Infineon TLE4264GHTSA1 5V Low-Drop Voltage Regulator: Features, Applications, and Technical Overview

The Infineon TLE4264GHTSA1 is a monolithic integrated low-drop voltage regulator designed to deliver a fixed 5V output with a maximum current of 150 mA. Housed in a surface-mount PG-TO263-5-11 (DPAK) package, this IC is engineered for robustness and reliability in demanding automotive and industrial environments. Its core function is to provide a stable, clean voltage supply to microcontrollers, sensors, and other critical logic components, protecting them from the unpredictable fluctuations common in vehicle electrical systems or industrial power buses.

Key Features and Technical Specifications

The TLE4264GHTSA1 distinguishes itself through a suite of protective features and stable performance characteristics. A primary advantage is its very low current consumption in standby mode, which is crucial for modern applications requiring high efficiency, especially in battery-powered systems. The device boasts an extremely low dropout voltage, typically around 200 mV at full load (150 mA), allowing it to continue regulating effectively even when the input voltage dips close to the output level.

Beyond basic regulation, it incorporates comprehensive protection mechanisms. These include internal current limiting to safeguard against short-circuits at the output, overtemperature protection that shuts down the regulator if the junction temperature exceeds safe limits, and reverse polarity protection capable of withstanding negative voltages of up to -42V on the input pin. Furthermore, the reset function with a programmable delay is an invaluable feature for microprocessor supervision. It provides a reset signal to a µC during power-up, power-down, and in cases of output voltage dropout, ensuring controlled system initialization.

Primary Applications

The design and qualification of the TLE4264GHTSA1 make it ideally suited for a wide array of applications:

Automotive Electronics: Its ability to operate over a wide temperature range (-40°C to 150°C) and withstand load dump transients makes it perfect for body control modules, instrument clusters, and sensor power supplies.

Industrial Control Systems: Providing stable power for PLCs, sensors, and logic circuits in electrically noisy environments.

Consumer Electronics: Used in applications requiring a reliable, low-noise 5V rail from a higher unregulated input voltage.

Peripheral Power Supply: Powering USB peripherals, memory cards, and other low-power devices.

Technical Overview and Operation

The regulator requires only a few external components for operation: input and output capacitors for stability and filtering. The input voltage range is from 5.5V to 42V, with transient survival up to 45V. The output voltage is precision-trimmed to 5.0V ±2% accuracy. The reset function is controlled via an external capacitor connected to the delay pin, allowing designers to set the exact time delay for the reset signal after the output voltage has stabilized, which is critical for ensuring proper microprocessor boot-up sequences.

ICGOODFIND Summary

The Infineon TLE4264GHTSA1 is a highly robust and feature-rich 5V low-dropout voltage regulator. Its combination of very low dropout voltage, comprehensive protection features (including reverse polarity and overtemperature), and a dedicated microprocessor reset function makes it an exceptional choice for designers seeking reliability in harsh electrical environments, particularly in the automotive sector. It simplifies design-in while enhancing system safety and reliability.

Keywords:

Low-Dropout Regulator, Automotive Grade, Reverse Polarity Protection, Microprocessor Reset, 5V Voltage Regulator