MAX867EUA+

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The use of PMICs—integrated circuits for power management—is becoming ever more widespread. One type of PMIC is the DC-DC switching regulator, which is a key component for many power supply management systems. The Texas Instruments MAX867 is a DC-DC voltage regulator with a wide application field, from network servers to mobile phones. In this article, we’ll explain the features, application fields, and working principle of the MAX867.

Features

The MAX867EUA+ is a monolithic step-down DC-DC converter with an integrated voltage feedback loop and an adjustable switching frequency of up to 1.25MHz. It has a wide input voltage range of up to 50V, making it suitable for a variety of different applications.

The chip also includes several advanced features, such as current and voltage protection, adjustable soft start, and cycle-by-cycle current limit. It has an adjustable output voltage range of 0.8V to 5V, making it versatile enough to be used in a wide range of systems.

The MAX867EUA+ also supports a wide range of load capacitance, which is important for stability. It has an integrated shunt regulator, and its operating temperature range is -40 to 125 degrees Celsius.

Application Field

The MAX867EUA+ has a wide range of applications. Its wide input voltage range, adjustable output voltage range of 0.8~5V, high switching frequency, and integrated protection circuitry make it suitable for a number of system designs.

It can be used in notebooks, cellular phones, car navigation systems, handsets, GPSs, digital cameras, PDAs, and portable computers. It can also be used in industrial applications such as factory automation, power management at telecommunications towers, and tracking systems.

Working Principle

The MAX867EUA+ works by converting a high input voltage to a low output voltage in a very efficient manner. Its control circuit uses a voltage feedback loop to maintain the output voltage at its desired level.

The chip uses a Pulse-Width Modulation (PWM) control circuit to modulate the pulse width in order to control the output voltage. The device uses an internal voltage reference to create a feedback signal that is compared to the actual output voltage. The PWM duty cycle is then adjusted accordingly to keep the output voltage at its desired level.

Furthermore, the chip also contains a peak current-mode control stage to regulate the switching frequency. The current limit is adjusted via the internal current sense resistor.

The chip’s integrated protections, such as overcurrent, undervoltage lockout, and thermal shutdown, ensure the device’s reliability and reduce the risk of damage from an overcurrent or overheating condition.

Conclusion

The MAX867EUA+ is a powerful and reliable DC-DC switching regulator, ideal for a wide range of applications from network servers to cellular phones. It has a wide input voltage range, adjustable output voltage of 0.8~5V, high switching frequency, and integrated protection circuitry, making it a great choice for power management.

The specific data is subject to PDF, and the above content is for reference