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Linear Technology Electronic Components Datasheet

LTC2919 Datasheet

Precision Triple/Dual Input UV OV and NegativeVoltage Monitor

No Preview Available !

FEATURES
Two Low Voltage Adjustable Inputs (0.5V)
Accurate UVLO Provides a Third Monitor Input
Open-Drain RST, OUT1 and OUT2 Outputs
Pin Selectable Input Polarity Allows Negative, UV
and OV Monitoring
Guaranteed Threshold Accuracy: ±1.5%
www.Da6t.a5SVheSeht4uUn.ct oRmegulator for High Voltage Operation
Low 50μA Quiescent Current
Buffered 1V Reference for Negative Supply Offset
Input Glitch Rejection
Adjustable Reset Timeout Period
Selectable Internal Timeout Saves Components
Outputs Guaranteed Low With VCC = 0.5V
Space Saving 10-Lead 3mm × 2mm DFN and MSOP
Packages
U
APPLICATIO S
Desktop and Notebook Computers
Network Servers
Core, I/O Monitor
Automotive
LTC2919
Precision Triple/Dual Input
UV, OV and Negative
Voltage Monitor
DESCRIPTIO
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.
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 VCC pin provides a third input supply
monitor for a 2.5V, 3.3V or 5V supply.
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.
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.
TYPICAL APPLICATIO
3.3V UV/OV (Window) Monitor Application with
200ms Internal Timeout (3.3V Logic Out)
3.3V
453k
10.7k
76.8k
VCC
LTC2919–2.5
ADJ1 OUT1
REF OUT2
ADJ2
RST
SEL TMR
GND
10k
10k
UV
OV
0.1μF
10k
FAULT
2919 TA01a
SEL Pin Connection for Input Polarity
Combinations
POLARITY
ADJ1
ADJ2
SEL PIN
+ + VCC
+ – OPEN
– – GND
2919f
1


Linear Technology Electronic Components Datasheet

LTC2919 Datasheet

Precision Triple/Dual Input UV OV and NegativeVoltage Monitor

No Preview Available !

LTC2919
ABSOLUTE AXI U RATI GS (Notes 1, 2)
Terminal Voltages
VOCUCT(1N, oOtUeT32),..R...S..T.....................................................................–..0–.03.V3Vtoto7.65VV
ADJ1, ADJ2 .......................................... –0.3V to 7.5V
TMR, SEL..................................–0.3V to (VCC + 0.3V)
Terminal Currents
ICC (Note 3)......................................................±10mA
IREF ....................................................................±1mA
Operating Temperature Range
LTC2919C ................................................ 0°C to 70°C
LTC2919I..............................................– 40°C to 85°C
LTC2919H .......................................... –40°C to 125°C
Maximum Junction Temperature........................... 150°C
Storage Temperature Range...................– 65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MSOP-10 .......................................................... 300°C
wwwP.DIaNtaShCeOet4UN.cFomIGURATION
TOP VIEW
SEL 1
VCC 2
OUT1 3
OUT2 4
RST 5
10 ADJ1
9 ADJ2
11 8 TMR
7 REF
6 GND
DDB PACKAGE
10-LEAD (3mm × 2mm) PLASTIC DFN
TJMAX = 150°C, θJA = 76°C/W
EXPOSED PAD (PIN 11) MAY BE LEFT OPEN OR TIED TO GND
SEL 1
VCC 2
OUT1 3
OUT2 4
RST 5
TOP VIEW
10 ADJ1
9 ADJ2
8 TMR
7 REF
6 GND
MS PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 120°C/W
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 0°C to 70°C
LTC2919IDDB-2.5#PBF
LTC2919HDDB-2.5#PBF
LTC2919CDDB-3.3#PBF
LTC2919IDDB-2.5#TRPBF
LTC2919HDDB-2.5#TRPBF
LTC2919CDDB-3.3#TRPBF
LDGT
LDGT
LDMW
10-Lead (3mm × 2mm) Plastic DFN
10-Lead (3mm × 2mm) Plastic DFN
10-Lead (3mm × 2mm) Plastic DFN
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
LTC2919IDDB-3.3#PBF LTC2919IDDB-3.3#TRPBF LDMW
10-Lead (3mm × 2mm) Plastic DFN –40°C to 85°C
LTC2919HDDB-3.3#PBF LTC2919HDDB-3.3#TRPBF LDMW
LTC2919CDDB-5#PBF LTC2919CDDB-5#TRPBF LDMX
10-Lead (3mm × 2mm) Plastic DFN
10-Lead (3mm × 2mm) Plastic DFN
–40°C to 125°C
0°C to 70°C
LTC2919IDDB-5#PBF LTC2919IDDB-5#TRPBF
LDMX
10-Lead (3mm × 2mm) Plastic DFN –40°C to 85°C
LTC2919HDDB-5#PBF
LTC2919CMS-2.5#PBF
LTC2919HDDB-5#TRPBF
LTC2919CMS-2.5#TRPBF
LDMX
LTDGS
10-Lead (3mm × 2mm) Plastic DFN
10-Lead Plastic MSOP
–40°C to 125°C
0°C to 70°C
LTC2919IMS-2.5#PBF LTC2919IMS-2.5#TRPBF LTDGS
10-Lead Plastic MSOP
–40°C to 85°C
LTC2919HMS-2.5#PBF LTC2919HMS-2.5#TRPBF LTDGS
10-Lead Plastic MSOP
–40°C to 125°C
LTC2919CMS-3.3#PBF LTC2919CMS-3.3#TRPBF LTDMT
10-Lead Plastic MSOP
0°C to 70°C
LTC2919IMS-3.3#PBF LTC2919IMS-3.3#TRPBF LTDMT
10-Lead Plastic MSOP
–40°C to 85°C
LTC2919HMS-3.3#PBF LTC2919HMS-3.3#TRPBF LTDMT
10-Lead Plastic MSOP
–40°C to 125°C
LTC2919CMS-5#PBF
LTC2919CMS-5#TRPBF
LTDMV
10-Lead Plastic MSOP
0°C to 70°C
LTC2919IMS-5#PBF
LTC2919IMS-5#TRPBF
LTDMV
10-Lead Plastic MSOP
–40°C to 85°C
LTC2919HMS-5#PBF
LTC2919HMS-5#TRPBF
LTDMV
10-Lead Plastic MSOP
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *Temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
2919f
2


Part Number LTC2919
Description Precision Triple/Dual Input UV OV and NegativeVoltage Monitor
Maker Linear Technology
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LTC2919 Datasheet PDF






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