Datasheet

LT3581
30
3581fa
For more information www.linear.com/LT3581
Typical applicaTions
2MHz, 12V SEPIC Converter Can Accept Input Voltages from 9V to 16V
V
IN
9V TO 16V
100k
130k
43.2k
C1
3.3µF
2.2nF
3581 TA06a
0.1µF
C3
10µF
10k
V
OUT
12V
1A (V
IN
= 9V)
1.1A (V
IN
= 12V)
1.3A (V
IN
= 16V)
C2
2.2µF
SW1 SW2
FB
CLKOUT
GATE
V
C
SS
V
IN
RT
GND
SYNC
FAULT
SHDN
LT3581
100pF
C1: 3.3µF, 25V, X7R, 1206
C2: 2.2µF, 50V, X7R, 1206
C3: 10µF, 25V, X7R, 1210
D1: CENTRAL SEMI CTLSH2-40M832
L1, L2: COILCRAFT MSD7342-332MLB
L2
3.3µH
L1
3.3µH
•
•
D1
Efficiency Line Regulation with No Load
Load Regulation at V
IN
= 12
LOAD CURRENT (mA)
0
50
EFFICIENCY (%)
55
65
70
75
1200
100
95
3581 TA06b
60
300
1500
900600
80
85
90
V
IN
= 16V
V
IN
= 9V
V
IN
= 12V
V
IN
(V)
8
11.990
V
OUT
(V)
11.998
11.996
11.994
11.992
12.000
9 12 141310 1511 16
17
3581 TA06c
LINE REGULATION ~0.0044%/V
I
LOAD
(mA)
0
11.96
V
OUT
(V)
12.00
11.99
11.98
11.97
12.01
400 800600 1000200 1200
1400
3581 TA06d
LOAD REGULATION ~0.25%/A