Texas Instruments TPS543820EVM, User Manual, Page: 3 / 38

1 Introduction
1.1 Background
The TPS543820 dc/dc converter is a synchronous buck converter designed to provide up to a 8-A output. The
input (VIN) is rated for 4 V to 18 V. Rated input voltage and output current range for the evaluation module are
given in
Table 1-1 .
The high-side and low-side MOSFETs are incorporated inside the TPS543820 package along with the gate-
drive circuitry. The low drain-to-source on-resistance of the MOSFET allows the TPS543820 to achieve high
efficiencies and helps keep the junction temperature low at the rated output current. Fixed frequency advanced
current mode control allows you to synchronize the regulators to an external clock source. An external divider
allows for an adjustable output voltage. The TPS543820 FSEL and MODE pins provide selectable switching
frequency, soft start time, current limit, and internal compensation. Lastly, the TPS543820 includes an enable pin
and a power good output which can be used for sequencing multiple regulators.
This evaluation module includes two designs with the TPS543820. The first design is designed to demonstrate
the small printed-circuit-board areas that may be achieved when designing with the TPS543820 regulator. The
small area design fits within 100 mm
2
. The second design is designed to demonstrate the high efficiency that
can be achieved when designing with the TPS543820 regulator. The second design also includes jumpers that
can be used to easily evaluate the features of the TPS543820.
Table 1-1. Input Voltage and Output Current Summary
EVM INPUT VOLTAGE RANGE OUTPUT CURRENT RANGE
TPS543820EVM V
IN
= 4 V to 18 V 0 A to 8 A
1.2 Before You Begin
The following warnings and cautions are noted for the safety of anyone using or working close to the
TPS543820EVM. Observe all safety precautions.
Warning
The TPS543820EVM may become hot during operation due to dissipation of power
in some operating conditions. Avoid contact with the board. Follow all applicable
safety procedures applicable to your laboratory.
WARNING
The circuit module has signal traces, components, and component leads on the bottom of the board.
This may result in exposed voltages, hot surfaces or sharp edges. Do not reach under the board
during operation.
CAUTION
Some power supplies can be damaged by application of external voltages. If using more than
1 power supply, check your equipment requirements and use blocking diodes or other isolation
techniques, as needed, to prevent damage to your equipment.
www.ti.com Introduction
SLUUCE9A – DECEMBER 2020 – REVISED APRIL 2021
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