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  • 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.

    Key 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.

电路原理图

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样片和购买

产品型号
封装
包装类型
供货状态
预算价格(US$)
数量
ECCN (US)
Country of Origin
从分销商订购
从ST订购
L4972A PDIP 20 Tube
批量生产
2.033 10000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofL4972A

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 475 1 Order Now
MOUSER WORLDWIDE 400 1 Order Now
Farnell Element14 EUROPE 889 1 Order Now

代理商库存报告日期: 2019-11-14

代理商名称

DIGIKEY

库存

475

Min.Order

1

地区

WORLDWIDE Order Now

MOUSER

库存

400

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

889

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-14

获取样片
L4972AD SO-20 Tube
批量生产
2.033 10000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofL4972AD

代理商名称
地区 库存 最小订购量 Third party link
RS COMPONENTS EUROPE 127 1 Order Now
MOUSER WORLDWIDE 626 1 Order Now
Farnell Element14 EUROPE 63 1 Order Now

代理商库存报告日期: 2019-11-14

代理商名称

RS COMPONENTS

库存

127

Min.Order

1

地区

EUROPE Order Now

MOUSER

库存

626

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

63

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-14

立即购买
L4972AD013TR SO-20 Tape And Reel
批量生产
2.033 10000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofL4972AD013TR

代理商名称
地区 库存 最小订购量 Third party link
FUTURE WORLDWIDE 1000 1000 Order Now
ARROW EUROPE 12000 0 Order Now
Farnell Element14 EUROPE 37 1 Order Now

代理商库存报告日期: 2019-11-14

代理商名称

FUTURE

库存

1000

Min.Order

1000

地区

WORLDWIDE Order Now

ARROW

库存

12000

Min.Order

0

地区

EUROPE Order Now

Farnell Element14

库存

37

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-14

获取样片

L4972A

封装

PDIP 20

包装类型

Tube

单价(US$)

2.033*

Distributor availability ofL4972A

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 475 1 Order Now
MOUSER WORLDWIDE 400 1 Order Now
Farnell Element14 EUROPE 889 1 Order Now

代理商库存报告日期: 2019-11-14

代理商名称

DIGIKEY

库存

475

Min.Order

1

地区

WORLDWIDE Order Now

MOUSER

库存

400

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

889

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-14

供货状态

批量生产

单价(US$)

2.033

数量

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4972AD

封装

SO-20

包装类型

Tube

单价(US$)

2.033*

Distributor availability ofL4972AD

代理商名称
地区 库存 最小订购量 Third party link
RS COMPONENTS EUROPE 127 1 Order Now
MOUSER WORLDWIDE 626 1 Order Now
Farnell Element14 EUROPE 63 1 Order Now

代理商库存报告日期: 2019-11-14

代理商名称

RS COMPONENTS

库存

127

Min.Order

1

地区

EUROPE Order Now

MOUSER

库存

626

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

63

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-14

供货状态

批量生产

单价(US$)

2.033

数量

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4972AD013TR

封装

SO-20

包装类型

Tape And Reel

单价(US$)

2.033*

Distributor availability ofL4972AD013TR

代理商名称
地区 库存 最小订购量 Third party link
FUTURE WORLDWIDE 1000 1000 Order Now
ARROW EUROPE 12000 0 Order Now
Farnell Element14 EUROPE 37 1 Order Now

代理商库存报告日期: 2019-11-14

代理商名称

FUTURE

库存

1000

Min.Order

1000

地区

WORLDWIDE Order Now

ARROW

库存

12000

Min.Order

0

地区

EUROPE Order Now

Farnell Element14

库存

37

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-14

供货状态

批量生产

单价(US$)

2.033

数量

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) 建议转售单价(美元)仅用于预算用途。如需以当地货币计价的报价,请联系您当地的 ST销售办事处 或我们的 经销商

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产品型号 供货状态 封装 等级规格 符合RoHS级别 Material Declaration**
L4972A
批量生产
PDIP 20 工业 Ecopack1
L4972AD
批量生产
SO-20 工业 Ecopack1 (*)
L4972AD013TR
批量生产
SO-20 工业 Ecopack1 (*)

L4972A

Package:

PDIP 20

Material Declaration**:

Marketing Status

批量生产

Package

PDIP 20

Grade

Industrial

RoHS Compliance Grade

Ecopack1

L4972AD

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-20

Grade

Industrial

RoHS Compliance Grade

Ecopack1 (*)

L4972AD013TR

Package:

SO-20

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-20

Grade

Industrial

RoHS Compliance Grade

Ecopack1 (*)

(**) 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.