Infineon TLE4274DV33 5V to 3V Low-Drop Voltage Regulator: Features and Application Circuit Design

The Infineon TLE4274DV33 is a monolithic integrated low-drop voltage regulator designed to deliver a fixed 3.3V output from a typical 5V input rail with high accuracy and efficiency. As a critical component in power management, it is engineered for applications requiring a stable, clean, and reliable voltage supply with minimal power loss. Its low-dropout voltage characteristic is a key advantage, enabling continued regulation even when the input voltage dips close to the output level, making it exceptionally suited for automotive, industrial, and consumer electronics where power fluctuations are common.

Key Features of the TLEER4274DV33

The regulator boasts a robust set of features that underscore its versatility and reliability. A standout feature is its extremely low current consumption in standby mode, typically just 18 µA, which is crucial for battery-powered or energy-sensitive applications. It is equipped with a range of built-in protection mechanisms, including overload protection, short-circuit protection, and overtemperature shutdown, ensuring the device and the downstream circuitry are safeguarded under fault conditions. Furthermore, it offers excellent line and load regulation, maintaining a stable 3.3V output despite variations in the input voltage or changes in the load current. The maximum output current of 400 mA covers a broad spectrum of low-power microcontroller units (MCUs), sensors, and other ICs.

Typical Application Circuit Design

Implementing the TLE4274DV33 in a circuit is straightforward, requiring only a few external components for stable operation. A standard application diagram is shown below.

```

VIN (5V) ----+---