixes the switching frequency at 500KHz to minimize the size of external components. Having a minimum input voltage of 4.4V only, it is particularly suitable for 5V 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

    • INHIBIT FOR ZERO CURRENT CONSUMPTION
    • INTERNAL CURRENT LIMITING
    • PROTECTION AGAINST FEEDBACK DISCONNECTION
    • SYNCHRONIZATION
    • THERMAL SHUTDOWN
    • VOLTAGE FEEDFORWARD
    • 500KHz INTERNALLY FIXED FREQUENCY
    • 1.5A INTERNAL SWITCH
    • 3.3V / (±2%) REFERENCE VOLTAGE
    • OPERATING INPUT VOLTAGE FROM 4.4V TO 36V
    • LOW DROPOUT OPERATION: 100% DUTY CYCLE
    • ZERO LOAD CURRENT OPERATION
    • OUTPUT VOLTAGE ADJUSTABLE FROM 1.235V TO 35V

Circuit Diagram

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Technical Documentation

    • Description Version Size Action
      DS4263
      1.5A switch step down switching regulator
      1.3
      135.79 KB
      PDF
      DS4263

      1.5A switch step down switching regulator

    • 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

    • 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

      Electric vehicle (EV) ecosystem

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L5970AD
Active
SO-8 Industrial Ecopack2 (**)
L5970ADTR
Active
SO-8 Industrial Ecopack2 (**)

L5970AD

Package:

SO-8

Material Declaration**:

Marketing Status

Active

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L5970ADTR

Package:

SO-8

Material Declaration**:

Marketing Status

Active

Package

SO-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 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
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L5970ADTR Available at 5 distributors

Distributor availability ofL5970ADTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 29985 1 Order Now
RS COMPONENTS EUROPE 2495 1 Order Now
Newark Element14 AMERICA 544 0 Order Now
MOUSER WORLDWIDE 2500 1 Order Now
Farnell Element14 EUROPE 113 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

29985

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2495

Min.Order

1

Region

EUROPE Order Now

Newark Element14

Stock

544

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2500

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

113

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

Sample & Buy Buy now
Active
EAR99 NEC Tape And Reel SO-8 -40 150 CHINA 0.959 / 1k
L5970AD Available at 6 distributors

Distributor availability ofL5970AD

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1786 1 Order Now
RS COMPONENTS EUROPE 1510 5 Order Now
FUTURE WORLDWIDE 1500 1 Order Now
ARROW EUROPE 1201 0 Order Now
MOUSER WORLDWIDE 1440 1 Order Now
Farnell Element14 EUROPE 12 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

1786

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1510

Min.Order

5

Region

EUROPE Order Now

FUTURE

Stock

1500

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

1201

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

1440

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

12

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

Buy now
Active
EAR99 NEC Tube SO-8 -40 150 CHINA 0.959 / 1k

L5970ADTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.959 / 1k

Distributor availability ofL5970ADTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 29985 1 Order Now
RS COMPONENTS EUROPE 2495 1 Order Now
Newark Element14 AMERICA 544 0 Order Now
MOUSER WORLDWIDE 2500 1 Order Now
Farnell Element14 EUROPE 113 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

29985

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2495

Min.Order

1

Region

EUROPE Order Now

Newark Element14

Stock

544

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

2500

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

113

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO-8

Operating Temperature (°C)

(min)

-40

(max)

150

Budgetary Price (US$)* / Qty

0.959 / 1k

Country of Origin

CHINA

L5970AD

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.959 / 1k

Distributor availability ofL5970AD

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1786 1 Order Now
RS COMPONENTS EUROPE 1510 5 Order Now
FUTURE WORLDWIDE 1500 1 Order Now
ARROW EUROPE 1201 0 Order Now
MOUSER WORLDWIDE 1440 1 Order Now
Farnell Element14 EUROPE 12 1 Order Now

Distributor reported inventory date: 2020-08-02

Distributor Name

DIGIKEY

Stock

1786

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1510

Min.Order

5

Region

EUROPE Order Now

FUTURE

Stock

1500

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

1201

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

1440

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

12

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-02

ECCN (EU)

NEC

Packing Type

Tube

Package

SO-8

Operating Temperature (°C)

(min)

-40

(max)

150

Budgetary Price (US$)* / Qty

0.959 / 1k

Country of Origin

CHINA

(*) 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