MAX1801EKA+T

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PMIC - Voltage Regulators - Special Purpose

Special purpose voltage regulators are one of the most important components of a power management system. The MAX1801EKA+T is a high-efficiency, single-channel, positive-output, voltage regulator designed for portable applications. It delivers up to 1.1A output power over an adjustable output voltage range of 0.6V to 7V. The superior efficiency is achieved through the use of an integrated power FET and an external inductor.

Application Field of MAX1801EKA+T

The MAX1801EKA+T is specifically designed for use in portable and battery-powered applications, such as mobile phones, PDAs and digital cameras. It offers high reliability and robustness, making it ideal for use in an ever-changing and discerning mobile market.

The device is suitable for use with battery-powered systems due to its adjustable input, output, and standoff voltages. Its wide input voltage range, from 2V to 6.5V, allows for use with a variety of battery technologies, such as Lithium-Ion, Nickel Metal-Hydride, and Lead Acid. Meanwhile, its adjustable output voltage allows the device to be tailored to the exact needs of the application at hand. The MAX1801EKA+T also features excellent line and load regulation and fast transient response, making it well-suited for multi-rail applications.

Working Principle of MAX1801EKA+T

The MAX1801EKA+T works by regulating the output voltage based on a feedback loop. Input voltage is fed into a high-efficiency switch-mode converter, with the output voltage being regulated by an error amplifier. This error amplifier compares the output voltage to a reference voltage, then applies appropriate gains to calibrate the voltage difference. The output voltage is then centered around the feedback level, creating a closed-loop control system.

The switch-mode converter is a Pulse-Width Modulated (PWM) converter, which boosts the input voltage using an inductor and rectifier. The output voltage is then regulated using pulse-by-pulse current limiting set by an external resistor. The external inductor is necessary to achieve the high efficiency of the converter. The MAX1801EKA+T features an integrated power FET, which reduces the power losses associated with the switch-mode converter.

Another important feature of the MAX1801EKA+T is its adjustable output voltage. An external resistor is used to adjust the maximum output voltage, allowing for adjustability across a range of 0.6V to 7V. The adjustable output voltage ensures that the device can be tailored to the exact requirements of the application at hand. The adjustable output voltage also ensures efficient power management and helps reduce cost.

Conclusion

The MAX1801EKA+T is an efficient, single-channel, positive-output, voltage regulator specifically designed for use in portable and battery-powered applications. Its wide input voltage range and adjustable output voltage enable the device to be tailored to the exact needs of the application at hand. The MAX1801EKA+T features a high-efficiency switch-mode converter, an integrated power FET, and an external inductor, allowing it to be used in a variety of battery technologies. This device offers high reliability and robustness, making it ideal for use in an ever-changing and discerning mobile market.

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