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L7981 PDF预览

L7981

更新时间: 2024-11-14 12:48:15
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
页数 文件大小 规格书
44页 1321K
描述
3 A step-down switching regulator

L7981 技术参数

是否Rohs认证: 符合生命周期:Obsolete
零件包装代码:QFP包装说明:HVSON, SOLCC8,.12,20
针数:8Reach Compliance Code:unknown
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.64Is Samacsys:N
其他特性:ALSO OPERATES IN ADJUSTABLE MODE FROM 0.6 V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:4.5 V
标称输入电压:12 VJESD-30 代码:S-XDSO-N8
JESD-609代码:e4长度:3 mm
湿度敏感等级:3功能数量:1
端子数量:8最高工作温度:125 °C
最低工作温度:-40 °C最大输出电流:3 A
封装主体材料:UNSPECIFIED封装代码:HVSON
封装等效代码:SOLCC8,.12,20封装形状:SQUARE
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):260
认证状态:Not Qualified座面最大高度:1 mm
子类别:Switching Regulator or Controllers表面贴装:YES
切换器配置:BUCK最大切换频率:275 kHz
温度等级:AUTOMOTIVE端子面层:Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式:NO LEAD端子节距:0.5 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:3 mmBase Number Matches:1

L7981 数据手册

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L7981  
3 A step-down switching regulator  
Features  
3 A DC output current  
4.5 V to 28 V input voltage  
Output voltage adjustable from 0.6 V  
VFQFPN8 3x3  
HSOP8 exposed pad  
250 kHz switching frequency, programmable  
up to 1 MHz  
Description  
Internal soft-start and enable  
Low dropout operation: 100% duty cycle  
Voltage feed-forward  
The L7981 is a step down switching regulator with  
3.7 A (minimum) current limited embedded power  
MOSFET, so it si able to deliver up to 3 A current  
to the load depending on the application  
conditions.  
Zero load current operation  
Overcurrent and thermal protection  
VFQFPN3x3-8L and HSOP8 package  
The input voltage can range from 4.5 V to 28 V,  
while the output voltage can be set starting from  
Applications  
0.6 V to V .  
IN  
Requiring a minimum set of external components,  
the device includes an internal 250 kHz switching  
frequency oscillator that can be externally  
adjusted up to 1 MHz.  
Consumer:  
STB, DVD, DVD recorder, car audio, LCD TV  
and monitors  
Industrial:  
PLD, PLA, FPGA, chargers  
The QFN and the HSOP packages with exposed  
pad allow reducing the R  
40°C/W respectively.  
down to 60°C/W and  
thJA  
Networking: XDSL, modems, DC-DC modules  
Computer:  
Optical storage, hard disk drive, printers,  
audio/graphic cards  
Suitable for LED driving  
Figure 1.  
Application circuit  
July 2010  
Doc ID 15182 Rev 3  
1/44  
www.st.com  
44  

L7981 替代型号

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3 A step-down switching regulator

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