Datasheet

LT1963A Series
21
1963aff
For more information www.linear.com/LT1963A
Typical applicaTions
10VAC AT
115V
IN
10VAC AT
115V
IN
–
+
–
+
–
+
750Ω
+V
+V
+V
+V
+V
1/2
LT1018
1/2
LT1018
LT1006
10k
10k
10k
200k
0.1µF
22µF
1µF
0.033µF
1N4148
1N4148
LT1004
1.2V
750Ω
A1
C1A
C1B
34k*
12.1k*
3.3V
OUT
1.5A
L1
500µH
10000µF
TO ALL “+V”
POINTS
22µF
1N4002
1N4002 1N4002
1N4148
“SYNC”
1k
L2
90-140
VAC
1963A TA03
LT1963A-3.3
IN
SHDN
OUT
FB
GND
2.4k
+
+
+
L1 = COILTRONICS CTX500-2-52
L2 = STANCOR P-8559
* = 1% FILM RESISTOR
= NTE5437
SCR Pre-Regulator Provides Efficiency Over Line Variations
LT1963A-3.3
GND
LT1963A
IN
SHDN
OUT
FB
IN
SHDN
OUT
FB
GND
+
+
R1, 0.01Ω
R2
0.01Ω
R3
2.2k
R4
2.2k
R5
1k
R6
6.65k
R7
4.12k
C1
100µF
C3
0.01µF
C2
22µF
V
IN
> 3.7V
SHDN
3.3V
3A
8
4
3
2
1
–
+
1/2
LT1366
1963A TA05
Paralleling of Regulators for Higher Output Current