Infineon TLE4284DV33ATMA1 3V Low-Drop Voltage Regulator: Datasheet, Pinout, and Application Circuit Guide
The Infineon TLE4284DV33ATMA1 is a robust and highly reliable low-dropout (LDO) linear voltage regulator designed to deliver a fixed 3.3V output at a maximum current of 150 mA. Engineered for the demanding environments of automotive electronics, this IC offers exceptional performance, stability, and protection features, making it a cornerstone component for power management in a wide array of applications.
Key Features and Datasheet Highlights
According to its datasheet, the TLE4284DV33ATMA1 is distinguished by several critical characteristics:
Low Dropout Voltage: With a typical dropout of only 350 mV at 150 mA, it can maintain regulation even when the input voltage is very close to the output level. This maximizes efficiency and is crucial for battery-powered systems where every volt counts.
Very Low Quiescent Current: The device features an extremely low ground current, both in operation and in standby mode, which is essential for reducing power consumption and prolonging battery life.
Outstanding Protections: It incorporates comprehensive protection mechanisms, including overcurrent limitation, overtemperature shutdown, and reverse polarity protection. This ruggedness ensures the device's survival in harsh electrical environments, such as the 12V automotive power system.
High Accuracy: The output voltage is guaranteed to within ±2% accuracy over the entire temperature range, providing a stable and precise supply for sensitive loads like microcontrollers and sensors.
Wide Operating Range: The input voltage can be as high as 42 V, making it immune to load dump transients common in vehicles.
Pinout Configuration
The TLE4284DV33ATMA1 is available in a TO-252-3 (DPAK) package, a surface-mount package with a tab that provides excellent thermal performance. The pinout is simple:
Pin 1 (IN): This is the input voltage pin. A input capacitor must be connected close to this pin for stability.
Pin 2 (GND): The ground pin for the IC.
Pin 3 (OUT): The regulated 3.3V output pin. An output capacitor is required between this pin and ground to ensure stability and improve transient response.
The metal tab is also electrically connected to the OUT pin, which must be considered during PCB layout for heat dissipation.
Application Circuit Guide
A typical application circuit for the TLE4284DV33ATMA1 is straightforward, requiring only a few external components.
1. Input Capacitor (C_IN): A ceramic capacitor with a value of 100 nF to 1 µF should be placed as close as possible to the IN pin and GND. This capacitor decouples the input and suppresses high-frequency noise.
2. Output Capacitor (C_OUT): A capacitor on the output is mandatory for loop stability. The datasheet recommends a minimum value of 2.2 µF with an Equivalent Series Resistance (ESR) between 0.1 Ω and 10 Ω. A standard aluminum electrolytic or a tantalum capacitor is suitable. Place it close to the OUT pin.
The basic circuit involves connecting the input voltage (e.g., a 12V car battery) to IN, and the load (e.g., an ECU microcontroller) to OUT. The regulator will efficiently provide a clean, stable 3.3V supply.
Common Applications
This LDO is ideal for any system requiring a stable low-voltage rail from a higher, noisier input source. Its primary use is in automotive electronics, such as:
Body control modules (BCMs)
Instrument clusters
Infotainment systems
Engine control units (ECUs) for sensors
It is also perfectly suited for industrial control systems and other consumer applications where reliability is paramount.
ICGOODFIND: The Infineon TLE4284DV33ATMA1 stands out as an exceptionally robust and reliable solution for 3.3V power regulation. Its combination of low dropout voltage, high input voltage tolerance, and extensive built-in protection makes it an superior choice, particularly for automotive and industrial designs where electrical stress and environmental conditions are extreme. Its simple implementation belies its powerful performance, offering engineers a dependable foundation for their power supply architecture.
Keywords: Low-Dropout (LDO) Regulator, Automotive Electronics, 3.3V Output, Reverse Polarity Protection, Voltage Regulation.
