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LTC2953IDD-2-TRPBF PDF预览

LTC2953IDD-2-TRPBF

更新时间: 2024-01-05 17:20:17
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 Controlled μP Reset  
Push Button Controlled Supply Sequencing  
The circuit of Figure 19 can be used to keep a μP in reset  
for200msafterthepushbuttonhasenabledsystempower.  
After system power has stabilized, the voltage monitor  
input continues to monitor the supply at the load end.  
The circuit in Figure 20 uses the LTC2953-2 to sequence  
3 supply rails. Power on sequencing begins by pressing  
the push button for 32ms. This asserts the EN output low,  
whichturnsontheV1supply.200msafterV1reaches80ꢀ  
of its final value (2.66V), the V2 supply is enabled. When  
the V2 DC voltage reaches 80ꢀ of its final value (2V), the  
V3 supply is enabled. Note that there is no internal delay  
TO LOAD  
3.3V  
R5  
100k  
R9  
100k  
from the PFI input to the PFO output and so V3 is enabled  
at the same time V2 rises above 2V.  
R3  
499k  
V
EN  
IN  
A power down supply sequence begins when any of these  
PB  
VM  
LTC2953-2  
R2  
100k  
R11  
510k  
inputs is asserted: PB , UVLO or KILL . When EN pulls up  
ON/OFF  
to V , V1 disconnects first. When V1 decays to 2.66V, V2  
is immediately disabled (there is no 200ms delay from Vꢁ  
to RST during power down). When V2 decays to 2V, V3 is  
immediately disabled. See Figure 21 timing diagram.  
IN  
RST  
2953 F19  
PB  
PB  
POWER ON  
32ms  
POWER OFF  
0.5V  
VM  
200ms  
RST  
EN  
V1  
V2  
V3  
Figure 19. Push Button Controlled μP Reset  
80%  
80%  
80%  
V1  
3.3V  
3.3V  
200ms  
R5  
100k  
R9  
100k  
80%  
R3  
866k  
V
EN  
IN  
PB  
VM  
V
= 2.66V  
TH  
R2  
LTC2953-2  
200k  
ON/OFF  
2953 F21  
V
Figure 21. Push Button Controlled Supply Sequence Timing  
IN  
DC/DC  
#1  
V2  
2.5V  
V
SHDN OUT  
RST  
PFI  
R15  
V
= 2.01V  
604k  
TH  
R16  
200k  
V
IN  
DC/DC  
#2  
V3  
1.8V  
V
SHDN OUT  
PFO  
2953 F20  
Figure 20. Push Button Controlled Supply Sequencing  
2953f  
17  

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