TLE 4270 is a 5V low-drop fixed voltage regulator produced by Texas Instruments. The maximum input voltage is 42 V (65 V, ≤ 400 ms). Up to an input voltage of 26 V and for an output current of up to 550 mA it regulates the output voltage within a 2 % accuracy. The short circuit protection limits the output current of more than 650 mA. The device also incorporates overvoltage protection and temperature protection that disables the circuit at unpermissibly high temperatures.
The Siemens TLE 4270 is a 5‑V low‑drop fixed‑voltage regulator designed for automotive electronics and other applications requiring stable output. It features over‑temperature, over‑voltage and reverse‑polarity protection, as well as short‑circuit proof operation.
The document provides detailed functional description, pin configuration, absolute maximum ratings, operating ranges, electrical characteristics, reset generator behavior, and packaging information for various TO‑220 and TO‑263 variants.
| Output voltage tolerance | < +2 % |
|---|---|
| Maximum input voltage (continuous) | 42 V |
| Maximum input voltage (short pulse) | 65 V (< 400 ms) |
| Output current (typical) | 550 mA |
| Output current (limit) | 650 mA |
| Drop voltage (typical at 550 mA) | 350 mV |
| ESD protection | > 4000 V |
| Operating temperature range | -40 °C to 150 °C (junction) |
The regulator can tolerate a continuous input voltage of 42 V and a short‑duration spike up to 65 V for less than 400 ms.