MAX1796EUA

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The MAX1796EUA is a highly-integrated 3MHz, step-down DC-DC switching regulator. It is designed to reduce the number of external components typically needed in mobile DC-DC applications. It is capable of delivering up to 4A of current at up to 95% efficiency. It is ideal for handheld and notebook computers, as well as other portable device applications.

The MAX1796EUA DC-DC switching regulator operates from a single 2.3V to 5.5V input source. Its integrated step-down switching regulator can output 1.2V to 5V with output currents up to 4A. Its programmable, 2-MHz/3-MHz fixed-frequency architecture ensures low-noise operation and optimizes small, low-cost inductor performance.

The MAX1796EUA features an integrated power N-FET that, along with the control circuitry, allows implementation of a wide-range of fixed-frequency PWM converters. The N-FET enables extremely fast, high-performance current protection without additional external components. Additionally, the N-FET allows the MAX1796EUA to achieve very high power conversion efficiencies.

The MAX1796EUA provides a comprehensive range of protection features, including power-good indication, undervoltage and overvoltage monitoring, short-circuit protection, thermal shutdown, and output current foldback. The MAX1796EUA also provides external synchronization to reduce input and output noise.

Overall, the MAX1796EUA is an ideal solution for portable applications in need of a highly efficient DC-DC switching regulator with integrated power N-FET and an extensive range of protection features. The MAX1796EUA is capable of delivering up to 4A of current with up to 90% efficiency, making it suitable for a variety of mobile applications.

The principle of operation for the MAX1796EUA is that of a typical DC-DC step-down regulator, which consists of an inductor, a rectifying diode, a PWM controller and a pass transistor. The MAX1796EUA uses an integrated low-RDS N-FET to implement the pass transistor, eliminating the need for an external power transistor. The internal PWM controller regulates the output voltage by varying the duty cycle of the switching pulses sent to the low-RDS N-FET.

The MAX1796EUA\'s internal PWM controller is designed to operate in either 2 MHz or 3 MHz fixed-frequency mode. This allows the use of a small, low-cost inductor, making it easy to optimize the size of an efficient, low-noise DC-DC converter with the MAX1796EUA. The MAX1796EUA also features a host of protection features, such as power- good indication, undervoltage and overvoltage monitoring, short-circuit protection, thermal shutdown, and output current foldback.

The MAX1796EUA has a wide variety of applications, including mobile phones, digital cameras, PDAs, MP3 players, portable gaming devices, and portable medical devices. Its high efficiency, low noise, and integrated power N-FET make it an attractive choice for many mobile and battery-powered applications.

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