MAX8640YELT12+T

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MAX8640YELT12+T Application Field and Working Principle

The MAX8640YELT12+T is a high-efficiency, small form factor DC-DC switching regulator specifically designed to address the needs of mobile and handheld designs powered by single-cell Li-Ion batteries. It offers robust features to help reduce size, maximize battery efficiency and enhance system performance.

Application Field

The MAX8640YELT12+T is designed for use in mobile, portable and handheld systems including mobile phones, PDAs, smartphones, digital cameras and MP3 players. This device can be used as a DC-DC power supply to provide a regulated output voltage from a single Li-Ion battery. It provides a high efficiency, small form factor and fast transient response which makes it ideal for the most demanding application requirements.

Working Principle

The MAX8640YELT12+T utilizes a synchronous buck regulator circuit to efficiently convert the unregulated input voltage to a regulated output voltage. The main elements of the circuit are a pair of power switches connected to an inductor and a capacitor. The power switches are controlled by a pulse-width modulation (PWM) output from the regulator’s internal control circuit. By varying the pulse width of the PWM output, the ratio of on-time to off-time can be adjusted, which changes the output voltage. The inductor stores energy during the on-time and releases the energy during the off-time while the capacitor filters any noise created by the switching action. The result is a highly regulated output voltage that is isolated from the input voltage.

The MAX8640YELT12+T also provides a wide range of output voltage options, up to 3.6V with 0.075V increments. The device can be also be programmed for an output current limit and a soft-start feature for inrush current control. In addition, it provides robust thermal protection and current monitoring capability, allowing the device to shut down in the event of an overload or thermal overload condition.

Conclusion

Overall, the MAX8640YELT12+T is a highly efficient, small form factor DC-DC switching regulator specifically designed to address the needs of mobile and handheld designs powered by single-cell Li-Ion batteries. It provides a wide range of output voltage options, as well as robust features such as current limiting and thermal protection, making it an ideal choice for mobile and handheld applications.

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