STMicroelectronics LD3980PU18R

STMicroelectronics Part Number LD3980PU18R（PMIC - Voltage Regulators - Linear）, developed and manufactured by STMicroelectronics, distributed globally by Jinftry. We distribute various electronic components from world-renowned brands and provide one-stop services, making us a trusted global electronic component distributor.

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Introducing the STMicroelectronics LD3980PU18R, a highly efficient and versatile low-dropout voltage regulator designed to meet the demanding requirements of various electronic applications. With its exceptional performance and advanced features, this voltage regulator is set to revolutionize the power management landscape. The LD3980PU18R boasts an ultra-low dropout voltage of only 180mV at 300mA, ensuring stable and reliable power supply even in the most demanding conditions. Its wide input voltage range of 2.5V to 16V makes it suitable for a wide range of applications, from battery-powered devices to industrial automation systems. One of the standout features of the LD3980PU18R is its excellent load and line regulation, ensuring consistent output voltage regardless of load variations or input voltage fluctuations. This makes it an ideal choice for applications that require precise and stable voltage levels, such as audio amplifiers, data acquisition systems, and precision instruments. Furthermore, the LD3980PU18R incorporates thermal shutdown and current limit protection mechanisms, safeguarding the device and the connected circuitry from potential damage due to excessive heat or overcurrent conditions. With its compact size and easy-to-use design, the LD3980PU18R is suitable for a wide range of applications, including portable consumer electronics, automotive systems, and industrial control systems. Its exceptional performance, reliability, and versatility make it the go-to choice for engineers and designers seeking a high-quality voltage regulator solution. In summary, the STMicroelectronics LD3980PU18R is a game-changing voltage regulator that combines exceptional performance, advanced features, and wide application compatibility. Experience the power of precise and reliable voltage regulation with the LD3980PU18R.

Voltage Regulators-Linear is an electronic device used to convert an unstable DC voltage into a stable DC voltage. It regulates the voltage through an active component (such as a transistor or field effect tube) and a feedback network to ensure that the output voltage remains constant within a certain range. Linear regulators usually operate under low input voltage changes and load changes, and are able to provide a very clean and smooth output voltage.

Voltage Regulators-Linear has a wide range of applications, covering almost all electronic devices requiring a stable DC power supply. In the field of consumer electronics, linear voltage regulators are widely used in mobile phones, tablets, laptops and other portable devices to provide stable voltage support for core components such as processors, memory and display screens. In the field of industrial automation and instrumentation, linear voltage regulators are often used in precision measuring instruments, sensor signal processing and other occasions because of their low noise and high precision characteristics. In addition, linear regulators also play an indispensable role in areas such as medical equipment, aerospace, and automotive electronics, where the quality of the power supply is extremely high. For example, in medical equipment, linear regulators ensure the power stability of devices such as pacemakers and monitors, ensuring the safety of patients.

• 1. What is a linear regulator?

  A linear regulator is an electronic device that is primarily used to maintain a specified output voltage stable when the input voltage or load conditions change. It is an important component in electronics that acts as a buffer to protect the components of the circuit from damage. A linear regulator works by using an active device (such as a BJT or MOSFET) controlled by a high-gain amplifier, using the variable conductivity of the active pass device to maintain the output voltage. This regulator acts as a voltage divider to produce a regulated output voltage, where a linear element (such as a resistive load) is used to regulate the output voltage. The transistor stays in its active region of operation during voltage regulation. To maintain a constant output voltage, the internal resistance can be varied, providing a variable resistance by using a transistor controlled by the amplifier feedback loop.
  A linear regulator is also called a buck converter, where the output voltage is always

• 2. What are the disadvantages of linear regulators?

  The disadvantage of linear regulators is that they are not efficient and can only be used in voltage reduction applications. The efficiency of a linear regulator depends on the ratio of output voltage to input voltage: turbidity = Vo: Vi. For example, for ordinary linear regulators, when the input voltage is 5V and the output voltage is 2.5V, the efficiency is only 50%. For ordinary linear regulators, about 50% of the electrical energy is converted into "heat" and lost, which is also the main reason why ordinary linear regulators are prone to heat when working. For LDO, due to its low voltage difference, the efficiency is much higher. For example, when the input voltage is 3.3V and the output voltage is 2.5V, its efficiency can reach 76%. Therefore, in LCD color TVs, in order to improve the utilization rate of electrical energy, ordinary linear regulators are used less, while LDOs are used more.

• 3. What are the three types of voltage regulator?

  The three types of voltage regulators include the contact voltage regulator, the transistor regulator and the integrated circuit regulator.
  Contact voltage regulator: This is the type of voltage regulator used earlier. Its working principle is based on the vibration of the contact, but there is mechanical inertia and electromagnetic inertia, resulting in low voltage adjustment accuracy. Large, poor reliability, and short life, so it has been eliminated.
  Crystal tube regulator: With the development of semiconductor technology, the transistor regulator becomes the mainstream. It uses a triode for voltage adjustment. Compared with the contact -type voltage regulator, the advantages of the transistor regulator is that the response speed, high efficiency, small volume, light weight, and not easily affected by external magnetic fields are widely used.
  Integrated circuit regulator: Integrated circuit regulator is a new type of voltage regulator developed in recent years. It integrates mult