LT4256-3
8
42563fa
BLOCK DIAGRA
W
+
–
–
+
–
+
108µA
V
P
V
P
3mV
LOGIC
2V
14mV TO 55mV
9.8V
4V
4V
V
CC
INTERNAL
UV
TIMER LOW
TIMER HIGH
GND
0.65V
4.65V
–
+
–
+
3.99V3.99V
7V
100k
PWRGD
TIMER
4256 BD
V
CC
SENSE
V
P
GEN
FB
OV
3µA
UV
RETRY
GATE
V
OUT
OPEN
+
–
+
–
+
–
CHARGE
PUMP
AND
GATE
DRIVER
+
–
REF GEN
16 15
OPEN
CIRCUIT
4
12
13
5
9
8
CURRENT
LIMIT
FOLDBACK
10
7
1
2
UV
OV
