The TPS54424 dc/dc converter is a synchronous buck converter designed to provide up to an 4-A output. The input (VIN) is rated for 4.5 V to 17 V. Rated input voltage and output current range for the evaluation module are 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 TPS54424 regulator. The RT/CLK pin is configured for 700-kHz switching frequency. The high-side and low-side MOSFETs are incorporated inside the TPS54424 package along with the gate-drive circuitry. The low drain-to-source on-resistance of the MOSFET allows the TPS54424 to achieve high efficiencies and helps keep the junction temperature low at high output currents. An external divider allows for an adjustable output voltage. Additionally, the TPS54424 provides adjustable soft start and undervoltage lockout inputs and a power good output.

A summary of the TPS54424EVM-779 performance specifications is provided in Table 1-2. Specifications are given for an input voltage of V_IN = 12 V and an output voltage of 1.8 V, unless otherwise specified. The TPS54424EVM-779 is designed and tested for V_IN = 4.5 V to 17 V. The ambient temperature is 25°C for all measurements, unless otherwise noted.