LTC3731 Datasheet, PDF (29/32 Pages) Linear Technology – 3-Phase, 600kHz, Synchronous Buck Switching Regulator Controller

TYPICAL APPLICATIO
Figure 15. 2.5V/100A Power Supply
LTC3731
SYNC IN
V_CC
1k _68pF
8.2k
V_CC ¹
2
3
3.3k
4
V_OUTS+
5
V_OUTS–
220pF
6
4.7k
15k
7
330pF
DIFFOUT
8
EAIN
9
S1^{+ 10Ω×6}
10
S1^–
1000pF
11
S2⁺
12
S2^–
1000pF
13
S3^–
14
0.1µF S3⁺
1000pF
15
16
RUN/SS
17
357k
18
V_IN
121k
270pF
I_TH
1.2k
2700pF
100pF 1000pF
1000pF
UVADJ
1
V_CC
0.01µF
10k
CLK1 ²
3
4
1000pF
V_OUTS+
5
V_OUTS–
6
7
DIFFOUT
8
EAIN 10pF
9
S4^{+ 10Ω×6}
10
S4^–
1000pF
11
S5⁺
12
S5^–
1000pF
13
S6^–
100pF S6⁺
14
1000pF
15
16
RUN/SS
17
18
UVADJ
V_CC
+
1µF ^10Ω
V_CC
PLLIN
CLKOUT
PGOOD
PLLFLTR BOOST1
FCB
TG1
IN⁺
SW1
LTC3731
IN^–
BOOST2
DIFFOUT
TG2
EAIN
SW2
SGND
SENSE1⁺
SENSE1^–
SENSE2⁺
SENSE2^–
SENSE3^–
SENSE3⁺
V_DR
BG1
PGND
BG2
BG3
SW3
TG3
RUN/SS BOOST3
I_TH
PHASMD
UVADJ SGND2
36 _CLK1
35
34
33
32
PGOOD
BOOST1
BOOST3
10k
BOOST2
10µF
Cer.
0.1µF ^1Ω
V_IN
M1
L1 _0.002Ω
31
30
0.1µF
29
28
27
1µF ⁺
26
Cer.
4.7µF
25
24
23
22
21
0.1µF
20
V_CC
19
X2
M2,3
M4
X2
M5,6
D1
S1⁺
S1^–
V_IN
L2
0.002Ω
D2
S2⁺
S2^–
M7
X2
M8,9
V_IN
L3
0.002Ω
D3
S3⁺
S3^–
10µF
10V
V_CC
PLLIN
CLKOUT
PGOOD
PLLFLTR BOOST4
FCB
TG4
IN⁺
SW4
LTC3731
IN^–
BOOST5
DIFFOUT
TG5
EAIN
SW5
SGND
SENSE4⁺
SENSE4^–
SENSE5⁺
SENSE5^–
SENSE6^–
SENSE6⁺
V_DR
BG4
PGND
BG5
BG6
SW6
TG6
RUN/SS BOOST6
I_TH
PHASMD
UVADJ SGND2
36 _CLKOUT ^PGOOD
35
34
33
0.1µF ^10Ω
32
31
30
0.1µF
29
28
27
1µF ⁺
26
Cer.
4.7µF
25
24
23
22
21
0.1µF
20
19
V5
BOOST4
BOOST6
BOOST5
V_IN
M10
L4
0.002Ω
X2
M11,12
D4
S4⁺
S4^–
V_IN
M13
L5 _0.002Ω
X2
M14,15
D5
S5⁺
S5^–
V_IN
M16
L6 _0.002Ω
X2
M17,18
D6
S6⁺
S6^–
V5
V_OUT
+
C_OUT
+
V_IN
C_IN
NOTES:
V5: 5V TO 7V
V_IN: 10V TO 14V; V_OUT: 2.5V/100A
SWITCHING FREQUENCY: 500kHz (V5 = 5V)
M1, M4, M7, M10, M13, M16:
SILICONIX Si7390DP OR HAT2168
M2, M3, M5, M6, M8, M9, M11, M12, M14, M15,
M17, M18: SILICONIX Si7356DP OR HAT2165
D1 TO D6: B320A
L1 TO L6: TOKO FDH1040: 0.56µH
C_IN: 10µF/16V CERAMIC × 10 + 270µF/16V SANYO Os-Con
C_OUT: 100µF/6.3V/X5R × 10 + 330µF/4V × 8
3731 F15
3731fa
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