Datasheet

LTC3828
30
3828fc
APPLICATIONS INFORMATION
TRCKSS1
I
TH1
SENSE1
+
SENSE1
–
V
OSENSE1
PLLFLTR
RUN1
FCB/PLLIN
SGND
TRCKSS2
SENSE2
–
SENSE2
+
I
TH2
V
OSENSE2
CLKOUT
PGOOD
BOOST1
TG1
SW1
V
IN
INTV
CC
PGND
BG1
BG2
SW2
TG2
BOOST2
RUN2
LTC3828EG
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
f
IN
C
B1
0.22µF
C
B2
0.22µF
C
INTVCC
4.7µF
C
VIN
0.1µF
C
IN
22µF 16V
R
IN
10
PGOOD
R
PU
V
PULL_UP
<5.5V
R
SENSE1
6m
L1
0.68µH
R
SENSE2
6m
L2
1µH
M1 M2
M3 M4
C
OUT2
220µF 4V
C
OUT1
330µF 2.5V
V
OUT2
3.3V
7A
V
OUT1
1.5V
7A
V
IN
12V
D1
D2
R1
20k 1%
R2
17.4k 1%
R3
20k 1%
R4
63.4k 1%
3828 F15
33pF
33pF
180pF
500kHz
180pF
1000pF
1000pF
0.1µF
0.1µF
1000pF
15k
10k
4.7k
26.1k30k
1µF
1µF
CERAMIC
1µF
CERAMIC
2nF
10
10
2nF
10
10
++
Figure 15. LTC3828 High Effi ciency Low Noise 1.5V/7A,
3.3V/7A, 500kHz Regualtor with Ratiometric Tracking