Datasheet

13
LT1083/LT1084/LT1085
TYPICAL APPLICATIONS
U
High Efficiency Regulator with Switching Preregulator
Automatic Light Control
+
–
+
V
IN

28V
28V
470Ω
240Ω
2k
28V
4N28
1N914
1N914
LT1011
10k
10k
10k
1k
1M
MR1122

1mH
10,000µF
V
OUT
LT1083 OUTIN
ADJ


1083/4/5 ADJ TA06
1.2V to 15V Adjustable Regulator 5V Regulator with Shutdown*
Protected High Current Lamp Driver
IN
V
IN
OUT
TTL
ADJ
1k
1k
10µF
100µF
V
OUT

5V
LT1083
2N3904
1083/4/5 ADJ TA09
+
121Ω
1%
365Ω
1%
+
*OUTPUT SHUTS DOWN TO 1.3V
IN
OUT
ADJ
R2
1k
C1*
10µF
V
OUT
†
V
IN
LT1083
1083/4/5 ADJ TA08
+
C2
100µF
+
R1
90.9Ω
*NEEDED IF DEVICE IS FAR FROM FILTER CAPACITORS
†
V
OUT
= 1.25V 1 +
R2
R1
(
)
IN
V
IN
OUT
ADJ
10µF
100µF
LT1083
1083/4/5 ADJ TA10
1.2k
+
OUT
TTL OR
CMOS
IN
ADJ
15V
12V
5A
LT1083
1083/4/5 ADJ TA11
10k