Datasheet

LTC3728L/LTC3728LX
34
3728lxff
Typical applicaTions
Figure 13. LTC3728L/LTC3728LX 5V/4A, 3.3V/5A Regulator with External Frequency Synchronization
0.1µF
4.7µF, 10V
+
22µF
50V
M1
PIN 4
PIN 4
Q1 Q2
Q3 Q4
M2
1µF
0.1µF
10Ω
0.008Ω
0.008Ω
1µF 50V
f
SYNC
3.3V
0.1µF
10k
105k
1%
100pF
8.06k
100pF
4.75k
1000pF
1500pF
0.01µF
1000pF
1000pF
1000pF
0.1µF
20k
1%
63.4k
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
LTC3728L/LTC3728LX
L1
4.3µH
L2
4.3µH
150µF, 6.3V
180µF, 4V
GND
V
OUT2
3.3V/5A
V
OUT1
5V/4A
V
IN
7V TO
28V
3728 F13
+ +
V
IN
: 7V TO 28V
V
OUT
: 5V, 4A/3.3V, 5A
SWITCHING FREQUENCY = 250kHz TO 550kHz
M1, M2: FDS6982S OR VISHAY Si4810DY
L1, L2: SUMIDA CDEP105-4R3MC-88
OUTPUT CAPACITORS: PANASONIC SP SERIES
180pF
180pF
0.1µF
CMDSH-3TR
CMDSH-3TR
PGOOD
V
PULL-UP
(<7V)
1µF 50V