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L5971 PDF预览

L5971

更新时间: 2024-11-25 22:31:47
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
页数 文件大小 规格书
11页 98K
描述
1.5A STEP DOWN SWITCHING REGULATOR

L5971 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Obsolete零件包装代码:DIP
包装说明:MINI, PLASTIC, DIP-8针数:8
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.82
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:28 V最小输入电压:6.5 V
标称输入电压:12 VJESD-30 代码:R-PDIP-T8
JESD-609代码:e3功能数量:1
端子数量:8最大输出电流:3 A
封装主体材料:PLASTIC/EPOXY封装代码:DIP
封装等效代码:DIP8,.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:5.08 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:300 kHz
技术:BCDMOS端子面层:Matte 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

L5971 数据手册

 浏览型号L5971的Datasheet PDF文件第2页浏览型号L5971的Datasheet PDF文件第3页浏览型号L5971的Datasheet PDF文件第4页浏览型号L5971的Datasheet PDF文件第5页浏览型号L5971的Datasheet PDF文件第6页浏览型号L5971的Datasheet PDF文件第7页 
L5971  
1.5A STEP DOWN SWITCHING REGULATOR  
UP TO 1.5A STEP DOWN CONVERTER  
OPERATING INPUT VOLTAGE FROM 6.5V  
TO 28V  
PRECISE 1.26V (±1%) INTERNAL REFER-  
ENCE VOLTAGE  
OUTPUT VOLTAGE ADJUSTABLE FROM  
1.26V TO 20V  
Minidip  
SO16W  
SWITCHING FREQUENCY ADJUSTABLE UP  
TO 500KHz  
ORDERING NUMBERS: L5971 (Minidip)  
L5971D (SO16)  
VOLTAGEFEEDFORWARD  
ZERO LOAD CURRENT OPERATION  
INTERNAL CURRENT LIMITING (PULSE-BY-  
PULSE AND HICCUPMODE)  
INHIBIT FOR ZERO CURRENT CONSUMP-  
TION  
PROTECTION AGAINST FEEDBACK DIS-  
CONNECTION  
THERMAL SHUTDOWN  
A switching frequency up to 500KHz is achiev-  
able (the maximum power dissipation of the pack-  
ages must be observed).  
Features of this new generations of DC-DC con-  
verter include pulse-by-pulse current limit, hiccup  
mode for short circuit protection, voltage feedfor-  
ward regulation, soft-start, protection against  
feedback loop disconnection, inhibit for zero cur-  
rent consumption and thermal shutdown.  
SOFT START FUNCTION  
The device is available in plastic dual in line,  
MINIDIP 8 for standard assembly, and SO16 for  
SMD assembly.  
DESCRIPTION  
The L5971 is a step down monolithic power  
switching regulator delivering 1.5A at a voltage  
between 1.26V and 20V (selected by a simple  
external divider). Realized in BCD mixed technol-  
ogy, the device uses an internal power D-MOS  
transistor (with a typical Rdson of 0.25) to ob-  
tain very high efficency and high switching speed.  
Typical Applications:  
- High efficiency step-down converter  
- Portable computers  
- Batterycharger  
- Distributed power  
- PDAs and Mobile Comminicators  
TYPICAL APPLICATION CIRCUIT  
Vi=6V to 28V  
5(11)  
8(14)  
R1  
22K  
VO=2.5V/1.5A  
L5971  
3(4)  
2(3)  
4(5,6)  
L1  
30µH  
7(13)  
1(2) 6(12)  
C1  
47µF  
30V  
C2  
1.2nF  
R3  
R2  
9.1K  
C6  
100nF  
D1  
STPS  
3L40U  
C8  
330µF  
C5  
47nF  
C4  
22nF  
R4  
D98IN832C  
May 2000  
1/11  

L5971 替代型号

型号 品牌 替代类型 描述 数据表
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