Datasheet

LTC3727A-1
29
3727a1fa
TYPICAL APPLICATIONS
Figure 12. LTC3727A-1 12V/4A, 5V/5A Regulator with External Frequency Synchronization
0.1μF
4.7μF
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
+
22μF
50V
D1
MBRM
140T3
D2
MBRM
140T3
M1A M1B
M2A M2B
1μF
10V
0.1μF
10Ω
0.015Ω
0.015Ω
f
SYNC
3.3V
0.1μF
10k
105k
1%
33pF
15k
33pF
15k
220pF
220pF
0.01μF
1000pF
1000pF
1000pF
0.1μF
20k
1%
280k
1%
20k
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
LTC3727A-1
L1
8μH
L2
15μH
C
OUT1
47μF
6.3V
C
OUT2
100mF 16V
GND
V
OUT2
12V
4A; 5A PEAK
V
OUT1
5V
5A; 6A PEAK
V
IN
15V TO
28V
3727 F13
+ +
V
IN
: 15V TO 28V
V
OUT
: 5V, 5A/12V, 4A
SWITCHING FREQUENCY = 250kHz
MI, M2: FAIRCHILD FDS6680A
L1: 8μH SUMIDA CDEP134-8R0
L2: 15μH COILTRONICS UP4B-150
27pF
27pF
0.1μF
CMDSH-3
CMDSH-3
PGOOD
V
PULL-UP
(<7V)
C
OUT1
: PANASONIC EEFCDOJ470R
C
OUT2
: SANYO OS-CON 16SVP100M