TPS54610
SLVS398D − JUNE 2001 − REVISED JULY 2003
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APPLICATION INFORMATION
Figure 10 shows the schematic diagram for a typical
TPS54610 application. The TPS54610 (U1) can provide
greater than 6 A of output current at a nominal output
voltage of 3.3 V. For proper thermal performance, the
VI
+
C2
220
µF
10 V
R2
10 kΩ
U1
TPS54610PWP
28
27
26
25
C1
0.047
µF
PWRGD
C4
0.1
µF
4
3
RT
SYNC
SS/ENA
VBIAS
PWRGD
COMP
VIN
VIN
VIN
VIN
VIN
PH
PH
PH
PH
PH
PH
PH
PH
2
PH
24
23
22
21
20
14
13
12
11
10
9
8
7
6
C7
0.047
µF
+
C9
+
470
µF
4V
C10
470
µF
4V
C11
100 pF
C8
10
µF
exposed thermal PowerPAD underneath the integrated
circuit package must be soldered to the printed-circuit
board.
L1
4.7
µH
VO
C3
120 pF
C5
5600 pF
R1
9.09 kΩ
5
VSENSE
BOOT
19
PGND
18
PGND
17
PGND
16
1
AGND
PGND
15
PGND
POWERPAD
C6
8200 pF
R4
10 kΩ
R5
1.74 kΩ
R3
3.74 kΩ
Figure 10. Application Circuit
COMPONENT SELECTION
The values for the components used in this design
example were selected using the SWIFT designer
software tool. SWIFT designer provides a complete design
environment for developing dc-dc converters using the
TPS54610.
current is carried in both C2 and C8, and the return path to
PGND must avoid the current circulating in the output
capacitors C9 and C10.
FEEDBACK CIRCUIT
The resistor divider network of R3 and R4 sets the output
voltage for the circuit at 3.3 V. R4, along with R1, R5, C3,
C5, and C6 form the loop compensation network for the
circuit. For this design, a Type 3 topology is used.
INPUT FILTER
The input to the circuit is a nominal 5 VDC. The input filter
C2 is a 220-µF POSCAP capacitor, with a maximum
allowable ripple current of 3 A. C8 provides high frequency
decoupling of the TPS54610 from the input supply and
must be located as close as possible to the device. Ripple
8
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