ACT4065ASH-T

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DC DC switching regulators are the mainstays when it comes to reliably regulating a power supply\'s output voltage and protecting downstream components from malicious applied load vectors. Switching regulators of this type come in many forms and the ACT4065ASH-T is a very capable model that manages to balance performance and cost in order to provide a reliable and economical solution for any design utilizing buck topology.

DC DC switching regulators provide a regulated voltage to downstream components for a wide range of power supplies, both commercial and consumer oriented. In the case of the ACT4065ASH-T, it is designed for a wide input voltage range of 4.5 to 28V, making it suitable to be used from many commercial, automotive, and consumer grade power sources.

From the outside, the ACT4065ASH-T looks fairly typical for a buck regulator, with a 14-pin SOP-14 package and an externally adjustable current-sense resistor that allows for optimizing the transient response as well as the maximum current limit. On the inside, the dollar to performance ratio is quite good, with a 0.8mV ripple, 1.5A output current, and 95% efficiency.

The working principle of a DC DC switching regulator, such as the ACT4065ASH-T, is based on the conversion of one voltage level to another. At the heart of the ACT4065ASH-T is its integrated power switch and control logic that manipulates the internal switches to convert the input voltage to its output voltage, which is typically lower than the input voltage. The power switch is activated by the control logic in successive pulses, in order to create an average output voltage that is adjustable through external resistors and dividers.

The ACT4065ASH-T also features a wide variety of protection features, such as over current protection and short-circuit protection, as well as a unique auto-recovery feature that allows for a slow startup of the converter in the event of an over current or over temperature event occurring. This feature makes the ACT4065ASH-T well suited for dealing with very high inrush currents associated with motor drive applications.

In order to balance the performance and cost of the regulator, the ACT4065ASH-T also features a wide range of integrated circuitry that allows for the smooth regulation of the output voltage in the presence of large load transients as well as offering a wide dynamic range. This allows the ACT4065ASH-T to maintain highly accurate output voltages in the face of varying load conditions.

Overall, the ACT4065ASH-T is a solid choice for applications where a reliable and economical solution is needed for regulating power supplies. With its wide input voltage range, efficient operation, protection features and integrated circuitry, it is well suited for a variety of designs utilizing buck topology.

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