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L4974A PDF预览

L4974A

更新时间: 2024-09-14 22:51:55
品牌 Logo 应用领域
意法半导体 - STMICROELECTRONICS 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管PC
页数 文件大小 规格书
22页 329K
描述
3.5A SWITCHING REGULATOR

L4974A 技术参数

是否Rohs认证: 符合生命周期:Active
零件包装代码:DIP包装说明:DIP, DIP20,.3
针数:20Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
Factory Lead Time:13 weeks风险等级:1.69
Samacsys Confidence:3Samacsys Status:Released
Samacsys PartID:179351Samacsys Pin Count:20
Samacsys Part Category:Integrated CircuitSamacsys Package Category:Dual-In-Line Packages
Samacsys Footprint Name:POWERDIP20Samacsys Released Date:2015-09-17 10:56:35
Is Samacsys:N模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:VOLTAGE-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:50 V最小输入电压:15 V
标称输入电压:35 VJESD-30 代码:R-PDIP-T20
JESD-609代码:e3功能数量:1
端子数量:20最大输出电流:5.5 A
封装主体材料:PLASTIC/EPOXY封装代码:DIP
封装等效代码:DIP20,.3封装形状:RECTANGULAR
封装形式:IN-LINE峰值回流温度(摄氏度):NOT SPECIFIED
认证状态:Not Qualified座面最大高度:5.1 mm
子类别:Switching Regulator or Controllers表面贴装:NO
切换器配置:BUCK最大切换频率:200 kHz
技术:BCDMOS端子面层:Tin (Sn)
端子形式:THROUGH-HOLE端子节距:2.54 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:7.62 mmBase Number Matches:1

L4974A 数据手册

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L4974A  
3.5A SWITCHING REGULATOR  
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3.5A OUTPUT CURRENT  
MULTIPOWER BCD TECHNOLOGY  
5.1V TO 40V OUTPUT VOLTAGERANGE  
0 TO 90% DUTY CYCLE RANGE  
INTERNALFEED-FORWARD LINEREG.  
INTERNALCURRENT LIMITING  
PRECISE5.1V ± 2% ON CHIP REFERENCE  
RESET AND POWER FAIL FUNCTIONS  
INPUT/OUTPUT SYNC PIN  
UNDER VOLTAGE LOCK OUT WITH HYS-  
TERETIC TURN-ON  
PWM LATCH FOR SINGLE PULSE PER PE-  
RIOD  
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POWERDIP (16 + 2 + 2)  
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VERY HIGH EFFICIENCY  
SWITCHING FREQUENCY UP TO 200KHz  
THERMAL SHUTDOWN  
ORDERING NUMBER : L4974A  
CONTINUOUS MODE OPERATION  
the L4974A include reset and power fail for micro-  
processors, feed forward line regulation, soft start,  
limiting current and thermal protection. The device  
is mountedin a Powerdip16 +2 +2plasticpackage  
and requires few external components. Efficient  
operation at switching frequencies up to 200KHz  
allowsreductionin thesizeandcostofexternalfilter  
component.  
DESCRIPTION  
TheL4974Aisa stepdownmonolithicpowerswitch-  
ing 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  
efficiencyandvery fastswitching times. Featuresof  
BLOCK DIAGRAM  
1/22  
June 2000  
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.  

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