ltc3728legn-trpbf Linear Technology Corporation, ltc3728legn-trpbf Datasheet - Page 33

• Manufacturer Part Number: ltc3728legn-trpbf
• Description: Dual, 550khz, 2-phase Synchronous Step-down Switching Regulator
• Manufacturer: Linear Technology Corporation

TYPICAL APPLICATIONS
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
1000pF
1000pF
Figure 13. LTC3728 5V/4A, 3.3V/4A Regulator with External Frequency Synchronization
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
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
47μF
6.3V
LTC3728
3728 F13
V
5V
3A; 4A PEAK
GND
V
5.2V TO
28V
V
3.3V
3A; 4A PEAK
OUT1
IN
OUT2
33
3728fd