A5973ADTR

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A5973ADTR Application Field and Working Principle

A5973ADTR is a DC-DC switching regulator integrated circuit. This device is designed to generate a 3.3 V output from a 3.9 V to 16 V input voltage range. Based on the patented peak current mode control algorithm and multiple voltage regulation control, the A5973ADTR can provide excellent load and line regulation for a wide range of applications. The built-in switching frequency reduces EMI and radiated emissions, while a wide operating temperature range, up to 105°C, enables long life and reliability.

Features

• Low quiescent current: 25 μA
• 100% duty cycle to maintain output voltage
• Minimum component count
• Built-in low ripple regulator
• Automatic frequency compensation
• Maximum operating temperature: 105°C

Application

The A5973ADTR is suitable for applications such as battery-backed systems, automotive systems, industrial systems, and consumer electronics. The device\'s high efficiency and low component count makes it suitable for multiple types of applications, including data and communication, HVAC, and security systems.

Working Principle

The A5973ADTR is built on patented peak current mode control topology to provide a reliable solution. The device uses a combination of input and feedback voltage which, together with the on-chip voltage reference, forms a reference voltage that is measured against the input to regulate the output voltage. The dynamic response is determined by an internal soft-start circuit, which pulls up the soft ramp voltage to bring the output voltage up to the desired voltage. The peak current control reduces the size of the inductor without sacrificing efficiency, and has the ability to regulate at light load conditions with an output current of 15 mA or greater. Additionally, the on-chip frequency upper limit detection prevents unwanted oscillations by limiting the switching frequency.

Conclusion

The A5973ADTR is a highly integrated DC-DC switching regulator designed for the 3.3 V output voltage range. The device provides excellent load and line regulation for a wide range of applications. With built-in features and a wide operating temperature range, the A5973ADTR is ideally suited for battery-backed systems, automotive systems, industrial systems, and consumer electronics.

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