Infineon BCR108S: Low-Dropout Linear Regulator for General Purpose Switching Applications

The Infineon BCR108S is a low-dropout (LDO) linear regulator designed to deliver stable and clean power in a wide array of general-purpose switching applications. As electronic systems become increasingly complex and power-sensitive, the demand for efficient, compact, and reliable voltage regulation has never been higher. The BCR108S meets this challenge by offering a robust solution that combines high performance with exceptional integration.

Housed in a space-saving SOT-23-3 package, this regulator is engineered for applications where board real estate is at a premium. Its low dropout voltage is a critical feature, enabling the device to continue regulating the output voltage even when the input voltage is only slightly higher than the desired output. This ensures stable operation and maximizes efficiency, particularly in battery-powered devices where maintaining voltage until the end of the discharge cycle is crucial.

A key advantage of the BCR108S is its integrated base-emitter resistor, which simplifies circuit design by reducing the number of external components required. This not only lowers the overall bill of materials (BOM) cost but also enhances system reliability. The device is capable of delivering an output current of up to 100 mA, making it suitable for powering a variety of loads, including microcontrollers (MCUs), sensors, and other low-power ICs.

The regulator is designed for an input voltage range of up to 42 V, providing significant headroom for various industrial and automotive environments. It offers a fixed output voltage version of 5 V, which is a common supply voltage for many digital circuits. Furthermore, the BCR108S exhibits excellent load and line regulation, ensuring a consistent output voltage despite fluctuations in input voltage or output current demand. Its low quiescent current also makes it an excellent choice for always-on applications.

Typical applications extend across numerous fields, including:

Automotive electronics: Powering infotainment systems, sensors, and control modules.

Industrial control systems: Providing clean power for PLCs, actuators, and interface logic.

Consumer electronics: Used in appliances, smart home devices, and set-top boxes.

Office equipment: Regulating voltage in printers, scanners, and networking devices.

ICGOOODFIND: The Infineon BCR108S stands out as a highly versatile and efficient LDO linear regulator. Its combination of a high input voltage range, low dropout voltage, and integrated design in a miniature package makes it an ideal choice for designers seeking to optimize power management in space-constrained, general-purpose switching applications.

Keywords: Low-Dropout Regulator, Voltage Regulation, SOT-23 Package, 100mA Output Current, General Purpose Switching.