MAX16990AUBA/V+T

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The MAX16990AUBA/V+T is a digital pulse width modulated PWM-based current-mode DC-DC controller, primarily used in synchronous or regular buck converter applications. This step-down power solution is capable of high efficiency, low-noise operation and excellent transient response while providing an array of protection features. This device is designed to provide efficient, accurate, and reliable power supplies for a variety of battery-powered, space-constrained, and power-hungry applications.

Design Features

The MAX16990AUBA/V+T features a wide input voltage range (3V to 28V) and a high PWM current switching frequency (up to 4.0MHz). This power solution also features built-in safety protections, including overcurrent, branch-type and negative overvoltage protections. It also supports programmable loop compensation and voltage or current-mode control.

In addition to these design features, the MAX16990AUBA/V+T integrates an embedded die-temperature monitor and a proprietary analog/digital thermal shutdown circuit, providing an extended temperature operating range. This power solution also integrates an output-voltage tracking algorithm that allows the user to program the output voltage of the buck converter with relative ease.

Typical Application Fields

The MAX16990AUBA/V+T is well-suited for a variety of DC-DC switching control applications, including notebook PCs, consumer electronics, and automotive systems. This power IC can be used in designs that require high efficiency, power savings, fast transient response, and safety protection.

Working Principle

The MAX16990AUBA/V+T is a pulse width modulated (PWM) current-mode DC-DC controller, designed to convert a wide input voltage range into a regulated output voltage. The device implements a high-speed and precision current-mode control loop with a wide range of adjustable loop components. This control loop includes a time-discrete duty cycle control, which is used to regulate the output voltage of the converter.

The controller relies on a voltage-mode or current-mode control. In voltage-mode control, the output voltage is regulated by comparing the feedback voltage with a reference voltage. In current-mode control, the output current is regulated by comparing a sensed and sensed output current. In addition, the device offers programmable features for enhancing the performance and versatility of the converter solution.

The MAX16990AUBA/V+T features an adjustable low side driver current limit, which protects the converter and the load in case of short circuit or overload conditions. Additionally, the device provides multiple adjustable deadtime delay, soft-start, and pre-bias functions. This device is also equipped with internal adaptive offset compensation and a built-in output voltage tracking algorithm, which complete the versatile and comprehensive control loop.

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