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  • The L4971 is a step down monolithic power switching regulator delivering 1.5A at a voltage between 3.3V and 50V (selected by a simple external divider). Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical Rdson of 0.25Ω) to obtain very high efficency and high switching speed.

    A switching frequency up to 300KHz is achievable (the maximum power dissipation of the packages must be observed).
    A wide input voltage range between 8V to 55V and output voltages regulated from 3.3V to 50V cover the majority of today’s applications.
    Features of this new generations of DC-DC converter include pulse-by-pulse current limit, hiccup mode for short circuit protection, voltage feedforward regulation, soft-start, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown.
    The device is available in plastic dual in line, DIP8 for standard assembly, and SO16W for SMD assembly.

    主要特性

    • PROTECTION AGAINST FEEDBACK DISCONNECTION
    • INHIBIT FOR ZERO CURRENT CONSUMPTION
    • SOFT START FUNCTION
    • THERMAL SHUTDOWN
    • ZERO LOAD CURRENT OPERATION
    • VOLTAGE FEEDFORWARD
    • UP TO 1.5A STEP DOWN CONVERTER
    • PRECISE 3.3V (±1%) INTERNAL REFERENCE VOLTAGE
    • OPERATING INPUT VOLTAGE FROM 8V TO 55V
    • SWITCHING FREQUENCY ADJUSTABLE UP TO 300KHz
    • INTERNAL CURRENT LIMITING (PULSE-BY PULSE AND HICCUP MODE)
    • OUTPUT VOLTAGE ADJUSTABLE FROM 3.3V TO 50V

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
L4971 DIP-8 Tube
批量生产
1.185 10000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofL4971

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 1889 1 Order Now
RS COMPONENTS EUROPE 2478 1 Order Now
ARROW EUROPE 7554 0 Order Now
P&S ASIA/PACIFIC 40 1 Order Now
MOUSER WORLDWIDE 1058 1 Order Now
ANGLIA Live EUROPE 36300 50 Order Now

代理商库存报告日期: 2019-11-19

代理商名称

DIGIKEY

库存

1889

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

2478

Min.Order

1

地区

EUROPE Order Now

ARROW

库存

7554

Min.Order

0

地区

EUROPE Order Now

P&S

库存

40

Min.Order

1

地区

ASIA/PACIFIC Order Now

MOUSER

库存

1058

Min.Order

1

地区

WORLDWIDE Order Now

ANGLIA Live

库存

36300

Min.Order

50

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-19

获取样片
L4971D SO-16W Tube
批量生产
1.354 10000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofL4971D

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 292 1 Order Now
RS COMPONENTS EUROPE 370 1 Order Now
FUTURE WORLDWIDE 586 1 Order Now
ARROW EUROPE 2357 0 Order Now
MOUSER WORLDWIDE 1055 1 Order Now
Farnell Element14 EUROPE 142 1 Order Now

代理商库存报告日期: 2019-11-19

代理商名称

DIGIKEY

库存

292

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

370

Min.Order

1

地区

EUROPE Order Now

FUTURE

库存

586

Min.Order

1

地区

WORLDWIDE Order Now

ARROW

库存

2357

Min.Order

0

地区

EUROPE Order Now

MOUSER

库存

1055

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

142

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-19

立即购买
L4971D013TR SO-16W Tape And Reel
批量生产
1.354 10000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofL4971D013TR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 416 1 Order Now
RS COMPONENTS EUROPE 82 1 Order Now
AVNET AMERICA 24000 0 Order Now
ARROW EUROPE 1000 0 Order Now
ARROW AMERICA 16000 1000 Order Now
Farnell Element14 EUROPE 618 1 Order Now
RUTRONIK EUROPE 3000 1000 Order Now

代理商库存报告日期: 2019-11-19

代理商名称

DIGIKEY

库存

416

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

82

Min.Order

1

地区

EUROPE Order Now

AVNET

库存

24000

Min.Order

0

地区

AMERICA Order Now

ARROW

库存

1000

Min.Order

0

地区

EUROPE Order Now

ARROW

库存

16000

Min.Order

1000

地区

AMERICA Order Now

Farnell Element14

库存

618

Min.Order

1

地区

EUROPE Order Now

RUTRONIK

库存

3000

Min.Order

1000

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-19

获取样片

L4971

封装

DIP-8

包装类型

Tube

单价(US$)

1.185*

Distributor availability ofL4971

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 1889 1 Order Now
RS COMPONENTS EUROPE 2478 1 Order Now
ARROW EUROPE 7554 0 Order Now
P&S ASIA/PACIFIC 40 1 Order Now
MOUSER WORLDWIDE 1058 1 Order Now
ANGLIA Live EUROPE 36300 50 Order Now

代理商库存报告日期: 2019-11-19

代理商名称

DIGIKEY

库存

1889

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

2478

Min.Order

1

地区

EUROPE Order Now

ARROW

库存

7554

Min.Order

0

地区

EUROPE Order Now

P&S

库存

40

Min.Order

1

地区

ASIA/PACIFIC Order Now

MOUSER

库存

1058

Min.Order

1

地区

WORLDWIDE Order Now

ANGLIA Live

库存

36300

Min.Order

50

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-19

供货状态

批量生产

单价(US$)

1.185

数量

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4971D

封装

SO-16W

包装类型

Tube

单价(US$)

1.354*

Distributor availability ofL4971D

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 292 1 Order Now
RS COMPONENTS EUROPE 370 1 Order Now
FUTURE WORLDWIDE 586 1 Order Now
ARROW EUROPE 2357 0 Order Now
MOUSER WORLDWIDE 1055 1 Order Now
Farnell Element14 EUROPE 142 1 Order Now

代理商库存报告日期: 2019-11-19

代理商名称

DIGIKEY

库存

292

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

370

Min.Order

1

地区

EUROPE Order Now

FUTURE

库存

586

Min.Order

1

地区

WORLDWIDE Order Now

ARROW

库存

2357

Min.Order

0

地区

EUROPE Order Now

MOUSER

库存

1055

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

142

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-19

供货状态

批量生产

单价(US$)

1.354

数量

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4971D013TR

封装

SO-16W

包装类型

Tape And Reel

单价(US$)

1.354*

Distributor availability ofL4971D013TR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 416 1 Order Now
RS COMPONENTS EUROPE 82 1 Order Now
AVNET AMERICA 24000 0 Order Now
ARROW EUROPE 1000 0 Order Now
ARROW AMERICA 16000 1000 Order Now
Farnell Element14 EUROPE 618 1 Order Now
RUTRONIK EUROPE 3000 1000 Order Now

代理商库存报告日期: 2019-11-19

代理商名称

DIGIKEY

库存

416

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

82

Min.Order

1

地区

EUROPE Order Now

AVNET

库存

24000

Min.Order

0

地区

AMERICA Order Now

ARROW

库存

1000

Min.Order

0

地区

EUROPE Order Now

ARROW

库存

16000

Min.Order

1000

地区

AMERICA Order Now

Farnell Element14

库存

618

Min.Order

1

地区

EUROPE Order Now

RUTRONIK

库存

3000

Min.Order

1000

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-19

供货状态

批量生产

单价(US$)

1.354

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**
L4971
批量生产
DIP-8 工业 Ecopack2 (**)
L4971D
批量生产
SO-16W 工业 Ecopack1
L4971D013TR
批量生产
SO-16W 工业 Ecopack1

L4971

Package:

DIP-8

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

DIP-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L4971D

Package:

SO-16W

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-16W

Grade

Industrial

RoHS Compliance Grade

Ecopack1

L4971D013TR

Package:

SO-16W

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-16W

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.

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