Infineon BCR35PNE6327: A 350 mA Low-Dropout Linear Regulator for General Purpose Applications

The Infineon BCR35PNE6327 is a monolithic integrated low-dropout (LDO) linear voltage regulator designed to deliver a robust and stable fixed output voltage of 3.3 V with a maximum output current of 350 mA. Housed in a compact, space-saving SOT143-4 surface-mount package (PG-SOT143-4-1), it is engineered for a broad spectrum of general-purpose applications where reliable voltage regulation is paramount.

A key strength of this regulator is its exceptionally low dropout voltage, typically 200 mV at 100 mA load current. This characteristic is critical for battery-powered and energy-efficient devices, as it allows the IC to continue regulating the output voltage effectively even when the input voltage dips very close to the output level, thereby maximizing battery life and operational headroom. The device operates with a wide input voltage range from 2.5 V to 40 V, offering significant design flexibility for systems connected to unregulated or noisy power sources like automotive batteries or 24V industrial rails.

Beyond its core regulation function, the BCR35PNE6327 integrates vital protection features to enhance system reliability. It includes built-in current limiting and thermal shutdown circuits. The current limiter protects both the regulator and the load from damage during short-circuit or overload conditions, while the thermal shutdown feature deactivates the device if the junction temperature exceeds a safe threshold, reactivating only once it has cooled sufficiently.

Furthermore, the component exhibits low quiescent current, making it an excellent choice for always-on or standby circuits where power conservation is essential. Its design ensures good load and line regulation, maintaining a stable 3.3 V output despite variations in input voltage or output current.

Typical applications are vast and include:

Powering microcontrollers (MCUs), sensors, and logic circuits in automotive and industrial environments.

Acting as a local, clean supply rail downstream from a noisy switching regulator.

Use in consumer electronics, such as set-top boxes, routers, and smart home devices.

Serving as a reliable voltage reference in various analog circuits.

ICGOODFIND: The Infineon BCR35PNE6327 stands out as a highly versatile and robust LDO regulator. Its combination of a wide input voltage range up to 40 V, a low dropout voltage, and integrated protection mechanisms makes it an ideal, dependable choice for stabilizing voltage in a multitude of general-purpose electronic designs, particularly those demanding resilience in harsh electrical environments.

Keywords: Low-Dropout (LDO) Regulator, 350 mA Output Current, 3.3 V Fixed Output, Wide Input Voltage Range, Thermal Shutdown Protection.