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POL_EN
+3V3
AGND
5
BOOT
13
COMP
7
EN
15
GND
3
PH
10
PAD
17
PWRGD
14
RT/CLK
8
SS/TR
9
VIN
1
VSENSE
6
GND
4
PH
11
PH
12
VIN
2
VIN
16
U3
TPS54678RTER
0
R124
0.1µF
C28
22µF
C34
22µF
C35
22µF
C36
22µF
C37
0.1µF
C32
82.5k
R132
10k
R126
20.0k
R128
10k
R129
2700pF
C38
DNP
C6
GND
500kHz
5V VIN
POL_VOUT
POL_Margin
POL_EN
To EN pin
PGOOD
J27
J29
J30
TP8
TP9
GND
40.2
R125
20.0k
R127
22µF
C29
22µF
C30
22µF
C31
1uH
12A
L1
1
2
3
J28
100k
R131
97.6k
R130
1000pF
C33
0.01µF
C18
UCD90240EVM-704 Schematics
Figure 23. UCD90240EVM Schematic (6 of 6)
31
SLVUAF3A – March 2015 – Revised March 2015
UCD90240EVM-704 24-Rail Sequencer Development Board
Copyright © 2015, Texas Instruments Incorporated