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SLVS632 – JANUARY 2006
APPLICATION INFORMATION (continued)
0.110
0.220
0.080
0.050
0.013 DIA 4 PL
0.118
0.040
0.098
All dimensions in inches
Figure 10. TPS5430 Land Pattern
Application Circuits
shows the schematic for a typical TPS5430 application. The TPS5430 can provide up to 3-A output
current at a nominal output voltage of 5.0 V. For proper thermal performance the exposed PowerPAD
underneath the device must be soldered down to the printed circuit board.
U1
TPS5430DDA
10.8 - 19.8 V
VIN
EN
C1
10 mF
7
5
2
3
6
VIN
BOOT
ENA
NC
NC
VSNS
GND
PwPd
9
R2
3.24 kW
8
PH
4
D1
B340A
+
C3
220 mF
R1
10 kW
1
C2
0.01 mF
L1
15
m
H
0.050
0.026
5V
VOUT
Figure 11. Application Circuit, 12-V to 5.0-V
Design Procedure
The following design procedure can be used to select component values for the TPS5430. Alternately, the
SWIFT Designer Software may be used to generate a complete design. The SWIFT Designer Software uses an
iterative design procedure and accesses a comprehensive database of components when generating a design.
This section presents a simplified discussion of the design process.
To begin the design process a few parameters must be decided upon. The designer needs to know the following:
11
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