LTC2966
100V Micropower Dual
Voltage Monitor
FEATURES DESCRIPTION
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Wide Operating Range: 3.5V to 100V The LTC 2966 is a low current, high voltage dual channel
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Wide Monitoring Range: 1.75V to 98V voltage monitor. Internal high value resistors sense the
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Quiescent Current: 7A input monitor pins providing a compact and low power
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Adjustable Threshold Range solution for voltage monitoring. Each channel includes
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Internal High Value Resistive Dividers two comparator reference inputs (INH/INL) to allow con-
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1.4% (Max) Threshold Accuracy Over Temperature figuration of a high and low threshold using an external
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Polarity Selection resistive divider biased from the on-chip reference. Range
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100V Rated Outputs selection pins are provided for each channel to set the
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Selectable Built-In Hysteresis internal resistive dividers for 5x, 10x, 20x and 40x scaling.
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20-Lead SW and 16-Lead 3mm 3mm QFN The thresholds are scaled according to the range selection
Packages settings. Additionally, either INH or INL can be grounded
to enable built-in hysteresis. Polarity selection pins allow
each output to be inverted. The outputs are 100V capable
APPLICATIONS
and include a 500k pull-up resistor to an internal supply.
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Portable Equipment
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog
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Battery-Powered Equipment
Devices, Inc. All other trademarks are the property of their respective owners.
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Telecom Systems
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Automotive/Industrial Electronics
TYPICAL APPLICATION
Dual Undervoltage Monitor
RANGE
V MONITOR RANGE SELECTION
48V IN
24V
5V 1.75V* to 12.25V 5x
3.5V to 24.5V 10x
V V
INA INB
REF
100k 100k
7V to 49V 20x
200k
48V UNDERVOLTAGE
INHA OUTA
14V to 98V 40x
THRESHOLD
5V
91k
LTC2966
CONFIGURATION
*Requires either V or V > 3.5V
SYS
INA INB
INLA
24V UNDERVOLTAGE
909k
INHB OUTB
Supply Current vs V
INA(B)
INLB
12
PSA RS1A RS2A PSB RS1B RS2B GND
10
8
6
POLARITY AND RANGE SELECTION
CHANNEL
4
A B
40.03V 20.0V RANGE = 40x 45C
RISING THRESHOLD
36.4V 18.2V
FALLING THRESHOLD OUTA(B) = LOW 25C
2
3.6V 1.8V
HYSTERESIS V = GND 90C
INB(A)
20x 10x
RANGE
2966 TA01a I = 0A 125C
REF
0
0 20 40 60 80 100
V (V)
INA
2966 TA01b
2966fc
1
For more information www.linear.com/LTC2966
I (A)
VA(B)LTC2966
ABSOLUTE MAXIMUM RATINGS (Notes 1, 2)
Input Voltages Operating Ambient Temperature Range
V , V ............................................ 0.3V to 140V LTC2966C ................................................ 0C to 70C
INA INB
PSA, PSB, RS1A, RS1B, RS2A, RS2B ...... 0.3V to 6V LTC2966I .............................................40C to 85C
INHA, INHB, INLA, INLB .......................... 0.3V to 6V LTC2966H .......................................... 40C to 125C
Output Voltages Storage Temperature Range .................. 65C to 150C
OUTA, OUTB ........................................ 0.3V to 140V Lead Temperature (Soldering, 10 sec) ...................300C
Average Currents
V , V ........................................................20mA
INA INB
OUTA, OUTB ......................................................5mA
REF ....................................................................5mA
INHA, INHB, INLA, INLB ....................................1mA
PIN CONFIGURATION
TOP VIEW
TOP VIEW
V 1
20 V
INA INB
2
NC 19 NC
16 15 14 13
OUTA 3
18 OUTB
REF 1 12 GND
NC 4
17 NC
INHA 2 11 INHB
17
REF 5
16 GND
GND
INLA 3 10 INLB
INHA 6
15 INHB
RS1A RS1B
4 9
INLA 7
14 INLB
5 6 7 8
RS1A 8
13 RS1B
RS2A 9
12 RS2B
UD PACKAGE
PSA 10
11 PSB
16-LEAD (3mm 3mm) PLASTIC QFN
T = 150C, = 68C/W SW PACKAGE
JMAX JA
EXPOSED PAD (PIN 17) PCB GND CONNECTION OPTIONAL 20-LEAD PLASTIC SO
T = 150C, = 35C/W
JMAX JA
ORDER INFORMATION