Infineon TLE42764GV50ATMA1 5V Voltage Regulator: Datasheet, Pinout, and Application Circuit

The Infineon TLE42764GV50ATMA1 is a robust, low-dropout (LDO) voltage regulator designed to deliver a precise 5V output voltage at a maximum current of up to 450 mA. Housed in a space-saving PG-TO263-5 package, this IC is engineered for demanding automotive and industrial applications, offering exceptional reliability and protection features. This article provides a detailed overview of its key specifications, pinout configuration, and a typical application circuit.

Datasheet Overview and Key Features

The TLEON TLE42764 is more than a simple regulator; it is a fully integrated power management solution. Its standout features, as detailed in its datasheet, include:

Very Low Dropout Voltage: Typically 200 mV at 300 mA load, allowing it to function correctly even when the input voltage is very close to the 5V output level, minimizing power loss.

High Accuracy: The output voltage is accurate to within ±2%, which is critical for powering sensitive microcontrollers and sensors.

Wide Input Voltage Range: It can accept an input voltage from 5.5V up to 42V, making it suitable for 12V and 24V automotive systems that experience load dump and other voltage transients.

Comprehensive Protection Suite: The device includes overcurrent protection (OCP), overtemperature protection (OTP), and reverse polarity protection. Crucially, it also features a reset output with a configurable delay time, which provides a defined signal to a microcontroller upon power-up and during undervoltage events.

Low Quiescent Current: In normal operation, it consumes a very low standby current, which is vital for battery-powered systems.

Pinout Configuration

The TLE42764GV50ATMA1 is available in a 5-pin TO-263 package (D²PAK). The pinout is as follows:

1. IN (Pin 1): Input Voltage Pin. This pin must be connected to the supply voltage. A capacitor must be placed close to this pin for stability and filtering.

2. GND (Pin 2): Ground Pin.

3. RESET (Pin 3): Reset Output (Open Collector). This active-low output goes low when the output voltage falls below a certain threshold or during startup. It requires an external pull-up resistor to a suitable voltage rail (e.g., the regulated 5V output).

4. DELAY (Pin 4): Reset Delay Capacitor Pin. A capacitor connected between this pin and ground sets the time delay for the reset signal after the output voltage becomes stable.

5. OUT (Pin 5): Regulated 5V Output. A capacitor must be connected from this pin to ground to ensure stability.

Typical Application Circuit

A standard application circuit for the TLE42764 is straightforward to implement. The core design requires only a few external components:

1. Input Capacitor (C_IN): A ceramic capacitor (e.g., 100 nF) should be placed as close as possible between the IN pin and GND to suppress high-frequency noise.

2. Output Capacitor (C_OUT): A low-ESR ceramic capacitor (e.g., 1 µF to 10 µF) is required between the OUT pin and GND for loop stability and to improve transient response.

3. Reset Delay Capacitor (C_D): A capacitor (typically in the range of 10 nF to 100 nF) is connected from the DELAY pin to GND. The value of this capacitor determines the reset delay time (t_D = C_D 21.5 kΩ).

4. Pull-up Resistor (R_PU): A resistor (e.g., 10 kΩ) is needed to pull the open-collector RESET output pin to the logic voltage level of the microcontroller's reset input (often VCC).

In an automotive setting, the input would be connected to the vehicle battery (12V), and the stable 5V output would power an ECU, sensor cluster, or infotainment system, with the reset signal ensuring controlled microcontroller initialization.

ICGOODFIND Summary

The Infineon TLE42764GV50ATMA1 is an exceptional LDO voltage regulator that combines high performance with robust protection features. Its ability to handle a wide input voltage range, provide a precise 5V output, and generate a managed reset signal makes it an ideal choice for harsh automotive and industrial environments. Its design simplicity, requiring minimal external components, allows for a reliable and compact power supply solution.

Keywords: LDO Voltage Regulator, Automotive Grade, Reset Circuit, Dropout Voltage, Infineon