Texas Instruments TPS5430, Руководство пользователя

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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
Table 1-1 . 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 Table 1-2 . Specifications are
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
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2 TPS5430 and TPS5431 Step-Down Converter Evaluation Module User's
Guide SLVU157A – MARCH 2006 – REVISED OCTOBER 2021
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