1 A step down switching regulator

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  • The L4976 is a step down monolithic power switching regulator delivering 1A 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 Rds(ON) of 0.25W) 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 40V 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, protection against feedback loop disconnection 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
    • and hiccup mode)
    • Thermal shutdown
    • Zero load current operation
    • Voltage feedforward
    • Up to 1A step down converter
    • Precise 5.1V reference voltage
    • Operating input voltage from 8v to 55v
    • Switching frequency adjustable up to 300kHz
    • Internal current limiting (pulse-bypulse
    • Output voltage adjustable from 0.5V to 50V

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$)
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ECCN (US)
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从分销商订购
从ST订购
L4976 DIP-8 Tube
批量生产
1.729 10000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofL4976

代理商名称
地区 库存 最小订购量 Third party link
ARROW EUROPE 653 0 Order Now
MOUSER WORLDWIDE 100 1 Order Now

代理商库存报告日期: 2019-10-17

代理商名称

ARROW

库存

653

Min.Order

0

地区

EUROPE Order Now

MOUSER

库存

100

Min.Order

1

地区

WORLDWIDE Order Now

代理商库存报告日期: 2019-10-17

获取样片
L4976D SO-16W Tube
批量生产
1.788 10000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofL4976D

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 41 1 Order Now
Newark Element14 AMERICA 298 0 Order Now
MOUSER WORLDWIDE 253 1 Order Now

代理商库存报告日期: 2019-10-17

代理商名称

DIGIKEY

库存

41

Min.Order

1

地区

WORLDWIDE Order Now

Newark Element14

库存

298

Min.Order

0

地区

AMERICA Order Now

MOUSER

库存

253

Min.Order

1

地区

WORLDWIDE Order Now

代理商库存报告日期: 2019-10-17

立即购买
L4976D013TR SO-16W Tape And Reel
批量生产
1.788 10000 EAR99 MALAYSIA 查看供货情况

Distributor availability ofL4976D013TR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 100 1 Order Now
MOUSER WORLDWIDE 1986 1 Order Now

代理商库存报告日期: 2019-10-17

代理商名称

DIGIKEY

库存

100

Min.Order

1

地区

WORLDWIDE Order Now

MOUSER

库存

1986

Min.Order

1

地区

WORLDWIDE Order Now

代理商库存报告日期: 2019-10-17

获取样片

L4976

封装

DIP-8

包装类型

Tube

单价(US$)

1.729*

Distributor availability ofL4976

代理商名称
地区 库存 最小订购量 Third party link
ARROW EUROPE 653 0 Order Now
MOUSER WORLDWIDE 100 1 Order Now

代理商库存报告日期: 2019-10-17

代理商名称

ARROW

库存

653

Min.Order

0

地区

EUROPE Order Now

MOUSER

库存

100

Min.Order

1

地区

WORLDWIDE Order Now

代理商库存报告日期: 2019-10-17

供货状态

批量生产

单价(US$)

1.729

数量

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4976D

封装

SO-16W

包装类型

Tube

单价(US$)

1.788*

Distributor availability ofL4976D

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 41 1 Order Now
Newark Element14 AMERICA 298 0 Order Now
MOUSER WORLDWIDE 253 1 Order Now

代理商库存报告日期: 2019-10-17

代理商名称

DIGIKEY

库存

41

Min.Order

1

地区

WORLDWIDE Order Now

Newark Element14

库存

298

Min.Order

0

地区

AMERICA Order Now

MOUSER

库存

253

Min.Order

1

地区

WORLDWIDE Order Now

代理商库存报告日期: 2019-10-17

供货状态

批量生产

单价(US$)

1.788

数量

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4976D013TR

封装

SO-16W

包装类型

Tape And Reel

单价(US$)

1.788*

Distributor availability ofL4976D013TR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 100 1 Order Now
MOUSER WORLDWIDE 1986 1 Order Now

代理商库存报告日期: 2019-10-17

代理商名称

DIGIKEY

库存

100

Min.Order

1

地区

WORLDWIDE Order Now

MOUSER

库存

1986

Min.Order

1

地区

WORLDWIDE Order Now

代理商库存报告日期: 2019-10-17

供货状态

批量生产

单价(US$)

1.788

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 材料声明**
L4976
批量生产
DIP-8 工业 Ecopack2 (**)
L4976D
批量生产
SO-16W 工业 Ecopack1
L4976D013TR
批量生产
SO-16W 工业 Ecopack1

L4976

Package:

DIP-8

Material Declaration**:

Marketing Status

批量生产

Package

DIP-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L4976D

Package:

SO-16W

Material Declaration**:

Marketing Status

批量生产

Package

SO-16W

Grade

Industrial

RoHS Compliance Grade

Ecopack1

L4976D013TR

Package:

SO-16W

Material Declaration**:

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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