The L4947H-5 from STMicroelectronics is a robust automotive-grade voltage regulator designed to deliver a precise 5V output. This device is specifically engineered to withstand the harsh conditions commonly found in automotive environments. The L4947H-5 integrates multiple features making it an ideal power supply solution for automotive electronic control units (ECUs), instrument clusters, and other sensitive automotive electronics.

Key Features

• Output Voltage: Provides a stable 5V output with an output current capability of up to 500mA, ensuring reliable performance for connected components.
• Low Dropout: The low dropout voltage allows for efficient operation even when the input voltage is close to the output voltage, reducing power loss and improving efficiency.
• Thermal Protection: Features thermal shutdown protection that safeguards the device and the load from damage due to excessive temperature.
• Short-Circuit Protection: The built-in short-circuit protection feature prevents damage to the regulator and the load in case of a fault condition.
• Load Dump Protection: Capable of withstanding high-energy load dump pulses, which are common in automotive power lines due to sudden battery disconnection.
• Reverse Battery Protection: Protects the device and the load against potential damage from battery reversal, a critical feature for automotive applications.

Applications

The L4947H-5 is particularly suited for automotive applications where a stable and reliable power supply is crucial. Its robustness and integrated protection features make it an excellent choice for:

• Automotive electronic control units (ECUs)
• Instrument clusters
• Infotainment systems
• Body control modules

Quality and Reliability

STMicroelectronics is dedicated to delivering high-quality products. The L4947H-5 voltage regulator is manufactured to meet the stringent requirements of the automotive industry, ensuring reliability and performance even under the most demanding conditions.