L4972

Active
Design Win

2 A SWITCHING REGULATOR

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Product overview

Description

The L4972A is a stepdown monolithic power switching regulator delivering 2A at a voltage variable from 5.1 to 40V. Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiency and very fast switching times. Features of the L4972 include reset and power fail for microprocessors, feed forward line regulation, soft start, limiting current and thermal protection. The device is mounted in a Powerdip 16 + 2 + 2 and SO20 large plastic packages and requires few external components. Efficient operation at switching frequencies up to 200KHz allows reduction in the size and cost of external filter component.
  • All features

    • PWM LATCH FOR SINGLE PULSE PER PERIOD
    • UNDER VOLTAGE LOCK OUT WITH HYSTERETIC TURN-ON
    • SWITCHING FREQUENCY UP TO 200KHz
    • VERY HIGH EFFICIENCY
    • CONTINUOUS MODE OPERATION
    • THERMAL SHUTDOWN
    • RESET AND POWER FAIL FUNCTIONS
    • PRECISE 5.1V ± 2% ON CHIP REFERENCE
    • 2A OUTPUT CURRENT
    • 0 TO 90% DUTY CYCLE RANGE
    • 5.1V TO 40V OUTPUT VOLTAGE RANGE
    • INTERNAL CURRENT LIMITING
    • INPUT/OUTPUT SYNC PIN
    • INTERNAL FEED-FORWARD LINE REG.

Circuit Diagram

EDA Symbols, Footprints and 3D Models

STMicroelectronics - L4972

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Symbols

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Footprints

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3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L4972A
NRND
PDIP 20 Industrial Ecopack1
L4972AD
NRND
SO-20 Industrial Ecopack2
L4972AD013TR
Active
SO-20 Industrial Ecopack2

L4972A

Package:

PDIP 20

Material Declaration**:

Marketing Status

NRND

Package

PDIP 20

Grade

Industrial

RoHS Compliance Grade

Ecopack1

L4972AD

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

NRND

Package

SO-20

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L4972AD013TR

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-20

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

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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
L4972A Available at 1 distributors

Distributor availability ofL4972A

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 351 1 Buy from Distributor

Distributor reported inventory date: 2022-08-06

Distributor Name

Farnell Element14

Stock

351

Min.Order

1

Distributor reported inventory date: 2022-08-06

NRND
EAR99 NEC Tube PDIP 20 - - MALAYSIA
L4972AD Available at 3 distributors

Distributor availability ofL4972AD

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3 1 Buy from Distributor
RS COMPONENTS EUROPE 90 1 Buy from Distributor
MOUSER WORLDWIDE 266 1 Buy from Distributor

Distributor reported inventory date: 2022-08-08

Distributor Name

DIGIKEY

Stock

3

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

90

Min.Order

1

MOUSER

Stock

266

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-08-08

NRND
EAR99 NEC Tube SO-20 - - -
L4972AD013TR No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape and Reel SO-20 - - MALAYSIA

L4972A NRND

Package:
PDIP 20
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

L4972A

ECCN (EU):

NEC

Packing Type:

Tube

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

MALAYSIA

Distributor availability ofL4972A

Distributor Name
Region Stock Min. Order Third party link
Farnell Element14 EUROPE 351 1 Buy from Distributor

Distributor reported inventory date: 2022-08-06

Distributor Name

Farnell Element14

Stock

351

Min.Order

1

Distributor reported inventory date: 2022-08-06

L4972AD NRND

Package:
SO-20
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

L4972AD

ECCN (EU):

NEC

Packing Type:

Tube

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

-

Distributor availability ofL4972AD

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3 1 Buy from Distributor
RS COMPONENTS EUROPE 90 1 Buy from Distributor
MOUSER WORLDWIDE 266 1 Buy from Distributor

Distributor reported inventory date: 2022-08-08

Distributor Name

DIGIKEY

Stock

3

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

90

Min.Order

1

MOUSER

Stock

266

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-08-08

L4972AD013TR Active

Package:
SO-20
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

L4972AD013TR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office
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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors