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參數資料
| 型號： | LTC1998I |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 2.5uA, 1% Accurate SOT-23 Comparator and Voltage Reference for Battery Monitoring |
| 中文描述： | 2.5uA，1％精度，采用SOT - 23比較器和電池電壓參考監(jiān)測 |
| 文件頁數： | 4/8頁 |
| 文件大?。?/td> | 143K |
| 代理商： | LTC1998I |
LTC1998
4
1998f
How to Calculate the External Resistor Values
The LTC1998 is a low battery warning indicator and is
especially designed for monitoring the voltage of single-
cell Lithium-Ion batteries. The LTC1998 compares its
supply pin (BATT) to an accurate internal reference; if the
battery voltage falls below the programmed low battery
QUICK DESIGU
PIU
BATT (Pin 1):
Battery Voltage to be monitored. Supply
current is also drawn from this pin. Board layout should
connect this pin to the battery(+) terminal, through a trace
that does not conduct load current.
GND (Pin 2):
Ground should be connected to the battery
(–) terminal through a trace that does not conduct load
return current.
V
TH.A
(Pin 3):
Threshold Adjust Pin. Adjusts the low
battery threshold voltage, V
BATT.Th
= 2.5V + (V
TH.A
/2).
V
TH.A
can be supplied by a voltage source or a resistor
divider.
V
H.A
(Pin 4):
Hysteresis Adjust. Hysteresis threshold
voltage V
TH2
= 2.5V + (V
H.A
/2). V
H.A
can be supplied by a
voltage source or resistor divider. V
H.A
must always be
programmed to a higher potential than V
TH.A
. Hysteresis
voltage, V
HYST
= V
TH2
– V
BATT.Th
.
V
LOGIC
(Pin 5):
Positive Supply Voltage for Output Driver.
This voltage can be driven from an external logic supply or
tied to BATT.
BATTLO (Pin 6):
Output of Comparator. Low for BATT <
V
BATT.Th
(low battery threshold voltage). Output state
guaranteed for V
BATT
≥
1.5V.
Output Low Voltage vs Load
Current
Output High Voltage vs Load
Current
Output Short-Circuit Current vs
Supply Voltage
OUTPUT SINK CURRENT (mA)
1
O
1998 G07
2
3
4
5
0.6
0.4
0.2
0
T
A
= 25
°
C
V
LOGIC
= V
BATT
= 3V
T
A
= –40
°
C
T
A
= 85
°
C
T
A
= 25
°
C
OUTPUT SOURCE CURRENT (mA)
1
O
B
1998 G08
2
3
4
5
0
–50
–100
–150
–200
–250
T
A
= 25
°
C
V
LOGIC
= V
BATT
T
A
= 85
°
C
T
A
= –40
°
C
BATT = 3V
BATT = 5V
T
A
= 25
°
C
T
A
= –40
°
C
T
A
= 85
°
C
T
A
= 25
°
C
SUPPLY VOLTAGE (V)
1.0 1.5
2.5
3.5
4.5
5.5
C
120
100
80
60
40
20
0
2.0
3.0
4.0
5.0
1998 G09
6.0
SOURCE CURRENT,
BATTLO SHORTED TO GND
SINK CURRENT,
BATTLO SHORTED
TO V
LOGIC
TA = 25
°
C
V
BATT
= V
LOGIC
TYPICAL PERFOR U
threshold voltage of the LTC1998, the battery low pin
(BATTLO) will change state, from high to low, to indicate
a low battery condition. The low battery threshold voltage
is programmed via the voltage threshold adjust pin (V
TH.A
).
A hysteresis adjust pin (V
H.A
) will add hysteresis to the
programmed value of the low battery threshold voltage.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC1998IS6#TR | 功能描述:IC DETECT VOLT PR LOBATT SOT23-6 RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:61 系列:- 功能:電源管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應商設備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC1998IS6#TRM | 功能描述:IC DET VOLT PROG LOBATT SOT23-6 RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:61 系列:- 功能:電源管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應商設備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC1998IS6#TRMPBF | 功能描述:IC DETECT VOLT PR LOBATT SOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:61 系列:- 功能:電源管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應商設備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC1998IS6#TRPBF | 功能描述:IC DETECT VOLT PR LOBATT SOT23-6 RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標準包裝:61 系列:- 功能:電源管理 電池化學:鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:4.35 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:22-WFDFN 裸露焊盤 供應商設備封裝:22-DFN（6x3）裸露焊盤 包裝:管件 |
| LTC20 | 制造商:3M Electronic Products Division 功能描述:20 way professional IC test clip,0.3in |
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