Datasheet

LTC3728
32
3728fg
TYPICAL APPLICATIONS
Figure 12. LTC3728 High Effi ciency Low Noise 5V/3A, 3.3V/5A, 12V/120mA Regulator
0.1MF
0.1MF
4.7MF
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
+
22MF
50V
D1
MBRM
140T3
MBRS1100T3
D2
MBRM
140T3
M1 M2
M3 M4
1MF
10V
CMDSH-3TR
CMDSH-3TR
0.1MF
107
0.017
0.0157
3.3V
0.1MF
20k
1%
105k, 1%
33pF
15k
33pF
15k
1000pF
1000pF
1000pF
1000pF
0.1MF
20k
1%
63.4k
1%
RUN/SS1
SENSE1
+
SENSE1
–
V
OSENSE1
PLLFLTR
PLLIN
FCB
I
TH1
SGND
3.3V
OUT
I
TH2
V
OSENSE2
SENSE2
–
SENSE2
+
PGOOD
TG1
SW1
BOOST1
V
IN
BG1
EXTV
CC
INTV
CC
PGND
BG2
BOOST2
SW2
TG2
RUN/SS2
LTC3728
T1, 1:1.8
10MH
L1
6.3MH
150MF, 6.3V
PANASONIC SP
1MF
25V
180MF, 4V
PANASONIC SP
GND
ON/OFF
8
5
123
V
OUT2
3.3V
5A; 6A PEAK
V
OUT3
12V
120mA
33MF
25V
V
OUT1
5V
3A; 4A PEAK
V
IN
7V TO
28V
3728 F12
+ +
V
IN
: 7V TO 28V
V
OUT
: 5V, 3A/3.3V, 5A/12V, 120mA
SWITCHING FREQUENCY = 250kHz
MI, M2, M3, M4: NDS8410A
L1: SUMIDA CEP123-6R3MC
T1: 10MH 1:1.8 — DALE LPE6562-A262 GAPPED E-CORE OR BH ELECTRONICS #501-0657 GAPPED TOROID
LT1121
+
+
220k
100k
1M
PGOOD
100k
V
PULL-UP
(<7V)
59k
180pF
180pF