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LTC2953IDD-2-TRPBF PDF预览

LTC2953IDD-2-TRPBF

更新时间: 2024-02-11 03:17:57
品牌 Logo 应用领域
凌特 - Linear 监控控制器
页数 文件大小 规格书
20页 199K
描述
Push Button On/Off Controller with Voltage Monitoring

LTC2953IDD-2-TRPBF 技术参数

是否Rohs认证: 符合生命周期:Transferred
零件包装代码:DFN包装说明:HVSON, SOLCC12,.12,20
针数:12Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:7.5可调阈值:YES
模拟集成电路 - 其他类型:POWER SUPPLY SUPPORT CIRCUITJESD-30 代码:S-PDSO-N12
JESD-609代码:e3长度:3 mm
湿度敏感等级:1信道数量:1
功能数量:1端子数量:12
最高工作温度:85 °C最低工作温度:-40 °C
封装主体材料:PLASTIC/EPOXY封装代码:HVSON
封装等效代码:SOLCC12,.12,20封装形状:SQUARE
封装形式:SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度(摄氏度):260
电源:2.7/28 V认证状态:Not Qualified
座面最大高度:0.8 mm子类别:Power Management Circuits
最大供电电流 (Isup):0.026 mA最大供电电压 (Vsup):27 V
最小供电电压 (Vsup):2.7 V表面贴装:YES
技术:CMOS温度等级:INDUSTRIAL
端子面层:Matte Tin (Sn)端子形式:NO LEAD
端子节距:0.45 mm端子位置:DUAL
处于峰值回流温度下的最长时间:30宽度:3 mm
Base Number Matches:1

LTC2953IDD-2-TRPBF 数据手册

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LTC2953  
TYPICAL APPLICATIONS  
Push Button Buffer  
Disconnect Input Resistive Divider To Save Power  
The circuit of Figure 16 shows the power fail comparator  
In order to prolong battery life when system power has  
been turned off, the LTC2953-2 power fail comparator can  
beusedtodisconnecttheexternalbatterymonitorresistive  
sensing the push button input. The PFO output toggles  
each time the push button crosses 0.5V. This application  
provides an early warning of push button activity.  
divider. The circuit in Figure 18 connects PFI to EN and  
PFO to the bottom end of the resistive divider.  
8.4V  
PFO  
R14  
1070k  
R5  
100k  
R9  
100k  
+
0.5V  
PFI  
PB  
UVLO  
PFO  
V
EN  
IN  
R12  
110k  
ON/OFF  
2953 F16  
PFI  
+
0.5V  
Figure 16. Push Button Buffer  
LTC2953-2  
Power Path Switching  
2953 F18  
The high voltage EN output of the LTC2953-2 is designed  
to switch On/Off an external power PFET. This allows a  
user to connect/disconnect a power supply (or battery)  
Figure 18. Disconnect Input Resistive Divider to Save Power  
When the user presses the push button to turn on system  
power (EN low), the output of the power fail comparator  
to its load by toggling the PB pin. Figure 17 shows the  
LTC2953-2 in a 12V wall adapter application.  
asserts PFO low. The low battery external resistive divider  
is thus enabled to monitor the input supply. If the voltage  
on the UVLO input falls to less than 0.5V, a system power  
down sequence is initiated. Note that the IR drop across  
the internal NFET is typically less than 0.2mV when the  
UVLO pin voltage is 0.5V.  
12V  
TO LOAD  
R5  
100k  
R9  
100k  
PB  
V
EN  
IN  
Once system power has been turned off (EN high), the  
external resistive divider is disconnected and thus con-  
sumes zero DC current.  
ON/OFF  
LTC2953-2  
2953 F17  
Figure 17. Power Path Switching  
2953f  
16  

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