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.
The TLE4251 is a monolithic low‑drop voltage tracker offered in a compact P‑TO252‑5‑1 SMD package. It is intended for sensor supply in harsh automotive environments and includes protection against overload, short‑circuit and reverse polarity. The device tracks supply voltages up to 40 V to a reference set by an external resistor, delivering up to 400 mA with high accuracy.
Key features include an enable pin for ultra‑low standby current, a wide operating temperature range (‑40 °C to 150 °C), and detailed pin‑out and block‑diagram information. The datasheet provides absolute maximum ratings, electrical characteristics, and example application circuits for designers.
| Output tracking tolerance | < 0.2 % |
|---|---|
| Output current capability | 400 mA |
| Maximum input voltage | 40 V (typical), 45 V absolute max |
| Operating temperature range | ‑40 °C to 150 °C |
| Package type | P‑TO252‑5‑1 (SOT‑23‑5) |
For loads up to 300 mA the tracking accuracy is 0.2 %.
The device is enabled by applying a high level to the EN pin; low disables it.
The TLE4251 includes short‑circuit, over‑temperature and reverse‑polarity protection.