LT1573CS8-3.3

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LT1573CS8-3.3 Application Field and Working Principle

The LT1573CS8-3.3 is a linear regulator controller specifically designed for applications that require high precision and low noise with minimal external components. With features such as low noise operation, wide input voltage range, and low dropout, this device provides a single-IC solution that satisfies the most demanding power requirements. The LT1573CS8-3.3 belongs to the subcategory of Power Management IC (PMIC), Voltage Regulators and Linear Regulator Controllers.

Application Field

The LT1573CS8-3.3 is ideally suited for powering most digital integrated circuits, memory, and sensor applications that require high accuracy and low noise supplies. Its wide input voltage range of 2.6V to 24V can handle a variety of input sources, while the high output impedance and regulated voltage output minimize the effects of line and load transients. The LT1573CS8-3.3 can also be used to power LED displays, batteries, and other low power systems. The low noise performance and low quiescent current make it a perfect fit for these applications.

Features

The LT1573CS8-3.3 features high accuracy output voltage regulation, low noise, and low quiescent current operation. It has a wide input voltage range from 2.6V to 24V and can handle a variety of input sources, including Unregulated and Buck/Boost converters. The output impedance is low, making it suitable for providing a regulated voltage at the end of long, noisy lines. Moreover, the device has an adjustable soft-start feature for handling high inrush current. The output voltage range can be set using external resistors, and the device can be programmed for improved transient response using an additional resistor.

Other features of the LT1573CS8-3.3 include thermal shutdown protection, a power saving mode, low dropout voltage, and fast response time. Additionally, the device has a built-in delay between powering up the output and regulating it, which is adjustable using the delay pin. This can improve the system\'s performance in applications where quick startup is important.

Working Principle

The LT1573CS8-3.3 is based on an on/off control principle, where the power is cycled on and off for regulating the output voltage. It features an internal error amplifier that monitors the output voltage and compares it to the external programmed reference voltage. If the output voltage deviates from the reference, the error amplifier adjusts the power to the output stage so that the output voltage is regulated. It also features a current limiting circuit for protecting the device from overcurrent conditions.

The LT1573CS8-3.3 has an adjustable soft-start feature, which helps reduce current surges from the input voltage during startup. Additionally, the device can be programmed for improved transient response using an additional resistor. It also has a delay between powering up the output and regulating it, which can improve the system\'s performance in applications where quick startup is important.

Conclusion

The LT1573CS8-3.3 is a linear regulator controller specifically designed for applications that require high precision, low noise, and minimal external components. Its wide input voltage range and low dropout voltage make it suitable for a variety of applications. Moreover, the device has adjustable soft-start feature, current limiting circuit, and adjustable delay for improved system performance. The LT1573CS8-3.3 is a great choice for powering digital integrated circuits, memory, and sensor applications that require high accuracy and low noise supplies.

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