LP38843SX-0.8

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The LP38843SX-0.8 is a high-performance low-noise linear voltage regulator (PMIC) with very low supply current and low dropout voltage. It is designed to regulate the output voltage of linear voltage regulator (LT) circuits. The regulator offers excellent line and load regulation, typically 0.2% typical line and load regulation. The output voltage can be trimmed or set with external resistors. The LP38843SX-0.8 is designed to operate across a wide input voltage range, making it suitable for a variety of applications.

The LP38843SX-0.8 is ideal for applications with demanding power requirements such as handheld communications equipment, notebook computers and power adapters. It is also well suited for powering high-performance low-noise analog circuitry and single board applications. The LP38843SX-0.8 is available in both surface mount (SOT-23) and through-hole (TO-220) packages.

The LP38843SX-0.8 linear voltage regulator typically provides a low dropout voltage of only 0.8V. The maximum output current is rated at 400mA when using the LP38843SX-0.8 linear voltage regulator in its SOT-23 package and it is limited to 1A when using a through-hole package. The LP38843SX-0.8 comes in an adjustable version that can be adjusted between 1.2V and 18V and a fixed output version with a fixed output voltage of 5V. The input voltage range for the LP38843SX-0.8 is between 2.85V and 18V.

The working principle of the LP38843SX-0.8 is based on the use of a p-channel MOSFET (transistor) as the main pass element. The voltage regulator uses a bandgap voltage reference to adjust the output voltage to the desired value. An error amplifier is used to compare the reference voltage to the feedback voltage. The error amplifier output is connected to the gate of the MOSFET and is used to adjust the transistor’s gate voltage. When the output voltage deviates from the target level, the error amplifier adjusts the MOSFET gate voltage to increase or decrease its conduction, thus keeping the output voltage close to the desired level.

In addition to the p-channel MOSFET, the LP38843SX-0.8 linear voltage regulator also includes other components such as protection diodes for current limiting and thermal shutdown. The protection diodes are used to limit the output current to 400mA and prevent excessive heating in the regulator and the surrounding components due to overcurrent. The thermal shutdown feature provides protection from overheating of the device by reducing its output voltage in the event of excessive heat.

The LP38843SX-0.8 linear voltage regulator is a high-performance, low-noise power supply in a very small package. Its small size, low supply current and very low dropout voltage make it the perfect choice for portable applications or single board applications where space and power requirements are minimal. It is also an excellent choice for powering high-performance low-noise analog circuitry, providing stable voltage regulation and minimal noise.

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