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LTC2954IDDB-1 PDF预览

LTC2954IDDB-1

更新时间: 2024-01-10 13:48:45
品牌 Logo 应用领域
凌特 - Linear 电源电路电源管理电路微处理器光电二极管控制器
页数 文件大小 规格书
16页 582K
描述
Push Button On/Off Controller with μP Interrupt

LTC2954IDDB-1 技术参数

是否无铅: 含铅是否Rohs认证: 符合
生命周期:Active包装说明:HVSON,
针数:8Reach Compliance Code:compliant
风险等级:5.11可调阈值:YES
模拟集成电路 - 其他类型:POWER SUPPLY SUPPORT CIRCUITJESD-30 代码:R-PDSO-N8
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:8
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
封装形状:RECTANGULAR封装形式:SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度(摄氏度):260认证状态:Not Qualified
座面最大高度:0.8 mm最大供电电压 (Vsup):26.4 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:0.5 mm端子位置:DUAL
处于峰值回流温度下的最长时间:30宽度:2 mm
Base Number Matches:1

LTC2954IDDB-1 数据手册

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LTC2954  
U
TYPICAL APPLICATIO S  
KILL voltage below V  
circuit 30µs later. Since the PDT pin is open circuited, the  
power down debounce time defaults to 64ms.  
, the EN pin becomes an open  
capacitor extends the length of time (beyond 64ms) that  
the PB input must be held low before releasing the enable  
output.  
KILL(TH)  
PB Pin in a Noisy Environment  
High Voltage Power Path Switching  
The rugged PB pin is designed to operate in noisy envi-  
The high voltage EN open drain output of the LTC2954-2  
is designed to switch on/off an external power PFET. This  
allows a user to connect/disconnect a power supply (or  
battery) to its load by toggling the PB pin. Figure 7 shows  
the LTC2954-2 controlling a two cell Li-Ion battery ap-  
plication. The KILL pin is connected to the output of the  
PFET through a resistive divider. The KILL pin serves as  
ronments. Transients below ground (>6V) and above V  
IN  
(<33V) will not damage the rugged PB pin. Additionally,  
the PB pin can withstand ESD HBM strikes up to ±10kV.  
In order to keep external noise from coupling inside the  
LTC2954, place an R-C network close to the PB pin. A  
5.1k resistor and a 0.1µF capacitor should suffice for most  
noisy applications (see Figure 8).  
a voltage monitor. When V  
drops below 6V, causing a  
OUT  
V
OUT  
M1  
R5  
100K  
V
,TRIP POINT = 6V  
OUT  
R9  
100K  
R1  
909k  
1%  
4.2V  
+
SINGLE CELL  
Li-Ion BATTERY  
V
EN  
IN  
C4  
0.1µF  
CERAMIC  
LTC2954-2  
INT  
OPTIONAL GLITCH  
FILTER CAPACITOR  
4.2V  
SINGLE CELL  
Li-Ion BATTERY  
+
PB  
KILL  
PDT  
V
= 0.6V INPUT  
*OPTIONAL  
TH  
GND ONT  
R4  
100k  
1%  
C3*  
0.1µF  
C
*
ONT  
0.033µF  
2954 F07  
Figure 7. Power Path Control with 6V Under Voltage Detect  
V
IN  
PARASITICS  
TRACE  
CAPACITANCE  
EN  
R6  
5.1k  
V
IN  
LTC2954-1  
ONT  
PB  
INT  
NOISE  
KILL  
PDT  
TRACE  
INDUCTANCE  
C5  
0.1µF  
GND  
DETAILS OMITTED  
FOR CLARITY  
2954 F08  
Figure 8. Noisy PB Trace  
2954f  
13  

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