LT3090HMSE#PBF

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LT3090HMSE#PBF Application Field and Working Principle

The LT3090HMSE#PBF is a high performance, low IQ, low dropout (LDO) linear regulator from Linear Technology. It has very low noise, very low quiescent current, and high PSRR, making it an ideal solution for various applications. It is a adjustable low noise LDO, making it suitable for powering sensitive analog circuits such as RF receivers, amplifiers, and ADCs. In addition, it can be used in applications that require precision voltage regulation or wide-temperature stability.

The LT3090HMSE#PBF is a high-performance, low-Iq, low-dropout (LDO) linear regulator. It is ideal for low voltage applications, including as an input regulator for microcontroller systems powered by 3V to 5V or DC/DC converter outputs. It can deliver up to 500mA of continuous current at nearly any output voltage from 2.5V to 6.5V, and it has a minimum dropout of 50mV, making it suitable for use in small, power-constrained applications.

The LT3090HMSE#PBF features a wide operating temperature range of -40°C to 125°C, making it ideal for applications such as automotive and industrial. It also has a wide input voltage range of 2.5V to 8.5V with a minimum dropout voltage of 0.01V, and a quiescent current of 10µA (typical). In addition, the LT3090HMSE#PBF offers excellent PSRR of –77dB at 1kHz.

The LT3090HMSE#PBF has the ability to provide excellent line transient response, making it an ideal choice for applications that require voltage regulation with low output and input current noise. It also has a very low voltage variation and can provide excellent load regulation over a wide load range, making it an ideal choice for a variety of low-voltage applications.

The internal circuit of the LT3090HMSE#PBF consists of a voltage reference, error amplifier, pass transistor, and current limit circuitry. The output voltage is set by the voltage reference which is connected to the adjustment pin. The voltage reference sets the output voltage and the error amplifier will attempt to maintain this voltage. The error amplifier receives a feedback signal from the output of the regulator and if the output voltage is below the set level, the error amplifier will increase the voltage on the base of the pass transistor, increasing the output current.

The current limit circuitry will also attempt to maintain the current to a set level. If the output current reaches the set level, the current limit circuitry will shut off the current flow and lower the output voltage of the regulator, limiting the output current from exceeding the specified level. This provides additional protection of the LT3090HMSE#PBF against overcurrent and overvoltage conditions.

The LT3090HMSE#PBF is a versatile, low-Iq, low-dropout linear regulator designed for applications that require precision voltage regulation or wide-temperature stability. It is suitable for a wide variety of applications, including powering sensitive analog circuits, input regulation for microcontroller systems, and providing very low noise output voltages. It has very low noise, low quiescent current, and a high PSRR, making it suitable for a wide range of low voltage applications.

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