Datasheet

LT1083/LT1084/LT1085
15
108345fg
TYPICAL APPLICATION
High Effi ciency Regulator with Switching Preregulator
–
+
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*
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
(
)