Datasheet

11
LT1185
1185ff
Foldback Current Limiting
–
LT1185 • TA03a
V
IN
R4
5.36k
R3
15k
Q1
2N3906
R1
2.37k
+
–
2µF
TANT
REFGND
FB
V
OUT
LT1185V
IN
+
V
OUT
2µF
TANT
R2
2.61k
+
+
Auxiliary + 12V Low Dropout Regulator for Switching Supply
I
OUT
V
OUT
(NORMALIZED)
0.6
0.8
1.0
LT1185 • TA03b
0.4
0.2
0
1.2
1.4
1.6
I
SHORT-CIRCUIT
=
15k
R3
+I
FULL LOAD
=
15k
R3
10.8k
R4
LT1185 • TA04
R
LIM
R1
2.37k
R2
9.76k
12V
REGULATED
AUXILIARY
5V
MAIN
OUTPUT
*
*
5V
CONTROL
PRIMARY
*DIODE CONNECTION INDICATES A FLYBACK
SWITCHING TOPOLOGY, BUT FORWARD
CONVERTERS MAY ALSO BE USED
+
+
+
REF GND
FB
V
OUT
V
IN
LT1185
TYPICAL APPLICATIO S
U