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参数资料
| 型号： | LTC1998IS6#TRM |
| 厂商： | Linear Technology |
| 文件页数： | 12/12页 |
| 文件大小： | 0K |
| 描述： | IC DET VOLT PROG LOBATT SOT23-6 |
| 标准包装： | 500 |
| 功能： | 过压/欠压保护 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 1 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 细型，TSOT-23-6 |
| 供应商设备封装： | TSOT-23-6 |
| 包装： | 带卷 (TR) |
| 其它名称： | LTC1998IS6 LTC1998IS6-ND |
LTC1998
TYPICAL APPLICATIONS
Single Li-Ion Cell Low Battery Detector
Backup Battery Switchover Circuit
+
5
V TH.A BATTLO
V BATT =
1.5V TO 4.2V
R1
1%
R2
1%
R3
1%
REGULATOR
0.1μF
1
BATT
4
V H.A V LOGIC
LTC1998
3 6
GND
2
V LOGIC =
1V TO 5V
μP
2.5V TO 4.2V
+
R1
787k
1% 4
R2
68.1k
1% 3
R3
147k
1%
1
BATT
V H.A V LOGIC
LTC1998
V TH.A BATTLO
GND
2
5
6
BAT54C
R4
1M
BAT54C
MBRM120
+
V OUT
Si2301
Si2301
3V
BACKUP
BATTERY
1998 TA01
SWITCHES TO BACKUP BATTERY WHEN PRIMARY FALLS BELOW 2.7V.
Micropower 2.9V V CC Threshold
Detector with 15mV Hysteresis
SWITCHES BACK TO PRIMARY WHEN VOLTAGE RECOVERS TO ≥ 2.8V
1998 TA04
3.3V
High Accuracy Window Comparator
with Dual Hysteresis
R1
715k
1
V IN
V +
5
4
3
6
GND
2
1% BATT
V H.A V LOGIC
R2
9.09k LTC1998
1%
V TH.A BATTLO OUT
R3
274k
1%
LOW THRESHOLD = 2.9V
HYSTERESIS = 15mV
1998 TA03
R1
619k
1%
R2
6.04k
1%
R3
383k
1%
4
3
1
BATT
V H.A V LOGIC
LTC1998
V TH.A BATTLO
GND
2
5
6
2N7002
R7
1M
V OUT
V OUT = V + WHEN
2.6V ≤ V IN ≤ 3.1V
Low Battery Load Reduction Circuit
R4
909k
1
5
V TH.A BATTLO
+
R1
787k
1%
R2
68.1k
1%
R3
147k
1%
4
3
REGULATOR
1
BATT
V H.A V LOGIC
LTC1998
6
GND
2
Si2301
CRITICAL
CIRCUITRY
NONCRITICAL
CIRCUITRY
1%
R5
6.98k
1%
R6
76.8k
1%
4
3
BATT
V H.A V LOGIC
LTC1998
V TH.A BATTLO
GND
2
5
NC
6
WINDOW LOW THRESHOLD = 2.6V
HYSTERESIS = 10mV
WINDOW HIGH THRESHOLD = 3.1V
HYSTERESIS = 10mV
1998 TA06
LOW THRESHOLD = 2.7V
HYSTERESIS = 100mV
RELATED PARTS
1998 TA05
PART NUMBER
LTC1440/LTC1540
LTC1441/LTC1442
LTC1443/LTC1444/LTC1445
DESCRIPTION
Micropower Comparator with 1% Reference
Micropower Dual Comparator with 1% Reference
Micropower Quad Comparator with 1% Reference
COMMENTS
1.182V ±1% Reference, ±10mV (Max) Input Offset
1.182V ±1% Reference (LTC1442)
LTC1443 has 1.182V Reference, LTC1444/LTC1445 have 1.221V
Reference and Adjustable Hysteresis
1998fb
12 Linear Technology Corporation
(408) 432-1900 ● FAX: (408) 434-0507 www.linear.com
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
LT 0809 REV B ? PRINTED IN USA
? LINEAR TECHNOLOGY CORPORATION 2001
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