The TPS543320 dc/dc converter is a synchronous buck converter designed to provide up to a 3-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 TPS543320 package along with the gate-drive circuitry. The low drain-to-source on-resistance of the MOSFET allows the TPS543320 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 TPS543320 FSEL and MODE pins provide selectable switching frequency, soft start time, current limit, and internal compensation. Lastly, the TPS543320 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 TPS543320. The first design is designed to demonstrate the small printed-circuit-board areas that may be achieved when designing with the TPS543320 regulator. The small area design fits within 100 mm². The second design is designed to demonstrate the high efficiency that can be achieved when designing with the TPS543320 regulator. The second design also includes jumpers that can be used to easily evaluate the features of the TPS543320.