Datasheet

12
LT3436
3436fa
V
IN
(V)
0
MAXIMUM LOAD CURRENT (A)
161412 18
3436 TA02c
48
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
2 6 10 20
LOAD CURRENT (mA)
EFFICIENCY (%)
0 1.5k1.0k
3436 TA02d
500
100
90
80
70
60
50
40
30
20
10
0
2.0k
3.3V
IN
5V
IN
12V
IN
LT3436
V
IN
FB
V
C
SYNC GND
LT3436 • TA02
V
SW
SHDN
D2
1N4148
D3
1N4148
C3
4.7µF
C1
4.7µF
C6
0.1µF
C2
10nF
C4
470pF
R3
4.7k
R1
90.9k
R2
10k
1%
R4
1M
V
OUT
12V
0.8A
C7
22µF
C5
0.1µF
OFF ON
V
IN
5V
D1
B220A
L1
3.9µH
Q1
Si2306DS
Load Disconnects in Shutdown
TYPICAL APPLICATIO S
U
3V to 20V
IN
5V
OUT
SEPIC with Either Two Inductors or a Transformer
V
IN
FB
V
C
SYNC
GNDGND
3436 TA02b
SW
SHDN
C1
OPT
C3
10nF
C4
470pF
R3
2.2k
R1
31.6K
1%
R2
10K
1%
V
OUT
5V
GNDGND
C6
OPT
C5
OPT
V
IN
3V TO 20V
D1
B220A
L1
CDRH6D28-100
C1
4.7µF
X5R
25V
CERAMIC
C2
22µF
X5R
10V
CERAMIC
C7
1µF, X5R, 25V
CERAMIC
L2
CDRH6D28-100
+
LT3436
SYNC
SHDN
OPTION: REPLACE L1, L2 WITH TRANSFORMER CTX5-1A, CTX8-1A, CTX10-2A
Maximum Load Current
Increases with Input Voltage Efficiency