概述
eDesignSuite
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 L4974A is a stepdown monolithic power switching regulator delivering 3.5A at a voltage variable from 5.1 to 40V. Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiency and very fast switching times. Features of the L4974A include reset and power fail for microprocessors, feed forward line regulation, soft start, limiting current and thermal protection. The device is mounted in a Powerdip 16 + 2 + 2 plastic package and requires few external components. Efficient operation at switching frequencies up to 200KHz allows reduction in the size and cost of external filter component.
  • 所有功能

    • PWM LATCH FOR SINGLE PULSE PER PERIOD
    • UNDER VOLTAGE LOCK OUT WITH HYSTERETIC TURN-ON
    • SWITCHING FREQUENCY UP TO 200KHz
    • VERY HIGH EFFICIENCY
    • CONTINUOUS MODE OPERATION
    • THERMAL SHUTDOWN
    • RESET AND POWER FAIL FUNCTIONS
    • PRECISE 5.1V ± 2% ON CHIP REFERENCE
    • 3.5A OUTPUT CURRENT
    • 0 TO 90% DUTY CYCLE RANGE
    • 5.1V TO 40V OUTPUT VOLTAGE RANGE
    • INTERNAL CURRENT LIMITING
    • INPUT/OUTPUT SYNC PIN
    • INTERNAL FEED-FORWARD LINE REG.

电路原理图

EDA符号、封装和3D模型

STMicroelectronics - L4974A

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**
L4974A
NRND
PDIP 20 工业 Ecopack1

L4974A

Package:

PDIP 20

Material Declaration**:

Marketing Status

NRND

Package

PDIP 20

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
L4974A Available at 5 distributors

经销商的可用性L4974A

代理商名称
地区 库存 最小订购量 第三方链接
DIGIKEY WORLDWIDE 1484 1 Buy from Distributor
RS COMPONENTS EUROPE 229 1 Buy from Distributor
Newark Element14 AMERICA 1 0 Buy from Distributor
MOUSER WORLDWIDE 145 1 Buy from Distributor
Farnell Element14 EUROPE 822 1 Buy from Distributor

代理商库存报告日期: 2022-05-14

代理商名称

DIGIKEY

库存

1484

Min.Order

1

地区

WORLDWIDE Buy from Distributor

RS COMPONENTS

库存

229

Min.Order

1

Newark Element14

库存

1

Min.Order

0

地区

AMERICA Buy from Distributor

MOUSER

库存

145

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Farnell Element14

库存

822

Min.Order

1

代理商库存报告日期: 2022-05-14

NRND
EAR99 NEC Tube PDIP 20 - - MALAYSIA

L4974A

供货状态

NRND

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

经销商的可用性L4974A

代理商名称
地区 库存 最小订购量 第三方链接
DIGIKEY WORLDWIDE 1484 1 Buy from Distributor
RS COMPONENTS EUROPE 229 1 Buy from Distributor
Newark Element14 AMERICA 1 0 Buy from Distributor
MOUSER WORLDWIDE 145 1 Buy from Distributor
Farnell Element14 EUROPE 822 1 Buy from Distributor

代理商库存报告日期: 2022-05-14

代理商名称

DIGIKEY

库存

1484

Min.Order

1

地区

WORLDWIDE Buy from Distributor

RS COMPONENTS

库存

229

Min.Order

1

Newark Element14

库存

1

Min.Order

0

地区

AMERICA Buy from Distributor

MOUSER

库存

145

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Farnell Element14

库存

822

Min.Order

1

代理商库存报告日期: 2022-05-14

ECCN (EU)

NEC

包装类型

Tube

封装

PDIP 20

Operating Temperature (°C)

(最小值)

-

(最大值)

-

Budgetary Price (US$)* / Qty

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