L4978

批量生产
Design Win

降压开关稳压器

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概述
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
开始
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

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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

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产品型号
Order from distributors
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 Available at 2 distributors

经销商的可用性L4978D013TR

代理商名称
地区 库存 最小订购量 第三方链接
COMPEL EUROPE 1234 1 Buy from Distributor
MOUSER WORLDWIDE 259 1 Buy from Distributor

代理商库存报告日期: 2022-07-20

代理商名称

COMPEL

库存

1234

Min.Order

1

MOUSER

库存

259

Min.Order

1

地区

WORLDWIDE Buy from Distributor

代理商库存报告日期: 2022-07-20

批量生产
EAR99 NEC Tape and Reel SO-16W -40 150 MALAYSIA
L4978 Available at 2 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
Newark Element14 AMERICA 11 0 Buy from Distributor
MOUSER WORLDWIDE 1610 1 Buy from Distributor

代理商库存报告日期: 2022-07-20

代理商名称

Newark Element14

库存

11

Min.Order

0

地区

AMERICA Buy from Distributor

MOUSER

库存

1610

Min.Order

1

地区

WORLDWIDE Buy from Distributor

代理商库存报告日期: 2022-07-20

批量生产
EAR99 NEC Tube DIP-8 -40 150 CHINA
L4978D Available at 1 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
MOUSER WORLDWIDE 1126 1 Buy from Distributor

代理商库存报告日期: 2022-07-20

代理商名称

MOUSER

库存

1126

Min.Order

1

地区

WORLDWIDE Buy from Distributor

代理商库存报告日期: 2022-07-20

批量生产
EAR99 NEC Tube SO-16W -40 150 MALAYSIA

L4978D013TR 批量生产

封装:
SO-16W
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

产品型号:

L4978D013TR

ECCN (EU):

NEC

包装类型:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

150

Country of Origin:

MALAYSIA

经销商的可用性L4978D013TR

代理商名称
地区 库存 最小订购量 第三方链接
COMPEL EUROPE 1234 1 Buy from Distributor
MOUSER WORLDWIDE 259 1 Buy from Distributor

代理商库存报告日期: 2022-07-20

代理商名称

COMPEL

库存

1234

Min.Order

1

MOUSER

库存

259

Min.Order

1

地区

WORLDWIDE Buy from Distributor

代理商库存报告日期: 2022-07-20

L4978 批量生产

封装:
DIP-8
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

产品型号:

L4978

ECCN (EU):

NEC

包装类型:

Tube

Operating Temperature (°C)

Min:

-40

Max:

150

Country of Origin:

CHINA

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
Newark Element14 AMERICA 11 0 Buy from Distributor
MOUSER WORLDWIDE 1610 1 Buy from Distributor

代理商库存报告日期: 2022-07-20

代理商名称

Newark Element14

库存

11

Min.Order

0

地区

AMERICA Buy from Distributor

MOUSER

库存

1610

Min.Order

1

地区

WORLDWIDE Buy from Distributor

代理商库存报告日期: 2022-07-20

L4978D 批量生产

封装:
SO-16W
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

产品型号:

L4978D

ECCN (EU):

NEC

包装类型:

Tube

Operating Temperature (°C)

Min:

-40

Max:

150

Country of Origin:

MALAYSIA

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
MOUSER WORLDWIDE 1126 1 Buy from Distributor

代理商库存报告日期: 2022-07-20

代理商名称

MOUSER

库存

1126

Min.Order

1

地区

WORLDWIDE Buy from Distributor

代理商库存报告日期: 2022-07-20

Swipe or click the button to explore more details Don't show this again

(*) 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