MAX17574ATG+T

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DC-DC switching regulator is one of the most common components for power management integrated circuit (PMIC). MAX17574ATG+T is a PMIC voltage regulator featuring a high-performance step-down DC-DC converter. In this article, the application field and working principle of the MAX17574ATG+T will be discussed.

Application Field

The MAX17574ATG+T provides a versatile and cost-effective solution for low-power embedded circuits and system on-chip applications. It has a wide input voltage range of 4.5V to 28V, output current capability of 3A, adjustable switching frequency up to 2.2MHz and adjustable output voltage down to 0.6V. With 1% reference accuracy, the MAX17574ATG+T offers fast transient response, low quiescent current and a no load standby current of 10µA. It also incorporates a 1.5A integrated synchronous N-channel MOSFET power stage and operates at an efficiency of up to 94%.

The MAX17574ATG+T is well suited for power conversion in automotive, telecom and wireless applications. It is especially beneficial for bulk power regulation and serves as an ideal solution for powering microcontrollers, FPGAs, DSPs and memory circuits. Additionally, the device has built-in undervoltage lockouts, thermal protection and over current protection for reliable operation in harsh environments.

Working Principle

The MAX17574ATG+T is a step-down conversion DC-DC regulator with synchronous rectification. It has a pulse width modulation (PWM) control loop, which operates at the adjustable switching frequency of up to 2.2MHz. The feedback loop is used to maintain a constant output voltage and the voltage regulation is enhanced by using the integrated power MOSFETs as the power switch.

To begin the switching process, two high-side MOSFETs and two low-side MOSFETs are used. The PWM control circuit initiates the switching process by turning on the high-side MOSFETs, charging the input capacitance and turning off the low-side MOSFETs. The cycle repeats itself until the output voltage is correctly regulated. The device also features an adjustable soft start, which helps reduce overshoot and allows for a smooth transition into normal operation.

The output voltage can be set with a maximum current of 3A. The MAX17574ATG+T also features a synchronous rectification technique, which improves the power efficiency of the device. The device continues to operate even when the input voltage is lower than the output voltage and it will automatically switch off the high-side MOSFets to avoid current flowing in to the power supply.

Conclusion

The MAX17574ATG+T is an ideal solution for compact and low-power embedded applications requiring high efficiency and accurate voltage regulation. It has a wide input voltage range, adjustable output voltage and adjustable switching frequency, making it suitable for various applications. Additionally, the device has various built-in protections and runs at a high efficiency of up to 94%. The MAX17574ATG+T is a great choice for powering microcontrollers, FPGAs, DSPs and memory circuits.

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