MAX764EPA

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MAX764EPA Application Field and Working Principle

MAX764EPA is a high efficiency DC-DC step-down switching regulator from MAXIM, specially designed for portable electronic applications. It can convert up to 1A of output current from an input of 3V to 36V. It can provide a regulated output voltage of 1.2V to 10V with a ±2% output voltage regulation.

The MAX764EPA is a current-mode DC-DC switching regulator, with a wide range step-down voltage of 3V to 36V. It features an adjustable output voltage, with ±2% output voltage regulation, maximum of 1A output current and a fast transient response time. The device operates at a switching frequency of 1.2MHz and features an internal power transistors and an internal compensation network, which provides a stable, synchronized clock in the presence of load transients. It also features short-circuit, open circuit and over-temperature protection as well as under-voltage lock out

MAX764EPA can be used for various applications such as 1) battery powered portable electronic devices, 2) consumer electronic adjustable power supplies, 3) battery management, 4) automotive systems, and 5) embedded power supplies.

The MAX764EPA operates using the Pulse Width Modulation (PWM) method of regulation. PWM converts an input voltage to a square wave with a pulse width that is proportional to the input voltage, thus modulating the current. This control method switches the output voltage of the device by switching a duty cycle that is determined by the input voltage and the external component. During the duty cycle, an inductor is connected to an input and the output voltage is regulated. The inductor stores energy during the duty cycle and releases it to the output during the off segment, thereby providing a continuous current regulation of the output voltage.

The MAX764EPA features an on-chip clock generator, which is used to synchronize the output voltage regulation switching cycle. The on-chip clock generator has frequency synchronization capabilities, and thus it can provide efficient power conversion while maintaining converter stability under load transients. The device can also operate in Shutdown Mode, which reduces the quiescent current consumption to typically 1µA and has an over-temperature protection feature.

In summary, MAX764EPA is an efficient current-mode DC-DC step-down switching regulator, specially designed for portable electronic applications. It offers a wide input voltage range of 3V to 36V and an adjustable output voltage range of 1.2V to 10V. It offers excellent output voltage regulation with ±2% accuracy and a fast transient response time. It also offers various protection features and can be used for various applications such as battery powered portable electronic devices, consumer electronic adjustable power supplies, battery management, embedded power supplies and automotive systems.

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