LTC2919HDDB-5#PBF Linear Technology, LTC2919HDDB-5#PBF Datasheet

LTC2919HDDB-5#PBF

Manufacturer Part Number
LTC2919HDDB-5#PBF
Description
Manufacturer
Linear Technology
Datasheet

Specifications of LTC2919HDDB-5#PBF

Voltage Supervisor Type
Voltage Monitor
Number Of Voltage Supervisors
2
Monitored Supervisor Voltage
3.3
Operating Supply Voltage (min)
0.5V
Operating Temperature Classification
Automotive
Operating Temp Range
-40C to 125C
Pin Count
10
Mounting
Surface Mount
Lead Free Status / Rohs Status
Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC2919HDDB-5#PBFLTC2919HDDB-5
Manufacturer:
LT
Quantity:
10 000
FEATURES
APPLICATIO S
TYPICAL APPLICATIO
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%
6.5V Shunt Regulator 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 V
Space Saving 10-Lead 3mm × 2mm DFN and MSOP
Packages
Desktop and Notebook Computers
Network Servers
Core, I/O Monitor
Automotive
3.3V
3.3V UV/OV (Window) Monitor Application with
453k
10.7k
76.8k
200ms Internal Timeout (3.3V Logic Out)
ADJ1
REF
ADJ2
SEL
LTC2919–2.5
U
GND
V
CC
OUT2
OUT1
TMR
RST
2919 TA01a
UV
10k
U
CC
OV
10k
= 0.5V
10k
FAULT
0.1μF
DESCRIPTIO
The LTC
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 fi ltering ensures out-
puts operate reliably without false triggering. An accurate
threshold at the V
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
confi gurable 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.
All other trademarks are the property of their respective owners. Protected by U.S. Patents,
including 6949965, 7292076.
Precision Triple/Dual Input
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
SEL Pin Connection for Input Polarity
Combinations
®
2919 is a triple/dual input monitor intended for a
UV, OV and Negative
ADJ1
+
+
POLARITY
CC
U
Voltage Monitor
pin provides a third input supply
ADJ2
+
LTC2919
SEL PIN
OPEN
GND
V
CC
1
2919f

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LTC2919HDDB-5#PBF Summary of contents

Page 1

... 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. ...

Page 2

... LEAD FREE FINISH TAPE AND REEL LTC2919CDDB-2.5#PBF LTC2919CDDB-2.5#TRPBF LTC2919IDDB-2.5#PBF LTC2919IDDB-2.5#TRPBF LTC2919HDDB-2.5#PBF LTC2919HDDB-2.5#TRPBF LTC2919CDDB-3.3#PBF LTC2919CDDB-3.3#TRPBF LTC2919IDDB-3.3#PBF LTC2919IDDB-3.3#TRPBF LTC2919HDDB-3.3#PBF LTC2919HDDB-3.3#TRPBF LTC2919CDDB-5#PBF LTC2919CDDB-5#TRPBF LTC2919IDDB-5#PBF LTC2919IDDB-5#TRPBF LTC2919HDDB-5#PBF LTC2919HDDB-5#TRPBF LTC2919CMS-2.5#PBF LTC2919CMS-2.5#TRPBF LTC2919IMS-2.5#PBF LTC2919IMS-2.5#TRPBF LTC2919HMS-2.5#PBF LTC2919HMS-2.5#TRPBF LTC2919CMS-3.3#PBF LTC2919CMS-3.3#TRPBF LTC2919IMS-3.3#PBF LTC2919IMS-3.3#TRPBF LTC2919HMS-3.3#PBF LTC2919HMS-3.3#TRPBF LTC2919CMS-5#PBF LTC2919CMS-5#TRPBF LTC2919IMS-5#PBF LTC2919IMS-5#TRPBF LTC2919HMS-5#PBF LTC2919HMS-5#TRPBF Consult LTC Marketing for parts specifi ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T (LTC2919-5), ADJ1 = ADJ2 = 0.55V, SEL = fl oating, unless otherwise noted. (Note 2) SYMBOL PARAMETER V Operating Supply Voltage CC(MIN Shunt Regulation Voltage CC(SHUNT ...

Page 4

LTC2919 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T (LTC2919-5), ADJ1 = ADJ2 = 0.55V, SEL = fl oating, unless otherwise noted. (Note 2) SYMBOL PARAMETER I Allowable Leakage When Open SEL(Z) I SEL Input Current SEL Note ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Propagation Delay vs Overdrive 700 600 500 400 300 200 100 0 0 GLITCH PERCENTAGE PAST THRESHOLD (%) 2919 G07 Shunt Regulation Voltage vs Temperature 7.0 6 10mA CC ...

Page 6

LTC2919 W U TYPICAL PERFOR A CE CHARACTERISTICS OUT1, OUT2, RST V vs Output OL Sink Current 1 PULL- 150° 25° 125°C A 0.4 ...

Page 7

CTIO S (MSOP/DFN Package) ADJ1 (Pin 10): Adjustable Voltage Input 1. Input to volt- age monitor comparator 1 (0.5V nominal threshold). The polarity of the input is selected by the state of the SEL pin ...

Page 8

LTC2919 U U APPLICATIO S I FOR ATIO The LTC2919 is a low power, high accuracy triple/dual supply monitor with two adjustable inputs and an accurate UVLO that can monitor a third supply. Reset timeout may be selected with an ...

Page 9

U U APPLICATIO S I FOR ATIO If the user’s application requires, the SEL pin may be driven using a three-state buffer which satisfi es the V leakage conditions of this three-state input pin. If the state of the SEL ...

Page 10

LTC2919 U U APPLICATIO S I FOR ATIO Table 2b. Possible Combinations of Supply Monitoring. For Example Purposes, All Supplies are Monitored at 5% Tolerance and Connections are Shown Only for ADJ1, ADJ2, REF , SEL, OUT1 and OUT2. Output ...

Page 11

U U APPLICATIO S I FOR ATIO 4.425V ±75mV over temperature (i.e., 10% to 13% below 5V). The monitored system must thus operate reliably down to 4.35V or 13% below 5V over temperature. The above discussion is concerned only with ...

Page 12

LTC2919 U U APPLICATIO S I FOR ATIO To minimize errors arising from ADJ input bias and to minimize loading on REF choose resistor R supply monitoring (for negative supply monitoring the range ...

Page 13

APPLICATIO S I FOR ATIO APPLICATIO S I FOR ATIO If the user wishes to avoid having an external capacitor, the TMR pin should be tied to ground, switching the part to an internal 200ms timer. ...

Page 14

LTC2919 U TYPICAL APPLICATIO S Six Supply Undervoltage Monitor with 2.5V Reset Output and 20ms Timeout 15V 5V –5V –15V 3.3V 2.5V C 100nF R N2A V CC 137k ADJ1 R R N2B N1A LTC2919-2.5 309k 13.3k REF R N1B ...

Page 15

... LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 16

... C BYP 0.1μF +5V R PU2 10k PWRGD R PU3 10k SYS_RESET 2919 TA06 Timing Specifi cations FAIL Pin, RST/RST Outputs/Adjustable Reset Timer CC Pin, Adjustable Reset Timer, H-Grade Temperature Range CC LT 0208 • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2008 2919f ...

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