LTC1728ES5-5#TR Linear Technology, LTC1728ES5-5#TR Datasheet

IC MON TRPL MCRPWR TSOT23-5

LTC1728ES5-5#TR

Manufacturer Part Number
LTC1728ES5-5#TR
Description
IC MON TRPL MCRPWR TSOT23-5
Manufacturer
Linear Technology
Type
Multi-Voltage Supervisorr
Datasheet

Specifications of LTC1728ES5-5#TR

Number Of Voltages Monitored
3
Output
Open Drain or Open Collector
Reset
Active Low
Reset Timeout
140 ms Minimum
Voltage - Threshold
3.086V, 4.675V, Adj
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
TSOT-23-5, TSOT-5, TSOP-5
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC1728ES5-5#TRLTC1728ES5-5
Manufacturer:
LINEAR
Quantity:
5 321
Company:
Part Number:
LTC1728ES5-5#TRPBF
Manufacturer:
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Quantity:
63 000
Company:
Part Number:
LTC1728ES5-5#TRPBF
Manufacturer:
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Quantity:
20 000
applicaTions
Typical applicaTion
FeaTures
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
Monitors Three Inputs Simultaneously
±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
or V
LTC1727 Includes Monitor Output for Each Supply
LTC1727: 8-Lead MSOP and SO Packages
LTC1728: 5-Lead SOT-23 Package
Desktop Computers
Notebook Computers
Intelligent Instruments
Portable Battery-Powered Equipment
Network Servers
CONVERTER
DC/DC
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
CC5
/V
0.1µF
CC25
3.3V
5V
1.8V
/V
0.1µF
CC18
≥ 1V
CC3
R1
61.9k
1%
R2
100k
1%
≥ 1V
5
4
3
V
V
V
CC3
CC5
CCA
LTC1728-5
1727/28 TA01
GND
RST
1
2
SYSTEM
LOGIC
DescripTion
The LTC
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
LTC1728 may also be configured to monitor any one or
two V
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.
ADJUSTABLE
5-Lead SOT-23 Packages
SUPPLY
CC5
CC
/V
Triple Supply Monitor with Power Good Output
®
inputs instead of three, depending on system
1727 is a triple supply monitor intended for
Micropower Precision
CC25
Triple Supply Monitors
R1
in 8-Lead MSOP and
/V
(3.3V, 2.5V and Adjustable)
3.3V
2.5V
CC18
R2
LTC1727/LTC1728
or V
1
2
3
4
V
V
V
GND
CC3
CC25
CCA
LTC1727-2.5
CC3
COMP25
down to 1V. The LTC1727/
COMP3
COMPA
RST
1727/28 TA08
8
7
6
5
R3
10k
R4
10k
POWER
GOOD
SYSTEM
RESET
17278fb
1

Related parts for LTC1728ES5-5#TR

LTC1728ES5-5#TR Summary of contents

Page 1

... 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. Triple Supply Monitor with Power Good Output ...

Page 2

... CC18 S5 PACKAGE 5-LEAD PLASTIC SOT- 125°C, θ = 250°C/W JMAX JA ORDER S5 PART NUMBER PART MARKING LTC1728ES5-1.8 LTPH LTIA LTC1728ES5-2.5 LTYP LTC1728ES5-3.3 LTC1728ES5-5 LTHZ LTC1728HS5-5 LTHZ denotes specifications which l = 3.3V 5V, CC3 CC5 MIN TYP MAX UNITS 3.036 3.086 3.135 l 4.600 4.675 4 ...

Page 3

2.5V unless otherwise noted. CC25 CCA CC3 SYMBOL PARAMETER I V Supply Current VCC3 CC3 I V Supply Current VCC25 CC25 ...

Page 4

LTC1727/LTC1728 elecTrical cHaracTerisTics LTC1728-3.3 The denotes specifications which apply over the full operating temperature range, otherwise specifications are 25° 3.3V 1.8V CC3 CC18 CCA SYMBOL PARAMETER V Reset Threshold V ...

Page 5

Typical perForMance cHaracTerisTics V Input Current CCA vs Input Voltage 2 25°C A 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 1 0.80 0.85 0.90 0.95 1.05 1.10 1.15 INPUT VOLTAGE (V) 1727/28 G01 Reset Pulse Width vs ...

Page 6

LTC1727/LTC1728 Typical perForMance cHaracTerisTics V Threshold Voltage CC25 vs Temperature (LTC1727-2.5/LTC1728-2.5) 2.3750 2.3675 2.3600 2.3525 2.3450 2.3375 2.3300 2.3225 2.3150 2.3075 2.3000 –60 –40 – TEMPERATURE (°C) 1727/28 G10 I vs Temperature VCC18 (LTC1728-1.8/LTC1728-3.3) 1.5 ...

Page 7

FuncTions (LTC1727/LTC1728) V (Pin 1/Pin 5): 3.3V Sense Input and Power Supply CC3 Pin. (3V Sense Input and Power Supply Pin for LTC1728- 1.8.) This pin provides power to the part when the voltage greater than ...

Page 8

LTC1727/LTC1728 block DiagraMs V 1 CC3 POWER DETECT V / CC5 2 V CC25 V 3 CCA GND 4 8 LTC1727-5/LTC1727-2.5 – INTERNAL CC – + 200ms PULSE GENERATOR – 200ms DELAY + BANDGAP REFERENCE V CC3 6µA ...

Page 9

DiagraMs V 5 CC3 POWER DETECT V / CC5 CC25 V CC18 V 3 CCA GND 2 TiMing DiagraM V CCX RST COMPX LTC1728-5/LTC1728-2.5/LTC1728-1.8/LTC1728-3.3 – INTERNAL CC 200ms PULSE GENERATOR – 200ms + DELAY ...

Page 10

LTC1727/LTC1728 applicaTions inForMaTion Supply Monitoring The LTC1727 is a low power, high accuracy triple sup- ply monitoring circuit with three monitor outputs and a 200ms microprocessor reset output. The LTC1728 is a low power, high accuracy triple supply monitoring circuit ...

Page 11

Override Functions (5V Versions Only) The V pin, if unused, can be tied to either V CCA V . This is an obvious solution since the trip points for CC5 V and V will always be greater than ...

Page 12

LTC1727/LTC1728 applicaTions inForMaTion Figure 4 contains a simple circuit for 5V systems that can’t risk the RST output going high in the 3.1V to 4.15V range (possibly due to very slow rise time on the 5V supply). Diode D1 powers ...

Page 13

Typical applicaTions ADJUSTABLE SUPPLY ADJUSTABLE SUPPLY LTC1435 ADJUSTABLE RESET TRIP THRESHOLD 2.74V Dual Supply Monitor (3.3V and 5V, Defeat V LTC1728 3.3V V RST SYSTEM RESET CC3 CC5 3 V CCA 2 GND 1727/28 TA04 ...

Page 14

LTC1727/LTC1728 package DescripTion 0.889 ± 0.127 (.035 ± .005) 5.23 3.20 – 3.45 (.206) (.126 – .136) MIN 0.42 ± 0.038 0.65 (.0256) (.0165 ± .0015) TYP BSC RECOMMENDED SOLDER PAD LAYOUT .050 BSC .245 MIN .030 ±.005 TYP RECOMMENDED ...

Page 15

... SC-74A (EIAJ) FOR ORIGINAL JEDEC MO-193 FOR THIN 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. S5 Package ...

Page 16

... Adjustable RESET and Watchdog Time Outs Adjustable RESET and Watchdog Time Outs Push-Pull RESET Output, SOT-23 www.linear.com ● RST CC3 LTC1728-5 V CC5 2 V GND CCA 1727/28 TA02 V CCA = ( TRIP – CCA Timing Specifications FAIL LT 0207 REV B • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 1999 17278fb ...

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