This document introduces the technical data of the low-drop voltage tracker TLE 4251 in the P-TO252-5-1 and P-TO263-5-1 packages. The product features output tracking tolerance of ≤ ± 0.2%, 400mA output current capability, enable function, very low current consumption in OFF mode, etc. In addition, the product is equipped with functions such as short circuit protection, overtemperature protection, and reverse polarity protection. It is designed to supply sensors under the severe conditions of automotive applications. The document also provides pin configuration and ordering information of the product.