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LTC2924CGN

Description
Processor Supervisor 4 Open Drain 16-Pin SSOP N Tube
File Size344KB,22 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Download user manual Parametric Compare View All

LTC2924CGN Overview

Processor Supervisor 4 Open Drain 16-Pin SSOP N Tube

LTC2924CGN 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 Supervisors4
Output DriverOpen Drain
Monitored Voltage (V)3 to 6
Minimum Operating Supply Voltage (V)3
Maximum Operating Supply Voltage (V)6
Maximum Supply Current (uA)3000
Power Fail DetectionNo
Watchdog TimerNo
Manual ResetNo
Chip Enable SignalsNo
Battery Backup SwitchingNo
Minimum Operating Temperature (°C)0
Maximum Operating Temperature (°C)70
Supplier Temperature GradeCommercial
PackagingTube
TypePower Supply Sequencer
Pin Count16
Standard Package NameSOP
Supplier PackageSSOP N
MountingSurface Mount
Package Height1.5(Max)
Package Length4.98(Max)
Package Width3.99(Max)
PCB changed16
Lead ShapeGull-wing
FeaTures
n
n
n
n
n
LTC2924
Quad Power Supply
Sequencer
DescripTion
The LTC
®
2924 is a power supply sequencer designed for
use with external N-channel MOSFETs or power supplies
with shutdown pins. Four power supplies can be fully
sequenced by a single LTC2924 and up to five supplies
can be sequenced to a sixth master supply. The LTC2924
requires a minimum of external components, using only
two feedback resistors per sequenced power supply and
a single resistor to set hysteresis.
An internally regulated charge pump provides gate drive
voltages for external logic and sub-logic-level MOSFETs.
Adding a single capacitor enables an adjustable time delay
between power supplies during both Power On and Power
Off sequencing. A second capacitor can be added to enable
a power good timer for detecting the failure of any power
supply to turn on within the selected time. Errors in power
supply sequencing and the control input are detected and
reported at the
FAULT
output. The LTC2924 features pre-
cision input comparators which can provide 1% accuracy
in monitoring power supply voltages.
Multiple LTC2924s may be easily cascaded to sequence a
virtually unlimited number of power supplies.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
n
n
n
n
n
n
Fully Sequence and Monitor Four Supplies
– Six with Minimal External Circuitry
Cascadable for Additional Supplies
Power Off in Reverse Order or Simultaneously
Charge Pump Drives External MOSFETs
Drives Power Supply Shutdown Pins with No
External Pull-Up Resistors
10µA Output Current Allows Soft-Starting of Supplies
Done Indicator for Both Power On and Power Off
Adjustable Time Delay Between Power Supplies
Power Good Timer
Power Supply Voltage Monitoring and Power
Sequence Error Detection and Reporting
Available in a 16-Lead Narrow SSOP Package
applicaTions
n
n
Sequenced Power Supplies for ASICs with Multiple
I/O and Core Voltages
Latch-Up Prevention in Systems with Multiple Power
Supplies
Typical applicaTion
3.3V
SHDN
1V
Q2
V
ON
= 2.64V
V
OFF
= 1.98V
V
ON
= 0.93V
V
OFF
= 0.915V
V
ON
= 3.97V
V
OFF
= 2.97V
V
ON
= 2.79V
V
OFF
= 2.73V
V
CC
OUT1
5V EARLY
10k
SYSTEM
CONTROLLER
10k
OUT2
OUT3
OUT4
ON LTC2924
DONE
FAULT
TMR
150nF
150nF
PGT
HYS/CFG
GND
49.9k
Q1-Q4: IRL3714S
ALL RESISTORS 1%
5V/DIV
2V/DIV
5V/DIV
2924 TA01a
Power-Up Sequence
2V/DIV
5V
3.3V
3V
1V
5V/DIV
2V/DIV
5V/DIV
10ms/DIV
2924 TA01b
5V
3V
5V
SHDN
Q1
DONE
TMR
ON
0.1µF
6.04k
IN1
IN2
IN3
IN4
1.69k
100k
1.62k
66.5k
Power-Down Sequence
2V/DIV
18.2k
3.09k
20k
5V
3.3V
3V
1V
DONE
TMR
ON
10ms/DIV
2924 TA01c
2924fb
1

LTC2924CGN Related Products

LTC2924CGN LTC2924IGN#TR LTC2924IGN
Description Processor Supervisor 4 Open Drain 16-Pin SSOP N Tube Processor Supervisor 4 Open Drain 16-Pin SSOP N T/R Processor Supervisor 4 Open Drain 16-Pin SSOP N Tube
EU restricts the use of certain hazardous substances Not Compliant Not Compliant Not Compliant
ECCN (US) EAR99 EAR99 EAR99
Part Status Unconfirmed Unconfirmed Unconfirmed
HTS 8542.39.00.01 8542.39.00.01 8542.39.00.01
SVHC Yes Yes Yes
SVHC Exceeds Threshold Yes Yes Yes
Number of Supervisors 4 4 4
Output Driver Open Drain Open Drain Open Drain
Monitored Voltage (V) 3 to 6 3 to 6 3 to 6
Minimum Operating Supply Voltage (V) 3 3 3
Maximum Operating Supply Voltage (V) 6 6 6
Maximum Supply Current (uA) 3000 3000 3000
Power Fail Detection No No No
Watchdog Timer No No No
Manual Reset No No No
Chip Enable Signals No No No
Battery Backup Switching No No No
Minimum Operating Temperature (°C) - -40 -40
Maximum Operating Temperature (°C) 70 85 85
Supplier Temperature Grade Commercial Industrial Industrial
Packaging Tube Tape and Reel Tube
Type Power Supply Sequencer Power Supply Sequencer Power Supply Sequencer
Pin Count 16 16 16
Standard Package Name SOP SOP SOP
Supplier Package SSOP N SSOP N SSOP N
Mounting Surface Mount Surface Mount Surface Mount
Package Height 1.5(Max) 1.5(Max) 1.5(Max)
Package Length 4.98(Max) 4.98(Max) 4.98(Max)
Package Width 3.99(Max) 3.99(Max) 3.99(Max)
PCB changed 16 16 16
Lead Shape Gull-wing Gull-wing Gull-wing
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