Datasheet

19
LTC3832/LTC3832-1
sn3832 3832fs
Efficiency vs Load Current
Figure 12. Typical 3.3V to 2.5V, 14A Application
+
G1
I
MAX
I
FB
G2
PGND
GND
SENSE
+
FB
V
CC
SS
FREQSET
SHDN
COMP
PV
CC2
1N5817
OPTIONAL
1N5817
1N5817
5.6k
1k
0.1µF
0.1µF
L
O
1.3µH
Q2
NC
C
IN
: SANYO 6TPB330M
C
OUT
: SANYO 4TPB470M
D1: MBRS330T3
L
O
: SUMIDA CDEP105-1R3-MC-S
Q1A, Q1B, Q2: FAIRCHILD FDS6670A
D1
C
OUT
470µF
×3
V
OUT
2.5V
14A
V
IN
3.3V
3832 F12a
Q1A, Q1B
2 IN PARALLEL
0.1µF
LTC3832
10µF
SHDN
NC
+
4.7µF
D
Z
12V
1N5242
PV
CC1
SENSE
–
+
C
IN
330µF
×2
+
1µF
C1
180pF
0.01µF
100Ω
C
C
1500pF
R
C
18k
LOAD CURRENT (A)
0
EFFICIENCY (%)
60
80
100
10 11
3832 F12b
40
20
50
70
90
30
10
0
123
5674
89
12 13 14
15
T
A
= 25°C
V
IN
= 3.3V
V
OUT
= 2.5V
REFER TO FIGURE 12
APPLICATIO S I FOR ATIO
WUUU