Datasheet

18
LT1533
A 10W Low Noise 5V to 12V Converter. Q1-Q2 Provide 5A Output Capacity
While Preserving LT1533’s Voltage Current Slew Control. Efficiency Is 68%.
Higher Input Voltages Minimize Follower Loss, Boosting Efficiency Above 71%.
See AN70 for Details
TYPICAL APPLICATIONS
U
SHDN
DUTY
SYNC

COL A
COL B
PGND
R
VSL

R
CSL

FB
NFB
LT1533
GND
V
IN
5V
14
2
15
16
13
12
7
11
3
4
5
6
10

1500pF
18k
0.01µF
10k
2.49k
1%
L2
FB2
FB1
4.7µF
10k
+
T1
L1
300µH
12V
5A
L3
33µH
89
21.5k
1%
+ +
100µF
100µF
1N5817
1N5817
1N4148
1N4148
1553 TA07
C
T

R
T
V
C
OPTIONAL FOR
LOWEST RIPPLE
()
330Ω
330Ω
0.05Ω
0.05Ω
4.7µF
+
Q2
Q1
0.003µF
680Ω
 L1:COILTRONICS CTX300-4
 L2:22nH TRACE INDUCTANCE, FERRITE BEAD OR
 INDUCTOR COILCRAFT B-07T TYPICAL
 L3:COILTRONICS CTX33-4
 Q1, Q2:MOTOROLA D45C1
 T1:COILTRONICS CTX02-13949-X1
FB1, FB2:FERRONICS FERRITE BEAD 21-110J