LTC2924 Linear Technology, LTC2924 Datasheet - Page 16

• Manufacturer Part Number: LTC2924
• Description: Quad Power Supply Sequencer
• Manufacturer: Linear Technology

LTC2924
16
TYPICAL APPLICATIO S
5V EARLY*
*5V EARLY MUST BE ON BEFORE
SEQUENCING SUPPLIES
CONTROLLER
SYSTEM
POWER SUPPLY 1
POWER SUPPLY 3
POWER SUPPLY 2
POWER SUPPLY 4
10k
U
10k
150nF
SHDN
Power On Sequence Timer Delay Longer
Shutdown Pin Power Supply Sequencer
150nF
than Power Off Sequence Timer Delay
150nF
3.3V
SHDN
150nF
5V
SHDN
2N7002 POWER ON TIMER DELAY = 30ms
1.6V
IN1
IN2
IN3
IN4
ON
TMR
SHDN
LTC2924
2.5V
GND
POWER OFF TIMER DELAY = 15ms
V
V
OUT1
OUT2
OUT3
OUT4
ON
DONE
FAULT
TMR
PGT
CC
CC
FAULT
DONE
OUT1
OUT2
OUT3
OUT4
LTC2924
PGT
GND
V
CC
HYS/CFG
IN1
IN2
IN3
IN4
2924 TA04
0.1µF
V
CC
0.1µF
10k
49.9k
2924 TA03
24.9k
9.31k
11.81k
15.8k
49.9k
7.87k
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33.2k
8.45k
V
V
V
V
V
V
V
V
ON
OFF
ON
OFF
ON
OFF
ON
OFF
≥ 3.01V
≤ 2.68V
≥ 4.49V
≤ 3.99V
≥ 1.43V
≤ 1.27V
≥ 2.25V
≤ 2V
2924fa