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LTC1728 参数 Datasheet PDF下载

LTC1728图片预览
型号: LTC1728
PDF下载: 下载PDF文件 查看货源
内容描述: 36V纳米双电流输入电压监视器 [36V Nano-Current Two Input Voltage Monitor]
分类和应用: 监视器
文件页数/大小: 16 页 / 237 K
品牌: LINEAR [ LINEAR INTEGRATED SYSTEMS ]
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LTC2960
36V Nano-Current
Two Input Voltage Monitor
FEATURES
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DESCRIPTION
The LTC
®
2960 is a nano-current, high voltage two input
voltage monitor, ideally suited for multicell battery ap-
plications. External resistive dividers configure custom
comparator thresholds. The supervisory circuit monitors
the ADJ input and pulls the
RST
output low when the input
drops below threshold. A reset timeout period delays the
return of the
RST
output to a high state when the input
rises above the threshold. The spare comparator allows
voltage conditions to be detected with either a non-inverting
input, IN
+
(LTC2960-1/LTC2960-3) or an inverting input,
IN
(LTC2960-2/LTC2960-4). A manual reset (MR) input
is provided for external activation of the reset output.
Other options provided on the LTC2960-1/LTC2960-2 in-
clude a reset timeout period select pin, RT, to select between
15ms or 200ms reset timeout periods. The LTC2960-3/
LTC2960-4 have a fixed 200ms reset timeout period. The
RST
and OUT outputs are available with active pull-up cir-
cuits to an output logic supply pin (LTC2960-3/LTC2960-4)
or 36V open-drain outputs (LTC2960-1/LTC2960-2).
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
850nA Quiescent Current
Operating Range: 2.5V < V
CC
< 36V
1.5% (Max) Accuracy Over Temperature
Adjustable Reset Threshold
Wide Temperature Range (–40°C to 125°C)
Adjustable IN
+
/IN
Threshold
Manual Reset Input
Compact 2mm
×
2mm 8-lead DFN and
TSOT-23 (ThinSOT™) Packages
APPLICATIONS
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Portable Equipment
Battery Powered Equipment
Security Systems
Automotive Systems
Option
LTC2960-1
LTC2960-2
LTC2960-3
LTC2960-4
Inputs
ADJ/IN
+
ADJ/IN
ADJ/IN
+
ADJ/IN
Reset Timeout Period
15ms/200ms
15ms/200ms
200ms
200ms
Output Type
36V Open-Drain
36V Open-Drain
Active Pull-up
Active Pull-up
LTC2960 Option Table
TYPICAL APPLICATION
Battery and Regulator Monitor
6V < V
IN
< 8.4V
Li-Ion
4.2V
1200
LTC3632
DC/DC
GND
LTC2960-3
V
CC
DV
CC
IN
Li-Ion
4.2V
+
Supply Current vs Supply Voltage
V
OUT
1.8V
R4
1.3M
I
CC
(nA)
C2
1μF
900
MR=5V,
27C
+
C1
0.1μF
50V
R2
6.04M
600
RST
OUT
ADJ
GND
RESET
LOW BATTERY
R3
402k
2960 TA01
+
R1
402k
MR
300
0
0
8
16
24
V
CC
(V)
32
40
2960 TA01a
POWER-FAIL FALLING THRESHOLD = 6.410V
RESET FALLING THRESHOLD = 1.693V
2960f
1