LTC3731HG Linear Technology, LTC3731HG Datasheet - Page 28

• Manufacturer Part Number: LTC3731HG
• Description: IC REG SW SYNC 3PH STPDWN 36SSOP
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3731HG

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.6 ~ 6 V
• Frequency - Switching: 225kHz ~ 680kHz
• Voltage - Input: 4 ~ 36 V
• Operating Temperature: -40°C ~ 140°C
• Mounting Type: Surface Mount
• Package / Case: 36-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output: -
• Power - Output: -
• Lead Free Status / Rohs Status: Not Compliant

LTC3731H
TYPICAL APPLICATIO S
28
OPTIONAL FILTER FOR
SYNCHRONIZATION
V
V
SWITCHING FREQUENCY: 300kHz
1000pF
100pF
330pF
IN
OUT
10k
2.2k
: 3.3V TO 20V
: 1.5V AT 65A
6.04k
0.01µF
0.01µF
3.3nF
9.09k
S1
S1
S2
S2
S3
S3
V
IN
+
–
+
–
–
+
1000pF
1000pF
1000pF
SYNC IN
300kHz
300pF
18k
V
CC
1µF
I
TH
12k
10
11
12
13
14
15
16
17
18
C
C
D1 TO D3: DIODES INC. B340A
1
2
3
4
5
6
7
8
9
IN
OUT
: SANYO OS-CON 25SP68M
V
PLLIN
PLLFLTR
FCB
NC
NC
NC
EAIN
SGND
SENSE1
SENSE1
SENSE2
SENSE2
SENSE3
SENSE3
RUN/SS
I
UVADJ
: 270µF/2V ×8 PANASONIC SP EEUE0D271R
TH
U
CC
OR 470µF/2.5V ×6 SANYO POSCAP 2R5 TPD470M
LTC3731H
+
–
+
–
–
+
PHASMD
BOOST1
BOOST2
BOOST3
PGOOD
10Ω
PGND
SGND
SW1
SW2
SW3
Figure 14. 3-Phase 65A Power Supply
CLK
TG1
TG2
BG1
BG2
BG3
TG3
V
DR
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
NC
3731H F14
1µF
0.1µF
V
CC
0.1µF
0.1µF
V
CC
10µF
V
1Ω
CC
PGOOD
47k
L1 TO L3: 0.8µH SUMIDA CEP125-0R8
M1, M3, M5: IRF7821W ×2, Si7860DP
M2, M4, M6: IRF7832 ×2, Si7892DP ×2
M1
M2
M3
M4
M5
M6
V
5V TO 7V
V
V
V
CC
IN
IN
IN
D1
D2
D3
OR HAT2168 ×2
OR HAT2165 ×2
L1
L2
L3
S1
S2
S3
+
+
+
0.002Ω
0.002Ω
0.002Ω
S1
S2
S3
–
–
–
1.5V AT 65A
10µF
6.3V
×3
10µF
25V
×5
V
OUT
+
+
C
C
68µF
25V
IN
OUT
V
3.3V TO 20V
IN
3731hfa