TPS54302 Datasheet, PDF (13/28 Pages) Texas Instruments – TPS54302 4.5-V to 28-V Input, 3-A Output, EMI Friendly Synchronous Step-Down Converter

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8 Application and Implementation
TPS54302
SLVSDG6A – MAY 2016 – REVISED MAY 2016
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The TPS54302 is typically used as a step down converter, which converts an input voltage from 8 V - 28 V to a
fixed output voltage of 5 V.
8.2 Typical Application
8.2.1 TPS54302 8-V to 28-V Input, 5-V Output Converter
VIN= 8V ~ 28V
VIN
R4
C1
10uF
C2
0.1uF
511l Q
U1
TPS54302
3 _VIN
6
BOOT
1 _GND
2
SW
C3
0.1uF
5 _EN
FB ⁴
R5
105l Q
L1 10uH
VOUT=5V,3A
C4 C5
22uF 22uF
C6
75pF
VOUT
R1
49.9 Q
R2
100l Q
R3
13.3l Q
Figure 15. 5-V, 3-A Reference Design
Copyright © 2016, Texas Instruments Incorporated
8.2.2 Design Requirements
For this design example, use the parameters in Table 1.
Table 1. Design Parameters
PARAMETER
Input voltage range
Output voltage
Output current
Transient response, 1.5-A load step
Input ripple voltage
Output voltage ripple
Switching frequency
VALUE
8 V to 28 V
5V
3A
ΔV_OUT = ±5 %
400 mV
30 mVpp
400 kHz
Copyright © 2016, Texas Instruments Incorporated
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