TPS54873PWPR

TPS54873PWPR is a voltage regulator integrated circuit (IC) in the Power Management Integrated Circuit (PMIC) family. It belongs to a DC DC Switching Regulator category and is designed to deliver a regulated output voltage (Vout), at most equal to its input voltage (Vin), regardless of the load of the system. The IC contains a control IC, power MOSFET, inductor, and boot capacitor.

The IC operates in two modes: discontinuous conduction mode (DCM) and continuous conduction mode (CCM). In DCM, the inductor conducts current at a rate proportional to the output current. So if the output current increases, the inductor will be in conduction for a longer time. In CCM, the inductor is always in conduction and the current varies with the output current and input voltage. Both modes are common in switching voltage regulator ICs and the application determines which mode is used.

The TPS54873PWPR IC uses a peak current mode control and input voltage feed forward technique. A feedback loop is used to compare the output voltage with a reference voltage and it adjusts the peak inductor current to maintain the output voltage. The regulator output is provided by the internal power MOSFET. The circuit operates at the switching frequency of 1MHz and the duty cycle is adjusted to achieve the desired output.

The main application of TPS54873PWPR is in portable and notebook computing. The device comes in a 3x2.46mm WQFN-10 package and can be used to provide regulated outputs in the range of 0.6V to 5V. It is also suitable for applications such as automotive, telecom, and Industrial IoT. The device is capable of delivering a maximum output current of 4A at an efficiency of 95%.