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MAX16963SATEC/V+T Application Field and Working Principle

The MAX16963/MAX16963SATEC/V+T are high-performance DC-DC switching regulators with flexible operating modes. The device offers two independent step-down controllers, each with an internal powerstage switching FET to regulate output voltages from 0.6V to 5.5V. The device features output tracking for sequencing, power-good indicator, and one-shot pulse-skipping mode for heavy-load efficiency and light-load performance.

Application Field

The MAX16963/MAX16963SATEC/V+T device is suitable for a wide range of applications, including high-performance processors, storage, and communications equipment. It is capable of providing high-efficiency high-performance power-delivery to modern processors. This device is also ideal for power supplies with multiple high-current outputs and a wide range of operating conditions, such as multi-stage topologies, desktop, notebook, and servers, as well as embedded systems.

Working Principle

The MAX16963/MAX16963SATEC/V+T device utilizes pulse-width modulation (PWM), pulse-skipping, discontinuous conduction mode (DCM), and burst-mode operation (BMO) to minimize power consumption across light-load and heavy-load conditions. Output tracking capabilities are available to enable sequencing of multiple regulators in high current processor core applications. An internal PMOS power switch is used to regulate an output voltage from 0.6V to 5.5V. This internal power switch is controlled by an internal start-up, current source, and oscillator circuit. The operating mode is selected internally based on feedback signal, as well as external voltage divider, temperature, current-limit, and other parameters.

In PWM mode, the output voltage is regulated by regulating the duty cycle of the signal used to switch the internal power switch. In pulse-skipping mode, the output voltage is regulated by turning on and off the power switch at varying times. In continuous conduction mode (DCM), the output voltage is regulated by directly modulating the width of the pulses. In burst-mode operation (BMO), the output voltage is regulated by changing the number of pulses fired over a given period of time.

The MAX16963/MAX16963SATEC/V+T device has a wide range of protection features, including over-temperature, over-current, and over-voltage protection. The device also includes an internal soft-start circuit, reverse-current protection, and adjustable current limit. These features ensure safe and reliable operation of the device in many different operating conditions.

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