MAX828EUK-T

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The MAX828EUK-T is a member of the MAX828 family of step-down DC-DC switching regulators (also known as switch-mode power supplies or DC-DC converters). It is a monolithic integrated circuit which requires few external components, making it ideal for cost-sensitive, space-constrained applications. As with other switching regulators, the MAX828EUK-T is designed to convert a higher voltage (typically around 5V) to a lower voltage (typically in the range of 1.8V to 5V). This allows it to be used as a low-loss and highly efficient replacement for linear voltage regulators, which have much higher power dissipation. The MAX828EUK-T is designed to be used as a post-regulator in applications such as wireless handsets, notebook computers, cellular phones, and personal digital assistants (PDAs).

The MAX828EUK-T has an operating range of 1.8V to 12V, which allows it to be used with a wide range of input voltages. It also features integrated overcurrent and thermal-shutdown protection, which prevents the device from damage due to overloads. In addition, the device includes a dropout voltage of 0.4V and an adjustable switching frequency (ranging from 0.75MHz to 2MHz). This allows it to be used in high-efficiency circuits with fast transient response times.

The basic operating principle of a MAX828EUK-T is to control the flow of current through an inductor to produce a step-down voltage. This is done by switching the current through a series of MOSFET switches, allowing the input voltage to be dropped as needed. This is accomplished by connecting the source of the MOSFET to the input voltage, and the drain to the inductor. As the source-drain voltage increases, the current in the inductor also increases, resulting in an increasing magnetic field. This field induces a voltage in the output of the inductor, which can then be used to power the load. The MAX828EUK-T also includes an in-built current-sense and error-amplifier circuit which continuously monitors the current and adjusts the MOSFET switch on times to maintain a constant output voltage.

To ensure smooth and clean operation, the MAX828EUK-T features a soft start feature and a pulse-skipping mechanism. The soft start feature reduces start-up current surges by gradually increasing the switch on times, while the pulse skipping mechanism reduces switching losses when the output current is low. The MAX828EUK-T also features an integrated low-dropout voltage of 0.4V, allowing the circuit to maintain a constant output voltage even when the input voltage is close to the output voltage setting. This also allows the device to be used in higher efficiency applications such as cellular phones and PDAs, where the battery voltage may drop over time.

The MAX828EUK-T is well-suited to a range of applications, from powering low-voltage peripherals in desktop computers and servers to providing a low-voltage, high-efficiency post-regulator for power-hungry portable devices. In addition, its small size and low component count make it ideal for space-constrained applications, such as cellular phone and notebook computers. With its wide operating range, integrated safety features, and adjustable switching frequency, the MAX828EUK-T is an ideal choice for a variety of DC-DC conversion applications.

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