The TPS4021x is a 4.5-V to 52-V low-side controller with an integrated gate driver for a low-side N-channel MOSFET. This device is typically used in a boost topology to convert a lower DC voltage to a higher DC voltage with a peak current limit set by an external current sense resistor. It can also be configured in a SEPIC, Flyback and LED drive applications. In higher current applications, the maximum current can also be limited by the thermal performance of the external MOSFET and rectifying diode switch. Use the following design procedure to select external components for the TPS4021x. The design procedure illustrates the design of a typical boost regulator with the TPS40210. Alternatively, use the WEBENCH software to generate a complete design. The WEBENCH software uses an iterative design procedure and accesses a comprehensive database of components when generating a design.