Datasheet

9
LT4220
4220f
BLOCK DIAGRA
W
–
+
13
–
+
1.24V
–
+
–1.24V
UVLO
V
CC
AND
V
EE
GOOD
FB
+
6
ON
–
–
+
–
+
–
+
–
+
1.24V
0.5V
1.24V
12
ON
+
FB
–
–1.24V
P GATE
GOOD
N GATE
GOOD
5
TRACK
7
V
EE
V
CC
V
CC
1
GND
9 16
S
R
Q
S
R
Q
S
R
Q
Q
Q
Q
S
R
R
Q
Q
10
PWRGD
GATE GOOD
LATCHES
TRACK OFF
LATCH
TOFF
GATE ON
V
CC
V
CC
FAULT
FAULT
LATCH
TIMER AND LOGIC
11
FAULT
GATE
+
15
SENSE
+
PUMP
I
LIM
V
CC
3µA
10µA
10µA
ON
ON
EN
TRACK
FB
+
60µA
CURRENT LIMIT
FROM SENSE AMPS
–
+
–
+
14
GATE
–
4
SENSEK
4220 BD
2
SENSE
–
3
8
TIMER
WEAK DIODES
SUBSTRATE
+
–
+
–
53mV
52mV