Infineon TLE4296-2GV50 Low-Dropout Voltage Regulator: Features and Application Circuits
The Infineon TLE4296-2GV50 is a robust, monolithic integrated low-dropout voltage regulator designed to deliver a precise 5.0V output with a maximum current of 150 mA. Engineered for the demanding environments of automotive electronics, it is equally suited for industrial and consumer applications where reliability and space efficiency are paramount.
Key Features and Advantages
The TLE4296-2GV50 distinguishes itself with a suite of features that ensure stable and protected operation:
Very Low Current Consumption: With a typical quiescent current of only 28 µA, it is ideal for battery-powered applications, significantly extending operational life.
Low Dropout Voltage: The low dropout voltage of typically 200 mV (at I_OUT = 50 mA) allows it to continue regulating even when the input voltage dips very close to the output level. This is crucial for cold-crank conditions in automotive systems.
Outstanding Accuracy: The output voltage is accurate to within ±2% over the entire temperature, input voltage, and load current ranges, providing a stable supply for sensitive digital and analog circuits.
Comprehensive Integrated Protection: The IC includes overload protection, short-circuit protection, and overtemperature protection. These features safeguard both the regulator and the connected load from damage under fault conditions.
Wide Operating Range: An input voltage range from 5.5 V to 42 V makes it exceptionally robust against voltage spikes and load dumps common in 12V and 24V vehicle systems.
Enable Function: An enable pin (EN) allows for external switching of the regulator, facilitating power management strategies to further reduce system quiescent current.
Typical Application Circuits
The TLE4296-2GV50 is simple to implement, requiring only a few external components for most use cases.
1. Standard Application Circuit:
The most straightforward implementation involves connecting input and output capacitors.
Input Capacitor (C_IN): A 100 nF ceramic capacitor placed close to the VIN pin is recommended to improve stability and suppress high-frequency noise.
Output Capacitor (C_OUT): A minimum output capacitor of 1 µF is required for stability. A ceramic capacitor with low ESR (Equivalent Series Resistance) is ideal and should be placed as close as possible to the VOUT and GND pins. This capacitor determines the regulator's dynamic response and loop stability.
2. Circuit with Enable Control:
For advanced power management, the enable pin can be used. Pulling the EN pin high (> 2.0 V) activates the regulator. Pulling it low (< 0.8 V) switches the device into a low-power standby mode, reducing the quiescent current to a minimum. This pin can be driven directly by a microcontroller GPIO pin or a logic signal.
3. High-Current and Transient Response:
For applications with higher transient current demands, increasing the output capacitor value (e.g., to 10 µF or 22 µF) will improve the transient response and provide a more stable output voltage. A small ceramic bypass capacitor (100 nF) in parallel with the larger output capacitor can help filter high-frequency noise.
ICGOODFIND Summary
The Infineon TLE4296-2GV50 is a highly reliable and efficient low-dropout voltage regulator, offering exceptional accuracy, robust protection features, and ultra-low quiescent current. Its simplicity of use, combined with its ability to withstand harsh electrical environments, makes it an excellent choice for powering microcontrollers, sensors, and other critical subsystems in automotive and industrial applications.
Keywords:
Low-Dropout (LDO) Regulator
Automotive Grade
Quiescent Current
Overcurrent Protection
Voltage Regulation
