LP2985IBPX-3.0

LP2985IBPX-3.0 Application Field and Working Principle

Linear voltage regulators are one of the most commonly used type of PMICs, and the LP2985IBPX-3.0 is a widely used one. It features a wide input voltage range of up to 12.6V, low quiescent current and a shutdown mode, while providing excellent output voltage accuracy and soft start capability. In this article, we\'ll explore the LP2985IBPX-3.0\'s application field and its operating principle.

Applications of LP2985IBPX-3.0

The LP2985IBPX-3.0 is a versatile linear voltage regulator designed for small, space-constrained applications that require very high performance. Its wide input voltage and low quiescent current make it the perfect choice for battery-powered applications, where current and space are at a premium. Additionally, its excellent input and output accuracy, coupled with its built-in soft start, makes it ideal for a range of applications, such as:

• Cellular smartphones
• Tablets
• Cordless telephones
• Industrial control devices
• Computer peripheral devices
• Handheld equipment

Working Principle of LP2985IBPX-3.0

The LP2985IBPX-3.0 is a linear voltage regulator, meaning that it uses linear electrical properties to regulate the output voltage. In a linear voltage regulator, the output voltage is directly proportional to the input voltage. When the input voltage is greater than the output voltage, the linear regulator will reduce the amplitude of the input voltage, producing an output voltage equal to or lower than the reference voltage.

The LP2985IBPX-3.0 voltage regulator uses an internal linear regulator to control the base-emitter voltage of the external transistor. When the input voltage is greater than the reference voltage, the internal linear regulator decreases the collector current and thus reduces the base-emitter voltage (Vbe) of the external transistor, in turn reducing the current supplied to the output terminal. When the input voltage is lower than the reference voltage, the internal linear regulator increases the collector current and conversely the Vbe of the external transistor, providing the output terminal with the increased current it needs to reach the desired voltage.

In summary, the LP2985IBPX-3.0 is a versatile, high-performance linear voltage regulator that is ideal for small, space-constrained applications. It is designed to regulate a wide range of input voltages, and can provide accurate and stable output voltages with near zero quiescent current. With its built-in soft start capability and thermal protection, the LP2985IBPX-3.0 is a great choice for battery-powered applications.