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TPS5430-Q1 Datasheet(PDF) 11 Page - Texas Instruments

Part # TPS5430-Q1
Description  TPS5430-Q1 3-A Wide-Input-Range Step-Down Converter
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS5430-Q1 Datasheet(HTML) 11 Page - Texas Instruments

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+
PwPd
10.8 - 19.8 V
L1
15
H
m
6
4
9
5
2
3
GND
VSNS
VIN
NC
NC
ENA
BOOT
PH
7
1
8
C1
10
F
m
C3
220
F
m
D1
B340A
C2
0.01
F
m
VOUT
5 V
R2
3.24 kW
R1
10 kW
VIN
EN
U1
TPS5430DDA
TPS5430-Q1
www.ti.com
SLVS751D – NOVEMBER 2007 – REVISED JULY 2015
8 Application and Implementation
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 TPS5430-Q1 is a 3-A, step down regulator with an integrated high side MOSFET. This device is typically
used to convert a higher DC voltage to a lower DC voltage with a maximum available output current of 3 A.
Example applications are: High Density Point-of-Load Regulators for Car Audio, High Power LED Supply, Battery
Chargers, and other 12-V and 24-V supplied systems. Use the following design procedure to select component
values for the TPS5430-Q1.
8.2 Typical Applications
8.2.1 Application Circuit, 12 V to 5 V
Figure 9 shows the schematic for a typical TPS5430-Q1 application. The TPS5430-Q1 can provide up to 3-A
output current at a nominal output voltage of 5 V. For proper thermal performance, the exposed thermal pad
underneath the device must be soldered down to the printed-circuit-board.
Figure 9. Application Circuit, 12 V to 5 V
8.2.1.1 Design Requirements
For this design example, use the following as the input parameters:
DESIGN PARAMETER(1)
EXAMPLE VALUE
Input voltage range
10.8 V to 19.8 V
Output voltage
5 V
Input ripple voltage
300 mV
Output ripple voltage
30 mV
Output current rating
3 A
Operating frequency
500 kHz
(1)
As an additional constraint, the design is set up to be small size and low component height.
Copyright © 2007–2015, Texas Instruments Incorporated
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