LTC3728 Linear Technology, LTC3728 Datasheet - Page 29

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

TYPICAL APPLICATIO S
V
V
SWITCHING FREQUENCY = 250kHz
MI, M2, M3, M4: NDS8410A
L1: SUMIDA CEP123-6R3MC
T1: 10µH 1:1.8 — DALE LPE6562-A262 GAPPED E-CORE OR BH ELECTRONICS #501-0657 GAPPED TOROID
IN
OUT
180pF
180pF
0.1µF
: 7V TO 28V
33pF
33pF
20k
15k
15k
20k
1%
1%
: 5V, 3A/3.3V, 5A/12V, 120mA
59k
0.1µF
1000pF
1000pF
105k, 1%
63.4k
1%
1000pF
1000pF
3.3V
Figure 12. LTC3728 High Efficiency Low Noise 5V/3A, 3.3V/5A, 12V/120mA Regulator
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
U
+
–
–
+
RUN/SS2
BOOST1
BOOST2
EXTV
PGOOD
INTV
PGND
SW1
SW2
BG1
BG2
TG1
TG2
V
CC
CC
IN
28
27
26
25
24
23
22
21
20
19
18
17
16
15
100k
1µF
10V
CMDSH-3TR
V
(<7V)
0.1µF
PGOOD
PULL-UP
CMDSH-3TR
0.1µF
4.7µF
1M
0.1µF
10Ω
M1
M3
MBRS1100T3
T1, 1:1.8
6.3µH
10µH
M2
22µF
M4
50V
L1
PANASONIC SP
PANASONIC SP
150µF, 6.3V
180µF, 4V
0.01Ω
0.015Ω
D1
MBRM
140T3
D2
MBRM
140T3
3728 F12
33µF
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25V
3
+
V
7V TO
28V
V
3.3V
5A; 6A PEAK
IN
OUT2
LT1121
2
100k
LTC3728
220k
8
+
1
5
GND
1µF
25V
V
5V
3A; 4A PEAK
ON/OFF
V
12V
120mA
29
OUT1
OUT3
3728fb