National Semiconductor LP3991TL-0.8/NOPB

National Semiconductor Part Number LP3991TL-0.8/NOPB（PMIC - Voltage Regulators - Linear）, developed and manufactured by National Semiconductor, 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.

LP3991TL-0.8/NOPB is one of the part numbers distributed by Jinftry, and you can learn about its specifications/configurations, package/case, Datasheet, and other information here. Electronic components are affected by supply and demand, and prices fluctuate frequently. If you have a demand, please do not hesitate to send us an RFQ or email us immediately sales@jinftry.com Please inquire about the real-time unit price, Data Code, Lead time, payment terms, and any other information you would like to know. We will do our best to provide you with a quotation and reply as soon as possible.

Introducing the National Semiconductor LP3991TL-0.8/NOPB, a highly efficient and versatile voltage regulator designed to meet the demanding requirements of various electronic applications. With its advanced features and exceptional performance, this product is set to revolutionize the power management industry. The LP3991TL-0.8/NOPB boasts an ultra-low dropout voltage of only 80mV at 300mA, ensuring stable and reliable power supply even in the most challenging conditions. Its high accuracy output voltage of 0.8V makes it ideal for powering low voltage devices, such as microcontrollers, sensors, and other digital components. This voltage regulator also offers excellent load and line regulation, ensuring consistent voltage output regardless of changes in input voltage or load conditions. Its low quiescent current of only 30µA further enhances energy efficiency, making it an excellent choice for battery-powered applications. The LP3991TL-0.8/NOPB is designed to operate over a wide input voltage range of 2.5V to 5.5V, providing flexibility and compatibility with a wide range of power sources. Its compact size and thermal shutdown protection make it suitable for space-constrained applications, while its high PSRR (Power Supply Rejection Ratio) ensures minimal noise interference. With its exceptional features and performance, the LP3991TL-0.8/NOPB is well-suited for a variety of applications, including portable electronics, IoT devices, wearables, and battery-powered systems. Its versatility, efficiency, and reliability make it an indispensable component for any power management solution. Experience the future of power management with the National Semiconductor LP3991TL-0.8/NOPB and unlock the full potential of your electronic devices.

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 problems will linear regulators bring to the circuit?

  The problems that linear regulators bring to the circuit mainly include low efficiency and a lot of heat.
  Linear The main working principle of the voltage regulator is to control the output voltage of the transistor through a current amplifier to keep the output voltage stable. This working mode causes the linear regulator to control the regulating tube through a differential voltage when adjusting the output voltage. The control tube needs to absorb part of the input voltage, which makes the efficiency of the linear regulator relatively low. In practical applications, this means that the linear regulator will convert the difference between the input voltage and the output voltage into heat energy, causing serious heating of the device, especially when the input and output voltage difference is large, this power loss will further increase, causing the device to heat up.

• 2. When should a linear regulator be used instead of a switching regulator?

  In low-power and low-frequency application scenarios, a linear regulator should be used instead of a switching regulator.
  Linear regulator Suitable for low-power and low-frequency applications, with simple circuit structure, low noise and good stability. They control the output voltage of the transistor through a current amplifier to keep the output voltage stable. This working mode makes linear regulators perform well in low-power and low-frequency applications, although they are less efficient and generate more heat, and their application range is limited. In contrast, switching regulators use high-frequency pulse modulation technology to convert input voltage into a stable output voltage. They have the advantages of high efficiency, small size and fast response, and are suitable for high-power and high-frequency applications. Therefore, when the application requirements are not the main considerations for circuit complexity and cost, but have high requirements for the stability and

• 3. What are the alternatives to linear regulators?

  Alternatives to linear regulators include Semiconductor HT7144S, K7805-2000R3, TPS70933DBVR, CLR6212, XC6220B331MR-G, LR7550-M, SGM2054XTD10G/TR, ME6213C33M5G, RS3236-3.3YF5, KL2036-2.2V, etc. These alternatives cover different package forms (such as SOT-23, SOP8, etc.) and output voltage and current specifications to meet the needs of different applications. For example, the HT7144S is a three-terminal linear regulator, while the TPS70933DBVR is an LDO (low dropout linear regulator) with lower output voltage and current specifications. CLR6212 and XC6220B331MR-G provide higher output current capabilities and are suitable for applications that require larger current outputs. LR7550-M and SGM2054XTD10G/TR provide specific voltage and current specifications to meet the needs of specific fields. ME6213C33M5G and RS3236-3.3YF5 are regulators with specific packaging forms, suitable for space-constrained application scenarios. KL2036-2.2V is a linear regulator with a lower output voltage, su