Infineon TLE42764DV50 5V Voltage Regulator: Features, Applications, and Design Considerations
In the realm of automotive and industrial electronics, the demand for robust and reliable voltage regulation is paramount. The Infineon TLE42764DV50 stands out as a quintessential solution, a 5V low-dropout (LDO) voltage regulator engineered to deliver exceptional performance in the harshest of environments. This integrated circuit is designed to provide a stable 5V output from a higher input voltage, making it a cornerstone in power supply designs for a vast array of applications.
Key Features and Technical Specifications
The TLEER42764DV50 is packed with features that underscore its robustness and versatility. Its very low current consumption in standby mode makes it ideal for battery-powered systems where energy efficiency is critical. A core attribute is its extremely low dropout voltage, typically 200 mV at a 150 mA load, which allows it to continue regulating the output voltage even when the input voltage dips very close to 5V. This maximizes the usable input voltage range and is crucial during cranking conditions in automotive systems.
The regulator incorporates a comprehensive suite of protection mechanisms. It features internal current limiting to safeguard the device and the load during output short-circuits. Furthermore, it includes overtemperature protection that shuts down the IC if the junction temperature exceeds a safe threshold, preventing thermal runaway. An integrated reverse polarity protection of up to -40V ensures survival in cases of accidental battery misconnection, a common requirement in automotive scenarios. The device also offers a reset output with an adjustable delay time, which provides a defined signal to a microcontroller during power-up, power-down, or during an undervoltage event, ensuring controlled system initialization.
Primary Applications
The TLE42764DV50's rugged design makes it a perfect fit for automotive electronics, where it powers microcontrollers, sensors, and other critical logic components. It is commonly found in engine control units (ECUs), body control modules, and infotainment systems. Its ability to handle high input voltage transients, as per ISO 7637-2, makes it indispensable in this field.
Beyond automotive, its applications extend to any industrial or consumer system requiring a clean, stable 5V rail. This includes industrial automation systems, embedded computing modules, and telecommunication equipment. Whenever a design requires protection against harsh electrical conditions and high reliability, this LDO is a top contender.
Critical Design Considerations
Successful implementation of the TLE42764DV50 requires careful attention to several design aspects. Input and output capacitor selection is vital for stability and suppressing voltage spikes. Infineon recommends specific types and values (e.g., a 4.7 μF capacitor on the output) to ensure optimal performance; deviating from these recommendations can lead to oscillations.
Thermal management is another crucial factor. While the built-in overtemperature protection is a safety net, the regulator must be operated within its safe operating area (SOA). Designers must calculate the power dissipation (P_diss = (V_in - V_out) I_load) and ensure the junction temperature remains within limits, potentially requiring a PCB heatsink or adequate copper pour for the exposed pad (PG-TO252-5 package).
Furthermore, the adjustable reset delay time, set by an external capacitor, must be chosen to match the startup characteristics of the downstream microcontroller to guarantee a proper and reliable reset sequence.
The Infineon TLE42764DV50 is a highly integrated, robust, and feature-rich 5V voltage regulator. Its combination of low dropout voltage, extensive protection features, and diagnostic capability (reset output) makes it an exceptional choice for designers tackling challenging automotive and industrial environments, ensuring system stability and longevity.
Keywords:
Low-Dropout (LDO) Regulator
Automotive Electronics
Reverse Polarity Protection
Voltage Regulation
Reset Output
