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MIC2778-2BM5 PDF预览

MIC2778-2BM5

更新时间： 2024-11-17 22:54:51
品牌 Logo 应用领域
麦瑞 - MICREL /
页数 文件大小 规格书
8页 69K
描述
Voltage Monitor with Adjustable Hysteresis Preliminary Information

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MIC2778-2BM5 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：SOT-23
包装说明：SOT-23, 5 PIN针数：5
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.13
可调阈值：YES模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码：R-PDSO-G5JESD-609代码：e0
长度：2.9 mm湿度敏感等级：1
信道数量：1功能数量：1
端子数量：5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：LSSOP封装等效代码：TSOP5/6,.11,37
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：240电源：1.5/5.5 V
认证状态：Not Qualified座面最大高度：1.45 mm
子类别：Power Management Circuits最大供电电流 (Isup)：0.002 mA
最大供电电压 (Vsup)：5.5 V最小供电电压 (Vsup)：1.5 V
表面贴装：YES温度等级：INDUSTRIAL
端子面层：Tin/Lead (Sn85Pb15)端子形式：GULL WING
端子节距：0.95 mm端子位置：DUAL
阈值电压标称：+1.24V处于峰值回流温度下的最长时间：30
宽度：1.6 mmBase Number Matches：1

MIC2778-2BM5 数据手册

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MIC2778  
Voltage Monitor with Adjustable Hysteresis  
Preliminary Information  
General Description  
Features  
The MIC2778 is a voltage monitor—uniquely designed to  
detect two separate voltage thresholds—combined with a  
delay generator and logic. It is designed for monitoring the  
battery supply of portable digital systems, particularly PDAs,  
pagers, and cellular telephones.  
• Optimized for PDAs, cellular telephones, pagers,  
and other battery-powered devices  
• Independently adjustable high- and  
low-voltage thresholds  
• Internal logic prevents battery-voltage-fluctuation chatter  
• High ±2% voltage threshold accuracy; 1% available  
• Built in 140ms (minimum) delay deglitches output  
• Extremely low 1µA typical supply current  
• For applications not requiring built-in delay, see MIC833  
• Immune to brief power supply transients  
• 5-lead SOT-23 package  
High- and low-voltage thresholds can be adjusted indepen-  
dently,allowingforwidehysteresis.Voltagedetectionthresh-  
olds are accurate to 2%.  
Ifthebatteryvoltagefallsbelowthelow-voltagethreshold,the  
output (RST) is asserted and latched, preventing system  
operation until the battery is replaced or recharged. Internal  
logic prevents the output from chattering due to battery  
recovery or load removal. The output is asserted for 140ms  
(minimum) when a fresh battery is inserted. For applications  
not requiring built-in delay, see MIC833.  
Applications  
• PDAs  
• Pagers  
The IC’s power supply input is separate from the detector  
inputs, allowing the MIC2778 to be powered from a down-  
stream supply, such a boost converter. Supply current is  
extremely low (1µA, typical), making it ideal for portable  
applications.  
• Cordless phones  
• Consumer electronics  
• Embedded controllers  
• Personal electronics  
A high-precision 1% grade is available. The MIC2778 is  
supplied in Micrel’s IttyBitty™ 5-lead SOT-23-5 package.  
Ordering Information  
Part Number  
Marking  
UFB  
Accuracy  
2%  
Temperature Range  
–40°C to +85°C  
Package  
SOT-23-5  
SOT-23-5  
MIC2778-2BM5  
MIC2778-1BM5  
UFA  
1%  
–40°C to +85°C  
Typical Application  
VOUT  
3.0V  
MIC5207-3.0BM5  
OUT  
BYP  
GND  
IN  
470pF  
4.7µF  
MIC2778  
Li-Ion  
Cell  
100k  
604k  
1%  
VDD  
LTH  
RST  
EN  
56k  
1%  
HTH GND  
340k  
1%  
V
BAT(hi) = 3.6V  
VBAT(lo) = 3.1V  
Cellular Telephone Battery Monitor  
IttyBitty™ is a trademark of Micrel, Inc.  
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com  
October 1999  
1
MIC2778  
12345678

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