L4978

批量生产

降压开关稳压器

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概述
Online design
样片和购买
解决方案
文件
CAD资源
工具与软件
质量与可靠性
Partner products
Sales Briefcase

产品概述

描述

The L4978 is a step down monolithic power switching regulator delivering 2A 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, DIP-8 for standard assembly, and SO16W for SMD assembly.
  • 所有功能

    • PROTECTION AGAINST FEEDBACK DISCONNECTION
    • INHIBIT FOR ZERO CURRENT CONSUMPTION
    • SOFT START FUNCTION
    • THERMAL SHUTDOWN
    • ZERO LOAD CURRENT OPERATION
    • VOLTAGE FEEDFORWARD
    • UP TO 2A 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-BYPULSE AND HICCUP MODE)
    • OUTPUT VOLTAGE ADJUSTABLE FROM 3.3V TO 50V

电路原理图

EDA符号、封装和3D模型

STMicroelectronics - L4978

为您的应用下载所有EDA符号、封装和3D模型,加快您的设计速度。您可以从大量CAD格式中进行选择,以匹配您的设计工具链。

Symbols

符号

Footprints

封装

3D model

3D模型

质量与可靠性

产品型号 Marketing Status 封装 等级规格 符合RoHS级别 材料声明**
L4978
批量生产
DIP-8 工业 Ecopack2
L4978D
批量生产
SO-16W 工业 Ecopack1
L4978D013TR
批量生产
SO-16W 工业 Ecopack1

L4978

Package:

DIP-8

Material Declaration**:

Marketing Status

批量生产

Package

DIP-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L4978D

Package:

SO-16W

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-16W

Grade

Industrial

RoHS Compliance Grade

Ecopack1

L4978D013TR

Package:

SO-16W

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-16W

Grade

Industrial

RoHS Compliance Grade

Ecopack1

(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此,它们可能不是100%适用于特定的设备。有关特定设备的信息,请联系 销售支持

样片和购买

产品型号
从分销商订购
从ST订购
供货状态
ECCN (US)
ECCN (EU)
包装类型
封装
温度(ºC) Country of Origin
Budgetary Price (US$)*/Qty
最小值
最大值
L4978D013TR 无法联系到经销商,请联系我们的销售办事处
批量生产
EAR99 NEC Tape And Reel SO-16W -40 150 MALAYSIA 1.389 / 1k
L4978 Available at 5 distributors

经销商的可用性L4978

代理商名称
地区 库存 最小订购量 第三方链接
DIGIKEY WORLDWIDE 528 1 Buy from Distributor
FUTURE WORLDWIDE 75 1 Buy from Distributor
Newark Element14 AMERICA 33 0 Buy from Distributor
MOUSER WORLDWIDE 37 1 Buy from Distributor
Farnell Element14 EUROPE 126 1 Buy from Distributor

代理商库存报告日期: 2021-10-16

代理商名称

DIGIKEY

库存

528

Min.Order

1

地区

WORLDWIDE Buy from Distributor

FUTURE

库存

75

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Newark Element14

库存

33

Min.Order

0

地区

AMERICA Buy from Distributor

MOUSER

库存

37

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Farnell Element14

库存

126

Min.Order

1

代理商库存报告日期: 2021-10-16

Buy Direct
批量生产
EAR99 NEC Tube DIP-8 -40 150 CHINA 1.389 / 1k
L4978D Available at 4 distributors

经销商的可用性L4978D

代理商名称
地区 库存 最小订购量 第三方链接
RS COMPONENTS EUROPE 398 1 Buy from Distributor
Newark Element14 AMERICA 91 0 Buy from Distributor
MOUSER WORLDWIDE 1355 1 Buy from Distributor
Farnell Element14 EUROPE 260 1 Buy from Distributor

代理商库存报告日期: 2021-10-16

代理商名称

RS COMPONENTS

库存

398

Min.Order

1

Newark Element14

库存

91

Min.Order

0

地区

AMERICA Buy from Distributor

MOUSER

库存

1355

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Farnell Element14

库存

260

Min.Order

1

代理商库存报告日期: 2021-10-16

Buy Direct
批量生产
EAR99 NEC Tube SO-16W -40 150 MALAYSIA 1.5279 / 1k

L4978D013TR

供货状态

批量生产

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.389 / 1k

ECCN (EU)

NEC

包装类型

Tape And Reel

封装

SO-16W

Operating Temperature (°C)

(最小值)

-40

(最大值)

150

Budgetary Price (US$)* / Qty

1.389 / 1k

Country of Origin

MALAYSIA

L4978

供货状态

批量生产

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.389 / 1k

经销商的可用性L4978

代理商名称
地区 库存 最小订购量 第三方链接
DIGIKEY WORLDWIDE 528 1 Buy from Distributor
FUTURE WORLDWIDE 75 1 Buy from Distributor
Newark Element14 AMERICA 33 0 Buy from Distributor
MOUSER WORLDWIDE 37 1 Buy from Distributor
Farnell Element14 EUROPE 126 1 Buy from Distributor

代理商库存报告日期: 2021-10-16

代理商名称

DIGIKEY

库存

528

Min.Order

1

地区

WORLDWIDE Buy from Distributor

FUTURE

库存

75

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Newark Element14

库存

33

Min.Order

0

地区

AMERICA Buy from Distributor

MOUSER

库存

37

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Farnell Element14

库存

126

Min.Order

1

代理商库存报告日期: 2021-10-16

ECCN (EU)

NEC

包装类型

Tube

封装

DIP-8

Operating Temperature (°C)

(最小值)

-40

(最大值)

150

Budgetary Price (US$)* / Qty

1.389 / 1k

Country of Origin

CHINA

L4978D

供货状态

批量生产

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.5279 / 1k

经销商的可用性L4978D

代理商名称
地区 库存 最小订购量 第三方链接
RS COMPONENTS EUROPE 398 1 Buy from Distributor
Newark Element14 AMERICA 91 0 Buy from Distributor
MOUSER WORLDWIDE 1355 1 Buy from Distributor
Farnell Element14 EUROPE 260 1 Buy from Distributor

代理商库存报告日期: 2021-10-16

代理商名称

RS COMPONENTS

库存

398

Min.Order

1

Newark Element14

库存

91

Min.Order

0

地区

AMERICA Buy from Distributor

MOUSER

库存

1355

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Farnell Element14

库存

260

Min.Order

1

代理商库存报告日期: 2021-10-16

ECCN (EU)

NEC

包装类型

Tube

封装

SO-16W

Operating Temperature (°C)

(最小值)

-40

(最大值)

150

Budgetary Price (US$)* / Qty

1.5279 / 1k

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