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 applicaTions

OPTIONAL FILTER FOR
SYNCHRONIZATION
V
V
SWITCHING FREQUENCY: 300kHz
1000pF
100pF
330pF
IN
OUT
2.2k
10k
: 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
CC
OR 470µF/2.5V 6 SANYO POSCAP 2R5 TPD470M
LTC3731HG
+
–
+
–
–
+
PHASMD
BOOST1
BOOST2
BOOST3
PGOOD
10
PGND
SGND
Figure 14. 3-Phase 65A Power Supply
SW1
SW2
SW3
BG1
BG2
BG3
CLK
TG1
TG2
V
TG3
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
V5
0.1µF
0.1µF
V5
10µF
V5
1
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
V5
5V TO 7V
V
V
V
IN
IN
IN
D1
D2
D3
OR HAT2168 2
OR HAT2165 2
L1
L2
L3
S1
S2
S3
+
+
+
0.002
0.002
0.002
S1
S2
S3
–
–
–
1.5V AT 65A
10µF
6.3V
10µF
25V
3
5
V
OUT
+
+
C
C
68µF
25V
OUT
IN
V
3.3V TO 20V
IN
3731Hfb