LTC2919
Precision Triple/Dual Input
UV, OV and Negative
Voltage Monitor
FEATURES DESCRIPTION
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Two Low Voltage Adjustable Inputs (0.5V) The LTC 2919 is a triple/dual input monitor intended for a
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Accurate UVLO Provides a Third Monitor Input variety of system monitoring applications. Polarity selec-
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Open-Drain RST, OUT1 and OUT2 Outputs tion and a buffered reference output allow the LTC2919 to
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Pin Selectable Input Polarity Allows Negative, UV monitor positive and negative supplies for undervoltage
and OV Monitoring (UV) and overvoltage (OV) conditions.
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Guaranteed Threshold Accuracy: 1.5%
The two adjustable inputs have a nominal 0.5V threshold,
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6.5V Shunt Regulator for High Voltage Operation
featuring tight 1.5% threshold accuracy over the entire
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Low 50A Quiescent Current
operating temperature range. Glitch filtering ensures out-
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Buffered 1V Reference for Negative Supply Offset
puts operate reliably without false triggering. An accurate
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Input Glitch Rejection
threshold at the V pin provides a third input supply
CC
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Adjustable Reset Timeout Period
monitor for a 2.5V, 3.3V or 5V supply.
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Selectable Internal Timeout Saves Components
n Two independent output pins indicate the status of each
Outputs Guaranteed Low with V = 0.5V
CC
n adjustable input. A third common output provides a
Space Saving 10-Lead 3mm 2mm DFN and MSOP
configurable reset timeout that may be set by an accu-
Packages
n rate internal 200ms timer, programmed with an external
AEC-Q100 Qualified for Automotive Applications
capacitor, or disabled for a fast response. A three-state
input pin sets the input polarity of each adjustable input
APPLICATIONS
without requiring any external components.
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Desktop and Notebook Computers
The LTC2919 provides a highly versatile, precise, space-
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Network Servers
conscious, micropower solution for supply monitoring.
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Core, I/O Monitor
All registered trademarks and trademarks are the property of their respective owners. Protected
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Automotive
by U.S. patents, including 6949965, 7292076.
TYPICAL APPLICATION
3.3V UV/OV (Window) Monitor Application with
SEL Pin Connection for Input Polarity
200ms Internal Timeout (3.3V Logic Out)
Combinations
3.3V
POLARITY
0.1F
V
CC
453k
10k
ADJ1 ADJ2 SEL PIN
LTC29192.5
10k
ADJ1 OUT1
V
+ +
UV CC
10k
10.7k REF OUT2
OV FAULT
OPEN
RST +
ADJ2
SEL TMR
76.8k
GND
GND
2919 TA01a
Rev. A
1
Document Feedback For more information www.analog.comLTC2919
ABSOLUTE MAXIMUM RATINGS (Notes 1, 2)
Terminal Voltages Operating Temperature Range
V (Note 3) ............................................. 0.3V to 6V LTC2919C ................................................ 0C to 70C
CC
OUT1, OUT2, RST ..................................0.3V to 7.5V LTC2919I ............................................. 40C to 85C
ADJ1, ADJ2 ............................................0.3V to 7.5V LTC2919H .......................................... 40C to 125C
TMR, SEL ..................................0.3V to (V + 0.3V)
Maximum Junction Temperature .......................... 150C
CC
Terminal Currents Storage Temperature Range .................. 65C to 150C
I (Note 3) ...................................................... 10mA Lead Temperature (Soldering, 10 sec)
CC
I .................................................................... 1mA MSOP-10 ...........................................................300C
REF
ADJ1, ADJ2 ........................................................1mA
PIN CONFIGURATION
TOP VIEW
TOP VIEW
1 10
SEL ADJ1
SEL 1 10 ADJ1
2 9
V ADJ2
CC
V 2 9 ADJ2
11 CC
3 8
OUT1 TMR
OUT1 3 8 TMR
GND
OUT2 4 7 REF
4 7
OUT2 REF
RST 5 6 GND
5 6
RST GND
MS PACKAGE
10-LEAD PLASTIC MSOP
DDB PACKAGE
T = 150C, = 120C/W
10-LEAD (3mm 2mm) PLASTIC DFN
JMAX JA
T = 150C, = 76C/W
JMAX JA
EXPOSED PAD (PIN 11) MAY BE LEFT OPEN OR TIED TO GND
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2919CDDB-2.5#TRMPBF LTC2919CDDB-2.5#TRPBF LDGT 10-Lead (3mm 2mm) Plastic DFN 0C to 70C
LTC2919IDDB-2.5#TRMPBF LTC2919IDDB-2.5#TRPBF LDGT 10-Lead (3mm 2mm) Plastic DFN 40C to 85C
LTC2919HDDB-2.5#TRMPBF LTC2919HDDB-2.5#TRPBF LDGT 10-Lead (3mm 2mm) Plastic DFN 40C to 125C
LTC2919CDDB-3.3#TRMPBF LTC2919CDDB-3.3#TRPBF LDMW 10-Lead (3mm 2mm) Plastic DFN 0C to 70C
LTC2919IDDB-3.3#TRMPBF LTC2919IDDB-3.3#TRPBF LDMW 10-Lead (3mm 2mm) Plastic DFN 40C to 85C
LTC2919HDDB-3.3#TRMPBF LTC2919HDDB-3.3#TRPBF LDMW 10-Lead (3mm 2mm) Plastic DFN 40C to 125C
LTC2919CDDB-5#TRMPBF LTC2919CDDB-5#TRPBF LDMX 10-Lead (3mm 2mm) Plastic DFN 0C to 70C
LTC2919IDDB-5#TRMPBF LTC2919IDDB-5#TRPBF LDMX 10-Lead (3mm 2mm) Plastic DFN 40C to 85C
LTC2919HDDB-5#TRMPBF LTC2919HDDB-5#TRPBF LDMX 10-Lead (3mm 2mm) Plastic DFN 40C to 125C
LTC2919CMS-2.5#PBF LTC2919CMS-2.5#TRPBF LTDGS 10-Lead Plastic MSOP 0C to 70C
LTC2919IMS-2.5#PBF LTC2919IMS-2.5#TRPBF LTDGS 10-Lead Plastic MSOP 40C to 85C
LTC2919HMS-2.5#PBF LTC2919HMS-2.5#TRPBF LTDGS 10-Lead Plastic MSOP 40C to 125C
LTC2919CMS-3.3#PBF LTC2919CMS-3.3#TRPBF LTDMT 10-Lead Plastic MSOP 0C to 70C
LTC2919IMS-3.3#PBF LTC2919IMS-3.3#TRPBF LTDMT 10-Lead Plastic MSOP 40C to 85C
LTC2919HMS-3.3#PBF LTC2919HMS-3.3#TRPBF LTDMT 10-Lead Plastic MSOP 40C to 125C
Rev. A
2
For more information www.analog.com