The TPS54821 DC/DC converter is designed to provide up to a 8-A output. The TPS54821 implements split-input power rails with separate input voltage inputs for the power stage and control circuitry. The power stage input (PVIN) is rated for 1.6 V to 17 V whereas the control input (VIN) is rated for 4.5 V to 17 V. The TPS54821EVM-049 provides both inputs but is designed and tested using the PVIN connected to VIN. 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 can be achieved when designing with the TPS54821 regulator. The switching frequency is externally set at a nominal 480 kHz. The high-side and low-side MOSFETs are incorporated inside the TPS54821 package along with the gate drive circuitry. The low drain-to-source on-resistance of the MOSFET allows the TPS54821 to achieve high efficiencies and helps keep the junction temperature low at high output currents. The compensation components are external to the integrated circuit (IC), and an external divider allows for an adjustable output voltage. Additionally, the TPS54821 provides adjustable slow start, tracking, and undervoltage lockout inputs. The absolute maximum input voltage is 20 V for the TPS54821EVM-049.