Datasheet
Schematic
4-2
4.1 Schematic
The schematic for the TPS54x80EVM-228 is shown in Figure 4-1.
Figure 4-1. TPS54x80EVM-228 Schematic
Sync Circuit
(Optional)
PHASE
C1
100 pF
R1
301 Ω
ON
S1
OFF
D1
MBR0520
R4
51.1 Ω
FMMT2907
kΩ1
R5
Q1
4.5 to 6 V Bus
TP5
C3
0.047 µ F
R7
kΩ10
TP2
TP3
2
1
J1
VIN
GND
TP4
TP1
JP1
Jumper JP2 Not Used For
Tracking Option
JP2
1
1.8 V First
3.3 V First
R3 kΩ10
R2 kΩ6.04
C2
1000 pF
R6
kΩ9.76
1
2
2
1
TPS54680PWP or TPS54880PWP
TPS54610PWP or TPS54810PWP
R8
kΩ90.9
C7
1 µ F
C4
10 µ F
C8
10 µ F
R9
kΩ71.5
C6
1 µ F
C5
10 µ F
C9
10 µ F
15
16
17
18
19
20
21
22
23
24
25
26
27
28
RT
SYNC
SS/ENA
VBIAS
VIN
VIN
VIN
VIN
VIN
PGND
PGND
PGND
PGND
PGND
PwrPad
AGND
14
13
12
11
10
9
8
7
6
5
4
3
2
1
VSENSE
COMP
PWRGD
BOOT
PH
PH
PH
PH
PH
PH
PH
PH
PH
U1
15
16
17
18
19
20
21
22
23
24
25
26
27
28
RT
ENA
VBIAS
TRACKIN
VIN
VIN
VIN
VIN
VIN
PGND
PGND
PGND
PGND
PGND
PwrPad
AGND
VSENSE
COMP
PWRGD
BOOT
PH
PH
PH
PH
PH
PH
PH
PH
PH
U2
R12
kΩ10
TP8
C14
470 pF
C10
0.047µ FL1
0.65µH
L2
0.65µH
C12
0.047µ F
R10
22 Ω
TP6
C11
3300 pF
PHASE
R11
22 Ω
TP7
C13
3300 pF
14
13
12
11
10
9
8
7
6
5
4
3
2
1
R14
kΩ10
C15
12 pF
C19
22µ F
C21
22µ F
C23
22µ F
R18
kΩ10
R16
301 Ω
R19
kΩ3.74
TP12
3.3 V
J2
1
2
VOUT
GND
TP13
TP10
1.8 V
J3
1
2
VOUT
GND
TP14
TP1
TP15
R13
kΩ10
TP9
C15
R15
470 pF
470 pF
C24
kΩ10
C17
12 pF
R21
kΩ10
R17
301 Ω
C25
470 pF
R20
kΩ9.76
C18
22µ F
C20
22µ F
C22
22µ F
Analog and Power Grounds are Tiied at The PowerPAD Under The IC Package