LF18CDT

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Linear voltage regulators are one of the most common power management solution for many applications, allowing for precise voltage regulation and accurate current limitations for various types of loads. The LF18CDT family of high-precision low-dropout regulators from STMicroelectronics provides efficient, reliable power conversion for a wide range of projects and systems.

Application Field

The LF18CDT family is well suited for a wide range of applications, including general low-power systems, industrial control and medical applications. It features a low-voltage dropout and high output current, making it ideal for providing power to remote sensors, actuators, and other electronics. Additionally, this family offers increase current limit and thermal performance, an input voltage range of 2.5V – 6V, and a 500mV dropout voltage. This makes it a great choice for portable electronics and other handheld power solutions.

The devices in the LF18CDT family are designed to meet stringent requirements for noise, ripple, and output voltage accuracy, ensuring high performance and robustness. They also feature short circuit protection, as well as over-voltage protection, to prevent costly repairs and downtime.

Working Principle

The LF18CDT family operates by employing a principal structure known as a “low-dropout linear regulator.” This type of regulator functions by controlling the output voltage of a circuit by monitoring its input voltage and then supplying the appropriate current.

When the input voltage drops, the LF18CDT regulator will dynamically control the output voltage to maintain its predetermined level, down to a voltage difference of 500mV. This is achieved by using an internal reference voltage level set by an external resistor to the ground.

The output voltage of the regulator is regulated by the current flowing through the device, which is based on the ratio of the external resistor and output current. By varying this ratio, the output voltage can be set to any value between 1.1V and 5V.

In addition to providing precise output voltage regulation, the LF18CDT family also offers a number of features designed to ensure stable power delivery for applications where robust performance is critical. These features include thermal shutoff protection, output current and over-voltage protection, as well as short-circuit protection.

The LF18CDT family of high-precision, low-dropout regulators from STMicroelectronics is well suited for a wide range of applications, delivering efficient and reliable power conversion. With its low-voltage dropout and high output current, it is an ideal choice for providing power to remote sensors and actuators, or any other application requiring accurate voltage regulation and current limitation. Additionally, it offers excellent thermal performance, ensuring increased reliability and robustness in critical applications.

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