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M1A
HEATSINK MOUNT TP17
TP2
P3V3_STBY
TP1
C3v3
10uF
2.5V and 1.8V / 20A, 350KHz DESIGN
UNLESS OTHERWISE SPECIFIED:
Capacitors are 0603, 10% max, 16V min, X5R min
Resistors are 0603, 1%, 100mW
10K
Q11A
IRF6622 SQ
6 +12V1 GND1 2
8 +12V3 GND3 4
D1A1
BAT54WS
A_SOD323_B
2 1
D2A1
BAT54WS
A_SOD323_B
1 2
C9A1
0.22uF
C2A
10uF
C34A
0.1uF
C6A
10uF
P2V5 P3V3_STBY
R16A1
R16A3
EMPTY R16A5
0
C14A1 R16A2
R16A4 1uF 1.4K
EMPTY
TP35
R16A
10
C14A
1uF
C8A1 C8A
0.47uF,25V 0.47uF,25V
C7A
1uF
C10A
1uF
Vout3
PGood2
Vref
D1A
BAT54WS
A_SOD323_B
2 1
D2A
BAT54WS
A_SOD323_B
1 2
TP32
C9A F
0.22u
C3A
10uF
C5A
10uF
C32A
0.1uF
5
Input capacitors must
support 9.6Arms for
2.5Vo at 20 A and 1.8Vo at 20A
+ C80A + C39A
270uF 270uF
L1A
990nH
ETQP6F1R1BFA
P12VA
J1A
5 1
7 +12V2 GND2 3
+12V4 GND4
P2V5
1 R11A 26.
TB3A
1
2
3
TB4A
1
2
3
4
5
6
COA1
4 0.1uF
5
6
TP15 TP16 REMOTE SENSE
AT TERMINAL BLOCK
P1V8
TP30
2
L2A
540nH
ETQP6F0R6BFA
1
L2A1
2 1
No Stuff
C17A
open
R10A
open
5
Q21A
IRF6622 SQ
5
Q22A
IRF6629 MX
P3V3_STBY
R6A1
0
1
TP33
2
R9A3.92K
C22A 22pF
30
9
15
32
8
6
11
10
3
Vcc
Enable
Seq
Track
HDrv2
OCset2
LDrv2
PGnd2
Fb2
IR3622
MLPQ
HDrv1
OCset1
LDrv1
PGnd1
Vp2
PGood1
Rt
Vsen1
16
R4A 3.92K
18
C1 6A 22 pF
13
14
26 Vref
29
7K
22
R14A
6.49K
Q12A
IRF6629 MX
5
C11A
open
R7A
open
R15A 6.49K
1
2
L1A1
1 2
No Stuff
TP28
R15A10
TP29
P2V5
TP9 TP13
COA
0.1uF
1
2
3
1
2
3
4
5 TB1A
6
4
5 TB2A
6
Vsen2 2
Vsen2
Fb1
21
C36A C13A
C35A1 C36A1
EMPTY EMPTY
1M
SIGNAL GND JOINS GND
R18A5
11.5K
Vsen2
C30A1
open R18A6
9.1K
C24A1
1.2nF
R18A4
0.887K
R18A1
TP31 0
R18A2
11.5K
R18A3
9.1K
C35A
10uF,6.3V 10uF,6.3V 220uF
C35A2
EMPTY
C19A C13A1
220uF EMPTY
C36A2
EMPTY
C19A1
EMPTY
C24A
5.6nF
R18A
5.1K
4
Comp2
C27A TP36
180pF
0.22uF
C29A1
R24A1
R24A
1M
20
Comp1
U1A 5.1K
TP37 IR3622 MLPQ
C29A
0.22uF
AT 1 POINT
C28A
47pF
C25A
6.8nF
R19A
R21A C30A
3.01K open
C37A3 C37A2 C37A1
EMPTY EMPTY EMPTY
R17A
3.01K
C38A1
EMPTY
C26A R20A
2.2nF 0.499K
C37A
C38A
10uF,6.3V 10uF,6.3V
REMOTE SENSE
AT TERMINAL BLOCK
C15A C15A1
100uF 100uF
TP21
TP22
C15A2
EMPTY
C15A3
EMPTY
P3V3_STBY
R30A1
4.99K TP11
RT = 26.7K, Fs = 350KHz
P3V3_STBY
R30A
4.99K TP7
PGood2 PGD_P1V8
C29A2
0.22uF
PGD_P1V8
PGD_P2V5
C29A3
0.22uF
PGD_P2V5
www.irf.com
RD-0621
11
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