LT3573IMSE#PBF

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The LT3573IMSE#PBF is a power-management integrated circuit (PMIC) that falls into the family of DC/DC switching regulators. At its core, this device is a high-efficiency, synchronous step-down DC/DC converter. It comes in an MSOP-16 Package and is a 3.3V operating current regulator that features an input voltage range from 4.5V to 24V and adjustable output current range from 0.9V to 5V.

This device is well-suited for application areas such as smart phones, tablet PCs, and other battery-powered applications. It offers load current of up to 1.5A and can deliver up to 1.6A peak current. It features a low quiescent current of only 3 µA, flash-programmable soft-start, adjustable output current range and high efficiency. Additionally, the device also offers independent input and output voltage sharing, and an adjustable step-down converter in Burst Mode operation that can run at frequencies up to 2 MHz.

Working Principle: This DC/DC converter works by using a pulse width modulation (PWM) technique to achieve a stability of the output voltage. In this method, the duty cycle of the PWM signal is varied in order to produce the desired output voltage. When the PWM signal is higher than the reference voltage, the LT3573 IMSE#PBF pulls more current from the input voltage, otherwise it pulls less and the output voltage remains constant. This method facilitates the device to achieve tight tolerance regulation of the output voltage with a low ripple and low noise.

Finally, the wide input voltage range further makes it well-suited for applications such as wall plug adapters, point-of-loads converters, and other low-voltage power applications that require effective and efficient power regulation.

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