Infineon TLE4295GV33HTSA1 3V Low-Dropout Voltage Regulator: Datasheet, Pinout, and Application Circuit Guide

The Infineon TLE4295GV33HTSA1 is a monolithic integrated low-dropout voltage regulator designed to provide a fixed, precisely regulated 3.3V output voltage. As a member of Infineon's renowned LDO family, this IC is engineered for demanding automotive and industrial applications, offering exceptional reliability, thermal stability, and protection features. This guide delves into its key specifications, pinout configuration, and a typical application circuit to facilitate seamless integration into your designs.

Datasheet Overview and Key Features

The TLE4295GV33HTSA1 is a robust LDO regulator capable of delivering a maximum output current of 250 mA. Its defining characteristic is its extremely low dropout voltage, typically 200 mV at 150 mA load, which maximizes efficiency and allows operation with input voltages very close to the 3.3V output level. This is crucial for battery-powered systems where every volt counts.

Key features extracted from the datasheet include:

Output Voltage: Fixed at 3.3 V (±2% accuracy).

Low Quiescent Current: Typically 50 µA, which minimizes power loss in standby modes.

Wide Input Voltage Range: From 3.5 V up to 42 V, making it highly resilient to load-dump and transients common in automotive environments.

Comprehensive Protection: The IC incorporates over-current protection (OCP), over-temperature protection (OTP), and reverse polarity protection.

Enable Function: A dedicated enable pin (EN) allows for logic-level control of the regulator's operation, facilitating power management to shut down the device and reduce quiescent current to a minimum.

Status Output: A reset output pin (RST) provides a signal to a microcontroller when the output voltage is out of tolerance, ensuring safe system operation.

Pinout Configuration

The TLE4295GV33HTSA1 is available in a PG-TO252-5-11 (also known as DPAK-5) package. The pinout is as follows:

1. IN (Input): This pin connects to the input supply voltage. A capacitor must be placed close to this pin for stability.

2. GND (Ground): The ground reference for the IC.

3. EN (Enable): A high-level signal (≥ 2 V) enables the regulator. Pulling this pin low (≤ 0.8 V) switches the regulator into a low-power standby mode.

4. RST (Reset Output): This open-drain output goes low when the regulated output voltage falls below a certain threshold, signaling a reset condition to a microcontroller.

5. OUT (Output): The regulated 3.3V output. A capacitor is required here for stability and improving transient response.

Typical Application Circuit

A standard application circuit for the TLE4295GV33HTSA1 is straightforward to implement. The schematic below illustrates the necessary external components for stable operation.