MAX14690AEWX+T

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MAX14690AEWX+T is a single-channel, low-voltage, high-current, continuous conduction mode (CCM) pulse-width modulator (PWM) controller designed to provide extremely small solutions while minimizing external components. This power management IC (PMIC) focuses on specialized applications, providing precision control of power conversion and voltage regulation.

What is MAX14690AEWX+T

The MAX14690AEWX+T PMIC is a high-performance PWM controller featuring a small footprint and low-voltage operating range. It supports both step-up and step-down converter topologies with an adjustable output voltage range of 1V to 10V. Its output current can be adjusted with a single external sense resistor.

The device is based on an Advanced Adaptive On-Time (AAT) control architecture, which allows for fast and accurate output regulation while also ensuring a smooth transient response. Further, it uses a discrete error-amplifier loop to accurately regulate the output voltage, making it suitable for a wide range of applications such as medical, industrial, and communications.

With its high-current capability, the device allows for simultaneous powering of multiple loads. It also supports bi-directional current flow, making it suitable for applications such as AC/DC and DC/DC applications.

Applications

The MAX14690AEWX+T PMIC offers an extremely small solution for a wide range of applications, including:

• AC/DC and DC/DC conversion
• High current power supplies
• High efficiency Adaptive On-Time (AOT) based switching applications
• Point-of-Load (POL) high-current regulators for distributed power applications
• Low voltage, high current step-down and step-up converters
• LED drivers
• Medical and industrial power systems

Working Principle

The MAX14690AEWX+T PMIC uses a method of power conversion called pulse-width modulation, or PWM. It works by using a high-frequency square wave, or Pulse Width Modulation (PWM) signal, to control the application\'s power by switching it on and off rapidly.

The PWM control signal is generated by the IC and is used to control the application\'s output power. The signal is the result of comparing two input signals: the reference voltage, which is the desired power budget; and the feedback voltage, which is the actual power budget.

A feedback loop is used to adjust the error between the two signals in order to ensure that the desired output is provided. The controller will adjust its performance based on the feedback voltage to ensure the maximum efficiency in power regulation.

The MAX14690AEWX+T utilizes its Advanced Adaptive On-Time (AOT) control architecture to ensure dynamic operation and maximum efficiency in current-mode PWM control. The AOT technique adjusts the on-time of each switching cycle based on the output power demand; this maximizes efficiency by using a smaller inductor than a traditional PWM approach. This dynamic on-time also enables fast transient response.

Conclusion

The MAX14690AEWX+T PMIC is a high-performance, low-voltage, high-current, continuous conduction mode (CCM) pulse-width modulator (PWM) controller designed for specialized applications. It uses an Advanced Adaptive On-Time (AOT) control architecture for maximum efficiency in current-mode PWM control, allowing for fast and accurate output regulation with a smooth transient response.

The device supports both step-up and step-down converter topologies and can be used in a variety of applications including AC/DC and DC/DC conversion, LED drivers, high-current power supplies, medical and industrial power systems, and low voltage, high current step-down and step-up converters.

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