LTC2960_15 Datasheet, PDF (1/18 Pages) Linear Technology – 36V Nano-Current Two-Input Voltage Monitor

Features
n _{850nA Quiescent Current}
n _{Operating Range: 2.5V < VCC < 36V}
n _{1.5% (Max) Accuracy Over Temperature}
n _{Adjustable Reset Threshold}
n _{Wide Temperature Range (–40°C to 125°C)}
n _{Adjustable IN}⁺_/IN^– _Threshold
n _{Manual Reset Input}
n _{Compact 2mm × 2mm 8-lead DFN and}
TSOT-23 (ThinSOT™) Packages
Applications
n _{Portable Equipment}
n _{Battery Powered Equipment}
n _{Security Systems}
n _{Automotive Systems}
LTC2960 Option Table
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
36V Nano-Current
Two-Input Voltage Monitor
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.
Typical Application
Battery and Regulator Monitor
6V < V_IN < 8.4V
Li-Ion ₊
4.2V
C1
0.1µF
50V
R2
6.04M
Li-Ion ₊
R1
4.2V
402k
LTC2960-3
V_CC DV_CC
IN⁺
RST
OUT
MR ADJ
GND
LTC3632
DC/DC
GND
RESET
LOW BATTERY
POWER-FAIL FALLING THRESHOLD = 6.410V
RESET FALLING THRESHOLD = 1.693V
R4
1.3M
V_OUT
1.8V
C2
1µF
R3
402k
2960 TA01
Supply Current vs Supply Voltage
1200
MR=5V, 27C
900
600
300
0
0
8
16
24
32
40
V_CC (V)
2960 TA01a
For more information www.linear.com/LTC2960
2960fa
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