LTC2919
Precision Triple/Dual Input
UV, OV and Negative
Voltage Monitor
DESCRIPTIO
FEATURES
Two Low Voltage Adjustable Inputs (0.5V) The LTC 2919 is a triple/dual input monitor intended for a
Accurate UVLO Provides a Third Monitor Input variety of system monitoring applications. Polarity selec-
Open-Drain RST, OUT1 and OUT2 Outputs tion and a buffered reference output allow the LTC2919 to
Pin Selectable Input Polarity Allows Negative, UV monitor positive and negative supplies for undervoltage
and OV Monitoring (UV) and overvoltage (OV) conditions.
Guaranteed Threshold Accuracy: 1.5%
The two adjustable inputs have a nominal 0.5V threshold,
6.5V Shunt Regulator for High Voltage Operation
featuring tight 1.5% threshold accuracy over the entire
Low 50A Quiescent Current
operating temperature range. Glitch ltering ensures out-
Buffered 1V Reference for Negative Supply Offset
puts operate reliably without false triggering. An accurate
Input Glitch Rejection
threshold at the V pin provides a third input supply
CC
Adjustable Reset Timeout Period
monitor for a 2.5V, 3.3V or 5V supply.
Selectable Internal Timeout Saves Components
Two independent output pins indicate the status of each
Outputs Guaranteed Low With V = 0.5V
CC
adjustable input. A third common output provides a
Space Saving 10-Lead 3mm 2mm DFN and MSOP
con gurable reset timeout that may be set by an accu-
Packages
rate internal 200ms timer, programmed with an external
U
capacitor, or disabled for a fast response. A three-state
APPLICATIO S
input pin sets the input polarity of each adjustable input
Desktop and Notebook Computers
without requiring any external components.
Network Servers
The LTC2919 provides a highly versatile, precise, space-
Core, I/O Monitor
conscious, micropower solution for supply monitoring.
Automotive
, 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.
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
0.1F
V
453k CC
10k
ADJ1 ADJ2 SEL PIN
LTC29192.5
10k
ADJ1 OUT1
UV V
++
CC
10k
10.7k REF OUT2
OV
FAULT
RST
ADJ2 OPEN
+
SEL TMR
76.8k
GND
GND
2919 TA01a
2919f
1
U
ULTC2919
ABSOLUTE AXI U RATI GS (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
PIN CONFIGURATION
TOP VIEW
SEL 1 10 ADJ1 TOP VIEW
V 2 9 ADJ2 SEL 1 10 ADJ1
CC
V 2 9 ADJ2
CC
11
OUT1 3 8 TMR
OUT1 3 8 TMR
OUT2 4 7 REF OUT2 4 7 REF
RST 5 6 GND
RST 5 6 GND
MS PACKAGE
10-LEAD PLASTIC MSOP
DDB PACKAGE
10-LEAD (3mm 2mm) PLASTIC DFN
T = 150C, = 120C/W
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#PBF LTC2919CDDB-2.5#TRPBF LDGT 10-Lead (3mm 2mm) Plastic DFN 0C to 70C
LTC2919IDDB-2.5#PBF LTC2919IDDB-2.5#TRPBF LDGT 10-Lead (3mm 2mm) Plastic DFN 40C to 85C
LTC2919HDDB-2.5#PBF LTC2919HDDB-2.5#TRPBF LDGT 10-Lead (3mm 2mm) Plastic DFN 40C to 125C
LTC2919CDDB-3.3#PBF LTC2919CDDB-3.3#TRPBF LDMW 10-Lead (3mm 2mm) Plastic DFN 0C to 70C
LTC2919IDDB-3.3#PBF LTC2919IDDB-3.3#TRPBF LDMW 10-Lead (3mm 2mm) Plastic DFN 40C to 85C
LTC2919HDDB-3.3#PBF LTC2919HDDB-3.3#TRPBF LDMW 10-Lead (3mm 2mm) Plastic DFN 40C to 125C
LTC2919CDDB-5#PBF LTC2919CDDB-5#TRPBF LDMX 10-Lead (3mm 2mm) Plastic DFN 0C to 70C
LTC2919IDDB-5#PBF LTC2919IDDB-5#TRPBF LDMX 10-Lead (3mm 2mm) Plastic DFN 40C to 85C
LTC2919HDDB-5#PBF 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
LTC2919CMS-5#PBF LTC2919CMS-5#TRPBF LTDMV 10-Lead Plastic MSOP 0C to 70C
LTC2919IMS-5#PBF LTC2919IMS-5#TRPBF LTDMV 10-Lead Plastic MSOP 40C to 85C
LTC2919HMS-5#PBF LTC2919HMS-5#TRPBF LTDMV 10-Lead Plastic MSOP 40C to 125C
Consult LTC Marketing for parts speci ed with wider operating temperature ranges. *Temperature grades are identi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based nish parts.
For more information on lead free part marking, go to: