SI91871DMP-28-E3

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Linear voltage regulators, also known as line drivers, are widely used to provide precise regulation of output voltage. The SI91871DMP-28-E3 is a high performance, fully programmable, linear voltage regulator IC with automatic and manual shutdown control. It is designed for a wide range of applications, including DC and AC input systems. It has the capability to provide precision output and wide input voltage range.

The SI91871DMP-28-E3 is a low dropout, three-terminal, adjustable voltage regulator that can provide up to 2A of output current. It features a wide input voltage range of 8.0V to 25.5V and an adjustable output voltage range of 0.2V to 20.5V. The device is equipped with an on/off switch for manual shutdown control and an Automatic Shutdown Control (ASDC) for protection against overcurrent and short circuit conditions.

The SI91871DMP-28-E3 has a wide range of application and is ideal for powering digital devices and control systems. The device can also be used in power supplies, battery charging, instrumentation, and automotive systems. Additionally, it is suitable for audio applications such as amplifiers, noise suppressors, and line receivers.

The SI91871DMP-28-E3 features very low voltage ripple, no load dropout voltage, and low quiescent current. It also offers reliable, precise regulation, low power consumption, and fast transient response. The device is protected against thermal overload, noise and interference, and is highly accurate over its operational temperature range.

The SI91871DMP-28-E3 operates on a wide input voltage range with maximum input voltage of 25.5V and temperature range of -10°C to +85°C. The device can be programmed to output between 1.25V and 20.5V, depending on its application. The output voltage accuracy is ±1.5%, with a tightly controlled tolerance of 0.05%.

Working principle of the SI91871DMP-28-E3 is based on the voltage regulation action of the regulator. This is accomplished via a feedback control loop, where the output voltage is compared to a reference voltage. The error amplifier then amplifies this difference, and the output drive stage linearizes the voltage varying output current. This current is then used to drive the output voltage closer to the reference level. The error amplifier can be configured to operate in one of two modes, either by a feedback resistor or an external driver. Depending on the configuration, the output voltage is adapted to the required value.

Overall, the SI91871DMP-28-E3 provides a low dropout linear voltage regulator with wide input voltage range, accurate voltage regulation, fast transient response, thermal protection and wide working temperature range. The device is ideal for a broad spectrum of applications, including power supplies, instrumentation, audio amplifiers, and automotive systems. It provides reliable, precise voltage regulation, low power consumption, and accurate low voltage ripple.

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