LTC2960
36V Nano-Current
Two Input Voltage Monitor
FEATURES
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
voltageconditionstobedetectedwitheitheranon-inverting
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850nA Quiescent Current
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Operating Range: 2.5V < V < 36V
CC
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1.5% (Max) Accuracy Over Temperature
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Adjustable Reset Threshold
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Wide Temperature Range (–40°C to 125°C)
+
–
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Adjustable IN /IN Threshold
Manual Reset Input
Compact 2mm × 2mm 8-lead DFN and
TSOT-23 (ThinSOT™) Packages
+
input, IN (LTC2960-1/LTC2960-3) or an inverting input,
APPLICATIONS
–
IN (LTC2960-2/LTC2960-4). A manual reset (MR) input
is provided for external activation of the reset output.
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Portable Equipment
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Battery Powered Equipment
Other options provided on the LTC2960-1/LTC2960-2 in-
cludearesettimeoutperiodselectpin,RT,toselectbetween
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-
cuitstoanoutputlogicsupplypin(LTC2960-3/LTC2960-4)
or 36V open-drain outputs (LTC2960-1/LTC2960-2).
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Security Systems
Automotive Systems
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LTC2960 Option Table
Option
Inputs
Reset Timeout Period
15ms/200ms
15ms/200ms
200ms
Output Type
36V Open-Drain
36V Open-Drain
Active Pull-up
Active Pull-up
+
LTC2960-1
LTC2960-2
LTC2960-3
LTC2960-4
ADJ/IN
ADJ/IN
ADJ/IN
ADJ/IN
–
+
–
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.
200ms
TYPICAL APPLICATION
Battery and Regulator Monitor
Supply Current vs Supply Voltage
1200
6V < V < 8.4V
IN
MR=5V, 27C
V
OUT
LTC3632
1.8V
DC/DC
Li-Ion
4.2V
+
R2
R4
900
600
300
0
6.04M
1.3M
GND
C1
0.1μF
50V
C2
1μF
LTC2960-3
V
DV
CC
CC
+
IN
RST
RESET
LOW BATTERY
R1
402k
Li-Ion
4.2V
OUT
ADJ
+
MR
GND
R3
402k
2960 TA01
0
8
16
V
24
(V)
32
40
CC
POWER-FAIL FALLING THRESHOLD = 6.410V
RESET FALLING THRESHOLD = 1.693V
2960 TA01a
2960f
1