24
LTC1624
TYPICAL APPLICATIO
N
S
U
+
+
SENSE
–
I
TH
/RUN
V
FB
GND
V
IN
BOOST
TG
SW
LTC1624
1000pF
100pF
C
C
330pF
R
C
6.8k
D1
MBRS130LT3
D2
CMDSH-3
C
B
0.1
µ
F
8
7
6
5
1
2
3
4
+
R2
35.7k
1%
R1
11k
1%
C
OUT
100
µ
F
16V
×
2
M1
Si6426DQ
L1b*
L1a*
R
SENSE
0.05
Ω
C
IN
22
µ
F
35V
×
2
22
µ
F
35V
V
OUT
5V
1A
V
OUT
V
IN
3.6V TO 18V
1624 F17
* COILTRONICS CTX20-4
0.1
µ
F
Figure 17. 5V/1A SEPIC Converter with Output Derived Boost Voltage
Figure 18. 24V to 12V/10A Buck Converter with Output-Derived Boost Voltage
+
SENSE
–
I
TH
/RUN
V
FB
GND
V
IN
BOOST
TG
SW
LTC1624
C
IN1
, C
IN2
1000
µ
F
35V
×
2
V
IN
13V TO
28V
D1*
C
B
0.1
µ
F
C5
3.3
µ
F
50V
C4, 0.1
µ
F
8
7
6
5
1
2
3
4
R
SENSE2
, 0.015
Ω
R1
11k
1%
R
C
20k
C
C
100pF
M1*
C
OUT
2700
µ
F
16V
R5
220
Ω
R2
100k
1%
Z1
IN 755
L1
V
OUT
12V
10A
1624 F18
C
IN1
, C
IN2
= SANYO 35MV1000GX
C5, C7 = WIMA MKS2
C
OUT
= SANYO 16MV2700GX
D1 = MOTOROLA MBR2535CT
L1 = PULSE ENGINEERING PO472
M1 = INTERNATIONAL RECTIFIER IRL3803
R
SENSE1
, R
SENSE2
= IRC LR2010-01-R015-F
* BOTH D1 AND M1 MOUNTED TO SAME
THERMALLOY #6399B HEAT SINK
R
SENSE1
, 0.015
Ω
+
C7
3.3
µ
F
50V
C9
0.1
µ
F
C10
220pF
D2
MBR0540
