LTC1629-PG_15 Datasheet, PDF (26/28 Pages) Linear Technology – PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulators

LTC1629/LTC1629-PG
TYPICAL APPLICATIO S
OPTIONAL
SYNC
CLOCK IN
0.33µF
8.06k, 1%
0.33µF
47k
1000pF
100pF
6800pF
25.5k, 1%
470pF
1
28
2
RUN/SS
SENSE1⁺
CLKOUT ₂₇
TG1
3
4
SENSE1^–
26
SW1 ₂₅
5 ^EAIN
BOOST1 ₂₄
6
7
8
PLLFLTR
V_IN
PLLIN ^LTC1629 BG1
PHASMD
EXTV_CC
23
22 _5V
21
9 ^ITH
INTV_{CC 20}
SGND
PGND
10
19
11
12
13
14
V_DIFFOUT
V_OS–
V_OS+
SENSE2^–
SENSE2⁺
BG2 ₁₈
BOOST2 ₁₇
SW2 ₁₆
TG2 ₁₅
AMPMD
1000pF
24k
75k
47pF
10k
0.01µF ^1nF
1000pF ¹
2
3
4
5
6
7
8
100pF 9
NC ¹⁰
11
12
13
14
RUN/SS
SENSE1⁺
SENSE1^–
CLKOUT
TG1
SW1
EAIN
BOOST1
PLLFLTR
V_IN
PLLIN ^LTC1629 BG1
PHASMD
I_TH
SGND
EXTV_CC
INTV_CC
PGND
V_DIFFOUT
V_OS–
V_OS+
SENSE2^–
SENSE2⁺
BG2
BOOST2
SW2
TG2
AMPMD
28
27
26
25
24
23
22
5V
21
20
19
18
17
16
15
1000pF
0.47µF
D7
1µF,25V
D8
0.47µF
0.47µF
D9
1µF,25V
D10
0.47µF
M1
10Ω
1µF
22µF
6.3V
M5
L1
0.003Ω
M2
M3
M4
2X150µF GND
16V
M6
M7
M8
L2
0.003Ω
D1
MBRS
340T3
D2
MBRS
340T3
3X470µF, 6.3V
KEMET CAP
V_OUT1
3.3V/90A
L3
0.003Ω
M9
10Ω
M10
M11
M12
D3
MBRS
340T3
1µF
3X470µF, 6.3V
22µF
6.3V
2X150µF GND
16V
KEMET CAP
V_IN
12V
D4
MBRS
340T3
M13
M14
M15
M16
L4
0.003Ω
47pF
10k
0.01µF ^1nF
1000pF ¹
2
3
4
5
6
7
8
100pF 9
10
NC
11
12
13
14
RUN/SS
SENSE1⁺
SENSE1^–
CLKOUT
TG1
SW1
EAIN
BOOST1
PLLFLTR
V_IN
PLLIN ^LTC1629 BG1
PHASMD
I_TH
SGND
EXTV_CC
INTV_CC
PGND
V_DIFFOUT
V_OS–
V_OS+
SENSE2^–
SENSE2⁺
BG2
BOOST2
SW2
TG2
AMPMD
28
27
26
25
24
23
22
5V
21
20
19
18
17
16
15
1000pF
0.47µF
D11
1µF,25V
M17
10Ω
1µF
22µF
6.3V
D12
0.47µF
M21
L5
0.003Ω
M18
M19
2X150µF GND
16V
M20
D5
MBRS
340T3
3X470µF, 6.3V
KEMET CAP
M22
M23
M24
L6
0.003Ω
D6
MBRS
340T3
V_IN: 12V
V_OUT: 3.3V/90A
SWITCHING FREQUENCY = 220kHz
MI – M24: FDS6680A
L1 – L6: 1µH PANASONIC ETQP6F1R0S
D7 – D12: CENTROL CMDSH-3TR
OUTPUT CAPACITORS: KEMET T510X477M006AS
Figure 11. High Current 3.3V/90A 6-Phase Application
1629 TA03
26