Trademarks
PowerPAD
™
is a trademark of Texas Instruments.
All trademarks are the property of their respective owners.
1 Introduction
This user's guide contains background information for the TPS5430 and TPS5431 as well as support
documentation for the TPS5430EVM-173 evaluation module (HPA173-001) and the TPS5431EVM-173
evaluation module (HPA173-002) . Also included are the performance specifications, the schematic, and the
bill of materials for the TPS5430EVM-173 and the TPS5431EVM-173.
1.1 Background
The TPS5430 and TPS5431 dc/dc converters are designed to provide up to a 3-A output from an input
voltage source of 5.5 V to 36 V (TPS5430) or 5.5 V to 23 V (TPS5431EVM-173). Rated input voltage and
output current range for the evaluation module is given in
. This evaluation module is designed to
demonstrate the small printed-circuit-board areas that may be achieved when designing with the TPS5430 and
TPS5431 regulators. The switching frequency is internally set at a nominal 500 kHz. The high-side MOSFET
is incorporated inside the TPS5430/31 package along with the gate drive circuitry. The low drain-to-source on
resistance of the MOSFET allows the TPS5430/31 to achieve high efficiencies and helps keep the junction
temperature low at high output currents. The compensation components are provided internal to the integrated
circuit (IC), whereas an external divider allows for an adjustable output voltage. Additionally, the TPS5430/31
provides an enable input. The absolute maximum input voltage is 38 V for the TPS5430EVM-173 and 25 V for
the TPS5431EVM-173 .
Table 1-1. Input Voltage and Output Current Summary
EVM
INPUT VOLTAGE RANGE
OUTPUT CURRENT RANGE
TPS5430EVM-173
VIN = 10 V to 35 V
0 A to 3 A
TPS5431EVM-173
VIN = 9 V to 21 V
0 A to 3 A
1.2 Performance Specification Summary
A summary of the TPS5430EVM-173 performance specifications is provided in
given for an input voltage of VIN = 15 V and an output voltage of 5 V, unless otherwise specified. The
TPS5430EVM-173 is designed and tested for VIN = 10 V to 35 V. The ambient temperature is 25°C for all
measurements, unless otherwise noted.
Table 1-2. TPS5430EVM-173 and TPS5431EVM-173 Performance Specification Summary
SPECIFICATION
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIN voltage range
TPS5430EVM-173
10
15
35
V
TPS5431EVM-173
9
15
21
Output voltage set point
5.0
V
Output current range
V
IN
= 3.3 V
0
3
A
Line regulation
TPS5430EVM-173
I
O
= 0 A – 3 A, VIN = 10 V – 35 V
±0.07%
TPS5431EVM-173
I
O
= 0 A – 3 A, VIN = 9 V – 21 V
±0.04%
Load regulation
TPS5430EVM-173
VIN = 15 V, I
O
= 0 A to 3 A
±0.03%
TPS5431EVM-173
±0.05%
Load transient
response
TPS5430EVM-173
I
O
= 0.75 A to 2.25 A
Voltage change
–50
mV
Recovery time
150
μs
TPS5431EVM-173
Voltage change
–40
mV
Recovery time
150
μs
TPS5430EVM-173
I
O
= 2.25 A to 0.75 A
Voltage change
50
mV
Recovery time
150
μs
TPS5431EVM-173
Voltage change
40
mV
Recovery time
150
μs
Trademarks
2
TPS5430 and TPS5431 Step-Down Converter Evaluation Module User's
Guide
SLVU157A – MARCH 2006 – REVISED OCTOBER 2021
Copyright © 2021 Texas Instruments Incorporated
