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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
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ECCN (US)
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从分销商订购
从ST订购
L4971 DIP-8 Tube
Active
1.185 10000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofL4971

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DIGIKEY WORLDWIDE 1894 1 Order Now
RS COMPONENTS EUROPE 2498 1 Order Now
ARROW EUROPE 14054 0 Order Now
P&S ASIA/PACIFIC 40 1 Order Now
MOUSER WORLDWIDE 1259 1 Order Now
ANGLIA Live EUROPE 36950 50 Order Now

代理商库存报告日期: 2019-09-13

代理商名称

DIGIKEY

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1894

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RS COMPONENTS

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2498

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ARROW

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14054

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0

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P&S

库存

40

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1

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MOUSER

库存

1259

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1

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ANGLIA Live

库存

36950

Min.Order

50

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EUROPE Order Now

代理商库存报告日期: 2019-09-13

Get sample
L4971D SO-16W Tube
Active
1.354 10000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofL4971D

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地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 428 1 Order Now
RS COMPONENTS EUROPE 313 1 Order Now
FUTURE WORLDWIDE 1027 1 Order Now
ARROW EUROPE 577 0 Order Now
MOUSER WORLDWIDE 1189 1 Order Now
Farnell Element14 EUROPE 193 1 Order Now

代理商库存报告日期: 2019-09-13

代理商名称

DIGIKEY

库存

428

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1

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WORLDWIDE Order Now

RS COMPONENTS

库存

313

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1

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FUTURE

库存

1027

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1

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ARROW

库存

577

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0

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MOUSER

库存

1189

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1

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Farnell Element14

库存

193

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1

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EUROPE Order Now

代理商库存报告日期: 2019-09-13

立即购买
L4971D013TR SO-16W Tape And Reel
Active
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 452 1 Order Now
RS COMPONENTS EUROPE 4 1 Order Now
AVNET AMERICA 35000 0 Order Now
ARROW EUROPE 7000 0 Order Now
ARROW AMERICA 3000 1000 Order Now
Farnell Element14 EUROPE 798 1 Order Now
RUTRONIK EUROPE 5000 1000 Order Now

代理商库存报告日期: 2019-09-13

代理商名称

DIGIKEY

库存

452

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

4

Min.Order

1

地区

EUROPE Order Now

AVNET

库存

35000

Min.Order

0

地区

AMERICA Order Now

ARROW

库存

7000

Min.Order

0

地区

EUROPE Order Now

ARROW

库存

3000

Min.Order

1000

地区

AMERICA Order Now

Farnell Element14

库存

798

Min.Order

1

地区

EUROPE Order Now

RUTRONIK

库存

5000

Min.Order

1000

地区

EUROPE Order Now

代理商库存报告日期: 2019-09-13

Get sample

L4971

封装

DIP-8

包装类型

Tube

Unit Price (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 1894 1 Order Now
RS COMPONENTS EUROPE 2498 1 Order Now
ARROW EUROPE 14054 0 Order Now
P&S ASIA/PACIFIC 40 1 Order Now
MOUSER WORLDWIDE 1259 1 Order Now
ANGLIA Live EUROPE 36950 50 Order Now

代理商库存报告日期: 2019-09-13

代理商名称

DIGIKEY

库存

1894

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

2498

Min.Order

1

地区

EUROPE Order Now

ARROW

库存

14054

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

1259

Min.Order

1

地区

WORLDWIDE Order Now

ANGLIA Live

库存

36950

Min.Order

50

地区

EUROPE Order Now

代理商库存报告日期: 2019-09-13

供货状态

Active

Unit Price (US$)

1.185

数量

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4971D

封装

SO-16W

包装类型

Tube

Unit Price (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 428 1 Order Now
RS COMPONENTS EUROPE 313 1 Order Now
FUTURE WORLDWIDE 1027 1 Order Now
ARROW EUROPE 577 0 Order Now
MOUSER WORLDWIDE 1189 1 Order Now
Farnell Element14 EUROPE 193 1 Order Now

代理商库存报告日期: 2019-09-13

代理商名称

DIGIKEY

库存

428

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

313

Min.Order

1

地区

EUROPE Order Now

FUTURE

库存

1027

Min.Order

1

地区

WORLDWIDE Order Now

ARROW

库存

577

Min.Order

0

地区

EUROPE Order Now

MOUSER

库存

1189

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

193

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-09-13

供货状态

Active

Unit Price (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

Unit Price (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 452 1 Order Now
RS COMPONENTS EUROPE 4 1 Order Now
AVNET AMERICA 35000 0 Order Now
ARROW EUROPE 7000 0 Order Now
ARROW AMERICA 3000 1000 Order Now
Farnell Element14 EUROPE 798 1 Order Now
RUTRONIK EUROPE 5000 1000 Order Now

代理商库存报告日期: 2019-09-13

代理商名称

DIGIKEY

库存

452

Min.Order

1

地区

WORLDWIDE Order Now

RS COMPONENTS

库存

4

Min.Order

1

地区

EUROPE Order Now

AVNET

库存

35000

Min.Order

0

地区

AMERICA Order Now

ARROW

库存

7000

Min.Order

0

地区

EUROPE Order Now

ARROW

库存

3000

Min.Order

1000

地区

AMERICA Order Now

Farnell Element14

库存

798

Min.Order

1

地区

EUROPE Order Now

RUTRONIK

库存

5000

Min.Order

1000

地区

EUROPE Order Now

代理商库存报告日期: 2019-09-13

供货状态

Active

Unit Price (US$)

1.354

数量

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) 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

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产品型号 供货状态 封装 等级规格 符合RoHS级别 材料声明**
L4971
Active
DIP-8 工业 Ecopack2 (**)
L4971D
Active
SO-16W 工业 Ecopack1
L4971D013TR
Active
SO-16W 工业 Ecopack1

L4971

Package:

DIP-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DIP-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L4971D

Package:

SO-16W

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-16W

Grade

Industrial

RoHS Compliance Grade

Ecopack1

L4971D013TR

Package:

SO-16W

Material Declaration**:

PDF XML

Marketing Status

Active

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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