LTC2919
Precision Triple/Dual Input
UV, OV and Negative
Voltage Monitor
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DESCRIPTIO
FEATURES
The LTC®2919 is a triple/dual input monitor intended for a
variety of system monitoring applications. Polarity selec-
tion and a buffered reference output allow the LTC2919 to
monitor positive and negative supplies for undervoltage
(UV) and overvoltage (OV) conditions.
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Two Low Voltage Adjustable Inputs (0.5V)
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Accurate UVLO Provides a Third Monitor Input
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Open-Drain RST, OUT1 and OUT2 Outputs
Pin Selectable Input Polarity Allows Negative, UV
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and OV Monitoring
Guaranteed Threshold Accuracy: 1.5ꢀ
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The two adjustable inputs have a nominal 0.5V threshold,
featuring tight 1.5% threshold accuracy over the entire
operating temperature range. Glitch filtering ensures out-
puts operate reliably without false triggering. An accurate
threshold at the V pin provides a third input supply
monitor for a 2.5V, 3.3V or 5V supply.
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6.5V Shunt Regulator for High Voltage Operation
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Low 50μA Quiescent Current
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Buffered 1V Reference for Negative Supply Offset
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Input Glitch Rejection
Adjustable Reset Timeout Period
CC
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Selectable Internal Timeout Saves Components
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Two independent output pins indicate the status of each
adjustable input. A third common output provides a
configurable reset timeout that may be set by an accu-
rate internal 200ms timer, programmed with an external
capacitor, or disabled for a fast response. A three-state
input pin sets the input polarity of each adjustable input
without requiring any external components.
Outputs Guaranteed Low With V = 0.5V
CC
Space Saving 10-Lead 3mm × 2mm DFN and MSOP
Packages
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APPLICATIO S
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Desktop and Notebook Computers
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Network Servers
The LTC2919 provides a highly versatile, precise, space-
conscious, micropower solution for supply monitoring.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents,
including 6949965, 7292076.
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Core, I/O Monitor
Automotive
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TYPICAL APPLICATIO
3.3V UV/OV (Window) Monitor Application with
200ms Internal Timeout (3.3V Logic Out)
SEL Pin Connection for Input Polarity
Combinations
3.3V
POLARITY
0.1μF
V
CC
453k
10k
ADJ1
+
ADJ2
+
SEL PIN
LTC2919–2.5
10k
ADJ1
OUT1
OUT2
RST
UV
V
CC
10k
10.7k
76.8k
REF
OV
FAULT
OPEN
GND
ADJ2
SEL
+
–
TMR
–
–
GND
2919 TA01a
2919f
1