LTC3728 Linear Technology, LTC3728 Datasheet - Page 30

• Manufacturer Part Number: LTC3728
• Description: 2-Phase Synchronous Step-Down Switching Regulator
• Manufacturer: Linear Technology

LTC3728
TYPICAL APPLICATIO S
30
V
V
IN
OUT
0.1µF
: 5.2V TO 28V
27pF
27pF
33pF
33pF
20k
10k
15k
15k
20k
1%
1%
: 5V, 4A/3.3V, 4A
0.01µF
0.1µF
220pF
220pF
63.4k
105k
1%
1%
1000pF
Figure 13. LTC3728 5V/4A, 3.3V/4A Regulator with External Frequency Synchronization
1000pF
1000pF
SWITCHING FREQUENCY = 250kHz TO 550kHz
MI, M2: FDS6982S
3.3V
f
SYNC
10
11
12
13
14
1
2
3
4
5
6
7
8
9
RUN/SS1
SENSE1
SENSE1
V
PLLFLTR
PLLIN
FCB
I
SGND
3.3V
I
V
SENSE2
SENSE2
U
TH1
TH2
OSENSE1
OSENSE2
OUT
LTC3728
+
–
–
+
RUN/SS2
BOOST1
BOOST2
EXTV
PGOOD
INTV
PGND
SW1
SW2
TG1
BG1
BG2
TG2
V
CC
CC
IN
28
27
26
25
24
23
22
21
20
19
18
17
16
15
L1, L2: 8µH SUMIDA CEP1238R0MC
OUTPUT CAPACITORS: PANASONIC SP SERIES
1µF
10V
CMDSH-3TR
0.1µF
V
(<7V)
PGOOD
PULL-UP
CMDSH-3TR
0.1µF
4.7µF
0.1µF
10Ω
M2
M1
8µH
22µF
8µH
50V
L1
L2
0.015Ω
0.015Ω
56µF, 4V
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47µF
6.3V
3728 F13
V
5V
3A; 4A PEAK
GND
V
5.2V TO
28V
V
3.3V
3A; 4A PEAK
OUT1
IN
OUT2
3728fb