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LTC1728ES5-1.8#TRM

Description
Processor Supervisor 3.086V/2.338V/Adj 3 Active Low/Open Drain Automotive 5-Pin TSOT-23 T/R
File Size185KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric View All

LTC1728ES5-1.8#TRM Overview

Processor Supervisor 3.086V/2.338V/Adj 3 Active Low/Open Drain Automotive 5-Pin TSOT-23 T/R

LTC1728ES5-1.8#TRM Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesNot Compliant
ECCN (US)EAR99
Part StatusUnconfirmed
HTS8542.39.00.01
SVHCYes
SVHC Exceeds ThresholdYes
Number of Supervisors3
Maximum Reset Active Time (ms)200
Output DriverActive Low/Open Drain
Minimum Reset Threshold Voltage (V)3.036|2.3|Adj
Typical Reset Threshold Voltage (V)3.086|2.338|Adj
Maximum Reset Threshold Voltage (V)3.135|2.375|Adj
Monitored Voltage (V)Adj|3.3|2.5
Minimum Operating Supply Voltage (V)1
Maximum Operating Supply Voltage (V)7
Maximum Supply Current (uA)20
Power Fail DetectionNo
Watchdog TimerNo
Manual ResetYes
Chip Enable SignalsNo
Battery Backup SwitchingNo
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeExtended
PackagingTape and Reel
TypeVoltage Monitor
Pin Count5
Standard Package NameSOT-23
Supplier PackageTSOT-23
MountingSurface Mount
Package Height0.9(Max)
Package Length2.9
Package Width1.75(Max)
PCB changed5
Lead ShapeGull-wing
FeaTures
n
LTC1727/LTC1728
Micropower Precision
Triple Supply Monitors
in 8-Lead MSOP and
5-Lead SOT-23 Packages
DescripTion
The LTC
®
1727 is a triple supply monitor intended for
systems with multiple supply voltages. Each supply moni-
tor has its own open-drain output for individual supply
monitoring. A common open-drain reset output remains
low until all three supplies have been in compliance for
200ms. Tight 1.5% accuracy specifications and glitch
immunity ensure reliable reset operation without false
triggering.
The LTC1728 is functionally identical to the LTC1727
without the individual monitor outputs.
The
RST
output is guaranteed to be in the correct state
for V
CC5
/V
CC25
/V
CC18
or V
CC3
down to 1V. The LTC1727/
LTC1728 may also be configured to monitor any one or
two V
CC
inputs instead of three, depending on system
requirements.
Very low (10µA typical) supply current makes the LTC1727/
LTC1728 ideal for power conscious systems.
The LTC1727 is available in an 8-lead MSOP or SO pack-
age and the LTC1728 is available in a 5-lead SOT-23
package.
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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Monitors Three Inputs Simultaneously
LTC1727-5: 5V, 3.3V and ADJ
LTC1727-2.5: 2.5V, 3.3V and ADJ
LTC1728-5: 5V, 3.3V and ADJ
LTC1728-2.5: 2.5V, 3.3V and ADJ
LTC1728-1.8: 3V, 1.8V and ADJ
LTC1728-3.3: 3.3V, 1.8V and ADJ
±1.5% Threshold Accuracy Over Temperature
Very Low Supply Current: 10µA Typ
200ms Reset Time Delay
Active Low RESET Output
Power Supply Glitch Immunity
Guaranteed
RESET
for V
CC3
≥ 1V
or V
CC5
/V
CC25
/V
CC18
≥ 1V
LTC1727 Includes Monitor Output for Each Supply
LTC1727: 8-Lead MSOP and SO Packages
LTC1728: 5-Lead SOT-23 Package
applicaTions
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Desktop Computers
Notebook Computers
Intelligent Instruments
Portable Battery-Powered Equipment
Network Servers
Typical applicaTion
DC/DC
CONVERTER
3.3V
5V
1.8V
SYSTEM
LOGIC
Triple Supply Monitor with Power Good Output
(3.3V, 2.5V and Adjustable)
1
2
3
R2
4
LTC1727-2.5
V
CC3
COMP3
8
7
6
5
1727/28 TA08
5
V
CC3
V
CC5
V
CCA
RST
1
3.3V
2.5V
2
ADJUSTABLE
SUPPLY
R1
R3
10k
R4
10k
LTC1728-5
4
0.1µF
0.1µF
R1
61.9k
1% 3
R2
100k
1%
POWER
GOOD
SYSTEM
RESET
V
CC25
COMP25
V
CCA
GND
RST
COMPA
GND
1727/28 TA01
17278fb
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