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LTC2931CF#PBF

Description
IC 6 PWR SUPPLY MONITOR 20TSSOP
CategoryPower/power management    The power supply circuit   
File Size260KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric Compare View All

LTC2931CF#PBF Overview

IC 6 PWR SUPPLY MONITOR 20TSSOP

LTC2931CF#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeTSSOP
package instructionTSSOP, TSSOP20,.25
Contacts20
Manufacturer packaging codeF
Reach Compliance Codecompliant
ECCN codeEAR99
Adjustable thresholdYES
Analog Integrated Circuits - Other TypesPOWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 codeR-PDSO-G20
JESD-609 codee3
length6.5 mm
Humidity sensitivity level1
Number of channels6
Number of functions1
Number of terminals20
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Encapsulate equivalent codeTSSOP20,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)250
power supply5 V
Certification statusNot Qualified
Maximum seat height1.1 mm
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)3.3 V
Nominal supply voltage (Vsup)5 V
surface mountYES
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperature40
width4.4 mm
Base Number Matches1
FEATURES
LTC2931
Configurable Six Supply
Monitor with Adjustable Reset
and Watchdog Timers
DESCRIPTION
The LTC
®
2931 is a configurable supply monitor for
systems with up to six supply voltages. One of 16 preset or
adjustable voltage monitor combinations can be selected
using an external resistive divider connected to the mode
select pin. The preset voltage thresholds are accurate
to ±1.5% over temperature. The LTC2931 also features
adjustable inputs with a 0.5V nominal threshold. All six
open-drain voltage comparator outputs are connected to
separate pins for individual supply monitoring.
The reset and watchdog timeout periods are adjustable
using external capacitors. Tight voltage threshold accuracy
and glitch immunity ensure reliable reset operation without
false triggering. The
RST
output is guaranteed to be in the
correct state for V
CC
down to 1V. Each status output has
a weak internal pull-up and may be externally pulled up
to a user defined voltage.
The 52μA supply current makes the LTC2931 ideal for
power conscious systems and it may be configured to
monitor fewer than six inputs.
L,
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 6967591, 7239251, 7119714.
Simultaneously Monitors Six Supplies
16 User Selectable Combinations of
5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V and ± Adjustable
Voltage Thresholds
Guaranteed Threshold Accuracy: ±1.5%
Adjustable Reset and Watchdog Timeout
Low Supply Current: 52μA
Comparator/Monitor Output for Each Supply
Power Supply Glitch Immunity
Guaranteed
RST
for V
CC
≥ 1V
High Temperature Operation to 125°C
20-Lead TSSOP Package
APPLICATIONS
Desktop and Notebook Computers
Multivoltage Systems
Telecom Equipment
Portable Battery-Powered Equipment
Network Servers
Automotive
TYPICAL APPLICATION
Six Supply Monitor 12V (ADJ), 5V, 3.3V, 2.5V, 1.8V, 1.2V (ADJ)
12V
5V
3.3V
2.5V
1.8V
1.2V
10k
2150k
1%
124k
1%
COMP1
COMP2
COMP3
COMP4
COMP5
V1
V2
0.1μF
0.1μF
100k
1%
100k
1% R1
59k
1%
R2
40.2k
1%
V3
V4
V5
V6
VREF
VPG
GND
CWT
C
WT
47nF
CRT
RST
2931 TA01
Voltage Threshold Configuration Table
V1 (V) V2 (V) V3 (V) V4 (V) V5 (V) V6 (V)
5.0
3.3
2.5
1.8
ADJ
ADJ
5.0
3.3
2.5
1.5
ADJ
ADJ
5.0
3.3
2.5
ADJ
ADJ
ADJ
5.0
3.3
1.8
ADJ
ADJ
ADJ
5.0
3.3
1.8
–ADJ ADJ
ADJ
5.0
3.3
ADJ
ADJ
ADJ
ADJ
5.0
3.3
ADJ –ADJ ADJ
ADJ
5.0
3.0
2.5
ADJ
ADJ
ADJ
5.0
3.0
1.8
ADJ
ADJ
ADJ
5.0
3.0
ADJ
ADJ
ADJ
ADJ
3.3
2.5
1.8
1.5
ADJ
ADJ
3.3
2.5
1.8
ADJ
ADJ
ADJ
3.3
2.5
1.8
–ADJ ADJ
ADJ
3.3
2.5
1.5
ADJ
ADJ
ADJ
3.3
2.5
ADJ
ADJ
ADJ
ADJ
3.3
2.5
ADJ –ADJ ADJ
ADJ
SYSTEM
LOGIC
POWER
GOOD
COMP6
WDI
LTC2931
WDO
t
RST
= 94ms
t
WD
= 940ms
C
RT
47nF
2931fb
1

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Description IC 6 PWR SUPPLY MONITOR 20TSSOP IC 6 PWR SUPPLY MONITOR 20TSSOP IC 6 PWR SUPPLY MONITOR 20TSSOP IC 6 PWR SUPPLY MONITOR 20TSSOP IC 6 PWR SUPPLY MONITOR 20TSSOP IC 6 PWR SUPPLY MONITOR 20TSSOP
Brand Name Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology
Is it Rohs certified? conform to conform to conform to conform to conform to conform to
Maker Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI )
Parts packaging code TSSOP TSSOP TSSOP TSSOP TSSOP TSSOP
package instruction TSSOP, TSSOP20,.25 TSSOP, TSSOP20,.25 TSSOP, TSSOP20,.25 TSSOP, TSSOP20,.25 TSSOP, TSSOP20,.25 TSSOP, TSSOP20,.25
Contacts 20 20 20 20 20 20
Manufacturer packaging code F F F F F F
Reach Compliance Code compliant compliant compliant compliant compliant compliant
ECCN code EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Adjustable threshold YES YES YES YES YES YES
Analog Integrated Circuits - Other Types POWER SUPPLY MANAGEMENT CIRCUIT POWER SUPPLY MANAGEMENT CIRCUIT POWER SUPPLY MANAGEMENT CIRCUIT POWER SUPPLY MANAGEMENT CIRCUIT POWER SUPPLY MANAGEMENT CIRCUIT POWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 code R-PDSO-G20 R-PDSO-G20 R-PDSO-G20 R-PDSO-G20 R-PDSO-G20 R-PDSO-G20
JESD-609 code e3 e3 e3 e3 e3 e3
length 6.5 mm 6.5 mm 6.5 mm 6.5 mm 6.5 mm 6.5 mm
Humidity sensitivity level 1 1 1 1 1 1
Number of channels 6 6 6 6 6 6
Number of functions 1 1 1 1 1 1
Number of terminals 20 20 20 20 20 20
Maximum operating temperature 70 °C 125 °C 85 °C 125 °C 70 °C 85 °C
Minimum operating temperature - -40 °C -40 °C -40 °C - -40 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code TSSOP TSSOP TSSOP TSSOP TSSOP TSSOP
Encapsulate equivalent code TSSOP20,.25 TSSOP20,.25 TSSOP20,.25 TSSOP20,.25 TSSOP20,.25 TSSOP20,.25
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 250 250 250 250 250 250
power supply 5 V 5 V 5 V 5 V 5 V 5 V
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height 1.1 mm 1.1 mm 1.1 mm 1.1 mm 1.1 mm 1.1 mm
Maximum supply voltage (Vsup) 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V
Minimum supply voltage (Vsup) 3.3 V 3.3 V 3.3 V 3.3 V 3.3 V 3.3 V
Nominal supply voltage (Vsup) 5 V 5 V 5 V 5 V 5 V 5 V
surface mount YES YES YES YES YES YES
technology CMOS CMOS CMOS CMOS CMOS CMOS
Temperature level COMMERCIAL AUTOMOTIVE INDUSTRIAL AUTOMOTIVE COMMERCIAL INDUSTRIAL
Terminal surface Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn)
Terminal form GULL WING GULL WING GULL WING GULL WING GULL WING GULL WING
Terminal pitch 0.65 mm 0.65 mm 0.65 mm 0.65 mm 0.65 mm 0.65 mm
Terminal location DUAL DUAL DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature 40 40 40 40 40 40
width 4.4 mm 4.4 mm 4.4 mm 4.4 mm 4.4 mm 4.4 mm
Base Number Matches 1 1 1 1 1 1
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