MAX5974EETE+T

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The MAX5974EETE+T is a monolithic switching regulator with integrated power MOSFET transistors that can operate as a buck, boost, and inverting converter. It offers integrated power MOSFETs, an adjustable output voltage, and comprehensive protection circuit including over current protection, over voltage protection, and over temperature protection.

This device is part of the MAX5974 family of monolithic, high-efficiency switching regulators. The MAX5974EETE+T features an adjustable output voltage, a built-in soft-start circuit, and can be used in a wide range of applications, including distributed power architecture sites, industrial systems, or embedded systems.

The MAX5974EETE+T’s power train, consisting of two integrated power MOSFETs, is designed to efficiently convert from a wide input voltage range down to an adjustable output voltage as low as 2.5V. The device combines the advantages of its power MOSFET switch and the PWM control circuitry to optimize its efficiency. With a minimum duty cycle of 0.86%, it is capable of delivering up to 2.8A of continuous output current from a 5V input.

In terms of application field, the MAX5974EETE+T can be used as an AC-DC converter with a wide range of input voltage. It can also be used in offline switching applications in communication, consumer electronics, machines and industrial automation, computer, automotive, automotive and aerospace applications. In addition to this, the device can also be used as a boost regulator in applications requiring high output voltage precision and a low input voltage.

In terms of working principle, the MAX5974EETE+T operates as a buck, boost, or inverting converter. In buck mode, the device steps down an input voltage, applying the output voltage (Vout) to the drain lead of the lower power MOSFET transistor Q1. The high side power MOSFET (Q2) is continuously driven by the internal clock signal (CRSTAL) to turn on and off at predetermined frequencies. This regulates the output voltage according to the resistance values applied to the resistor (RG) and theFeedback Voltage Divider (FVD). This ensures that the device delivers a relatively constant output voltage, regardless of the load current.

In boost mode, the device is used to step up an input voltage, applying the output voltage (Vout) to the source lead of the high power MOSFET transistor Q2. In this case, the high side power MOSFET is turned on and off at predetermined frequencies, while the low power MOSFET is turned on and off in synchronism with the high side power MOSFET. This ensures that the device maintains a constant output voltage when the load current is changing.

Finally, in the inverting mode, the device is used to convert ac-dc. In this case, the power MOSFETs are alternately turned on and off at predetermined frequencies, and the output voltage is regulated according to the feedback voltage divider and the resistor values.

To conclude, the MAX5974EETE+T is a monolithic switching regulator with integrated power MOSFET transistors that can operate as a buck, boost, and inverting converter. It is suitable for a wide range of applications, including AC-DC converters, offline switchers, communication, consumer electronics, machines and industrial automation, computer, automotive, and aerospace applications. In terms of working principle, it operates in either buck, boost, or inverting mode, depending on the form of the output voltage.

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