Datasheet

26
LTC4221
4221fa
TYPICAL APPLICATIO S
U
Sequenced Turn-On
ON2
FAULT
GND
LTC4221
Z1
Z2
1
16
7
10
9
8
FB2
PWRGD2
PWRGD1
PWRGD2
V
OUT1
3.3V
5A
V
OUT2
2.5V
5A
FB1
LONG
LONG
GND
LONG
Z1, Z2: SMAJ10
TIMER
FILTER
234151413
12
11
6
5
ON1
V
CC1
SENSE1 GATE1 V
CC2
SENSE2 GATE2
V
CC1
3.3V
V
CC2
2.5V
BACKPLANE
CONNECTOR
(FEMALE)
PCB EDGE
CONNECTOR
(MALE)
R
X1
10Ω
R
X2
10Ω
R3
14.3k
R4
10k
R2
21k
R1
10k
R
F3
14.3k
Q2
IRF7413
R
F4
5.11k
R
PG2
10k
R
F1
20k
R
F2
5.11k
4221 TA04
C
X1
100nF
C
FILTER
1nF
C
TIMER
470nF
C
X2
100nF
Q1
IRF7413
R
SENSE1
0.004Ω
R
SENSE2
0.004Ω
Simultaneous Turn-On with Autoretry Function—Linked Current Limits
ON2
FAULT
GND
LTC4221
Z1
Z2
1
16
7
10
9
8
FB2
PWRGD2
PWRGD1
PWRGD2
V
OUT1
3.3V
5A
V
OUT2
2.5V
5A
PWRGD1
FB1
LONG
LONG
GND
LONG
Z1, Z2: SMAJ10
TIMER
FILTER
234151413
12
11
6
5
ON1
V
CC1
SENSE1 GATE1 V
CC2
SENSE2 GATE2
V
CC1
3.3V
V
CC2
2.5V
BACKPLANE
CONNECTOR
(FEMALE)
PCB EDGE
CONNECTOR
(MALE)
R
X1
10Ω
R
X2
10Ω
R3
12.4k
R2
16.5k
R1
4.22k
R
F3
14.3k
Q2
IRF7413
R
F4
5.11k
R
PG2
10k
R
PG1
10k
R
F1
20k
R
F2
5.11k
4221 TA03
C
X1
100nF
C
FILTER
1nF
C
TIMER
470nF
C
X2
100nF
Q1
IRF7413
R
SENSE1
0.004Ω
R
SENSE2
0.004Ω