Datasheet

+
PwPd
10.8-19.8V
L1
15 Hm
6
4
9
5
2
3
GND
VSNS
VIN
NC
NC
ENA
BOOT
PH
7
1
8
C1
10 Fm
C3
220 Fm
D1
B340A
C2
0.01 Fm
VOUT
5V
R2
3.24kW
R1
10kW
VIN
EN
U1
TPS5430DDA
0.080
0.026
0.098
0.118
0.050
0.110
0.220
0.050
0.040
0.013DIA 4PL
Alldimensionsininches
TPS5430
TPS5431
SLVS632E –JANUARY 2006–REVISED SEPTEMBER 2013 www.ti.com
Figure 10. TPS5430 Land Pattern
Application Circuits
Figure 11 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 V. For proper thermal performance, the exposed PowerPAD™
underneath the device must be soldered down to the printed-circuit board.
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
Designer Software may be used to generate a complete design. The 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:
• Input voltage range
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