Infineon TLE4276DVATMA2 5V Voltage Regulator: Datasheet, Pinout, and Application Circuit Guide
The Infineon TLE4276DVATMA2 is a robust, low-dropout (LDO) voltage regulator designed to deliver a precise 5V output from a higher input voltage. As a critical component in automotive and industrial electronics, it ensures stable power supply to microcontrollers, sensors, and other sensitive circuitry, even in harsh environments. This guide explores its key specifications, pinout configuration, and a standard application circuit.
Datasheet Overview and Key Specifications
The TLE4276DVATMA2 is part of Infineon's renowned LDO family, known for its high reliability and performance. Key parameters from the datasheet include:
Output Voltage: Fixed at 5.0 V with an accuracy of ±2%.
Output Current: Capable of delivering up to 400 mA of continuous current.
Dropout Voltage: Features a low dropout voltage of typically 450 mV at full load (400 mA), enhancing efficiency.
Input Voltage Range: Operates from 5.5 V to 42 V, making it ideal for 12V and 24V automotive systems which are subject to load dump and transients.
Protection Features: Includes comprehensive built-in protections such as reverse polarity protection, overcurrent limitation, overtemperature shutdown, and overvoltage protection (load dump).
Low Quiescent Current: Consumes only a typical 50 µA in standby mode, which is crucial for battery-powered applications.
Package: Supplied in a PG-TO252-5 (DPAK-5) package, which offers good thermal performance for power dissipation.
Pinout Configuration
The TLE4276DVATMA2 comes in a 5-pin package. Understanding each pin's function is essential for proper circuit design:
1. IN (Pin 1): Input voltage pin. A capacitor must be connected between this pin and ground for stability and filtering.
2. GND (Pin 2): Ground pin.
3. ENABLE (Pin 3): Enable control pin. A high-level signal (> 2.0V) turns the regulator ON. This pin can be pulled to the IN pin if not used for logic control.
4. DELAY (Pin 4): Connects to an external capacitor to program the delay time for the reset signal.
5. OUT (Pin 5): Regulated 5V output pin. Requires a capacitor to ground for stability.
Standard Application Circuit Guide
A typical application circuit for the TLE4276DVATMA2 is straightforward but requires specific external components for optimal operation.
1. Input Capacitor (CIN): A 10 µF ceramic or electrolytic capacitor should be placed as close as possible to the IN pin and GND. This capacitor suppresses incoming voltage spikes and ensures stability.
2. Output Capacitor (CQ): A 4.7 µF ceramic capacitor is recommended on the OUTPUT pin to ground. It is critical for the regulator's stability and transient response.
3. Enable Control: The ENABLE pin can be driven directly by a microcontroller's GPIO pin for power management. If this feature is not required, connect the pin directly to the IN pin.
4. Reset Delay Capacitor (CDELAY): A capacitor connected between the DELAY pin and GND sets the time delay for the internal reset circuit. The delay time is calculated as tDEL ≈ 250 kΩ × CDELAY. For example, a 100 nF capacitor creates a ~25 ms delay.
5. Thermal Management: Although the package has good thermal properties, ensure adequate PCB copper area or a heatsink if the power dissipation (VIN - VOUT) × IOUT is high.
ICGOODFIND Summary
The Infineon TLE4276DVATMA2 is an exceptionally robust and versatile 5V LDO voltage regulator. Its wide input voltage range and extensive suite of protection features make it a premier choice for demanding automotive and industrial applications. The inclusion of an enable pin and a configurable reset delay adds valuable functionality for system-level power management and microcontroller supervision. When designing with this IC, careful attention to input/output capacitor selection and layout is crucial for achieving the specified performance and reliability.
Keywords: Low-Dropout (LDO) Regulator, Automotive Grade, Overvoltage Protection, 5V Output, Reset Function.
