Datasheet

LT3724
22
3724fd
4.5V to 20V Input to 12V at 25W Output SEPIC Converter with 60V Input Transient Capability
Efficiency and Power Loss
vs Load Current
4
RB
49.9k
RA
100k
R5
40.2k
R
SENSE
0.010Ω
R2
130k
R1
14.7k
SHDN
C
SS
R3
200k
BURST_EN
V
FB
V
C
SGND
TG
SW
V
CC
PGND
SENSE
+
SENSE
–
1
3
5
6
7
8
16
15
14
12
11
10
9
C3
680pF
C2
120pF
R4
47k
C7
0.1µF
C1
390pF
C
IN2
25V
1µF
C
IN1
22µF
2x
25V
V
IN
4.5V TO 20V
TO 60V
TRANSIENT
D1A
GSD2004
D3
D1N4148
L1
20µH
L1
20µH
D1B
GSD2004
D2
V
OUT
12V AT 25W
C
OUT2
22µF
M1
3724 TA07a
V
IN
BOOST
LT3724
C4
1µF
25V
C
OUT1
330µF
25V
16V
C6
56pF
R7
10Ω
R6
10Ω
C5
22µF
3x
25V
•
•
C5, C
IN1
, C
OUT2
= TDKC453X7R1E226M
C
OUT1
= SANYO, OS-CON 16SVP330M
D2 = ON SEMI, MBRD660
L1 = COILCRAFT VERSAPAC VP5-D83
M1 = VISHAY, Si7852DP
LOAD CURRENT (A)
0.1
EFFICIENCY (%)
POWER LOSS (W)
92
91
90
89
88
87
86
85
3.5
3.0
2.5
2.0
1.5
1.0
0
0.5
1 10
3724 TA07b
V
IN
= 20V
V
IN
= 10V
V
IN
= 15V
LOSS
V
IN
= 15V
TYPICAL APPLICATIONS