MAX20756ETM+

Series:	*
Part Status:	Obsolete

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MAX20756ETM+ Application Field and Working Principle

The MAX20756ETM+ is an integrated, high-efficiency, boost-mode step-up power converter, designed to produce a single output of 5V up to 1.5A from a single cell Li-ion or two-cell alkaline or NiMH battery. It is particularly suited for powering digital loads in space-constraint applications such as smartphones, tablets, PDAs, or other handheld devices.

Application Field

The MAX20756ETM+ is designed for powering digital loads in space-constraint applications such as smartphones, tablets, PDAs, or other handheld devices. It eliminates the need for an LC output filter, providing a fast transient response and reducing component count. The unique foldback architecture further eliminates input current surges to reduce stress on the Li-Ion/alkaline/NiMH battery.In addition, it supports wide input voltage range from 1.5V to 5.5V, making it suitable for a wide range of applications. The regulator also has a low quiescent current of 12μA in sleep mode, making it ideal for battery-based applications.

Working Principle

The MAX20756ETM+ is a boost-mode synchronous step-up voltage regulator, with a topology similar to a buck-boost converter. It consists of two power MOSFETs: one regulates the DC input voltage, and the other is connected to the output voltage pin.The output voltage is regulated by sensing the voltage of the output voltage pin and using pulse-width modulation (PWM) to control the two power MOSFETs. As the voltage of the output pin increases, the duty cycle of the PWM is decreased, which reduces the amount of energy transferred through the power MOSFETs.The MAX20756ETM+ has a programmable switching frequency, allowing it to be optimized for specific applications. It also has an adjustable peak current limit and soft-start capability, allowing for optimized performance for a wide range of input voltages.

Conclusion

The MAX20756ETM+ is an integrated, high-efficiency, boost-mode step-up power converter designed for powering digital loads in space-constraint applications such as smartphones, tablets, PDAs, or other handheld devices. It eliminates the need for an LC output filter, provides a fast transient response, and reduces the amount of components required. The regulator also supports wide input voltage range, has low quiescent current in sleep mode, and has adjustable peak current limit and soft-start capability.

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