NCP585DSN28T1G

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The NCP585DSN28T1G is a member of the Linear Voltage Regulators found within ON Semiconductor\'s PMIC (Power Management Integrated Circuit) portfolio. Developed to provide an efficient and cost effective solution to providing precision power regulation of an alternating current (AC) to a direct current (DC), the NCP585DSN28T1G has found a place in a number of applications from cellular phones to computer displays to LED light bulbs.

The NCP585DSN28T1G is a linear, low-drop-out voltage regulator designed to convert a high-level AC supply into a perfectly regulated direct-current (DC) voltage. It relies on linear, transistor based, architectures and the use of a reference voltage to measure and proportion the desired output. The NCP585DSN28T1G is equipped with ESD protection, is capable of operating from both input and output voltages of up to 27V and can support an output current of up to 1.2A. As an added value, additional features include soft start, output over-voltage protection, line voltage dispersion detection, load short-circuit protection, undervoltage lockout, thermal shutdown protection and an exceptionally low quiescent current of 6µA.

In order to implement the NCP585DSN28T1G into a specific design consideration must be taken into account related to the current sourcing and sinking of the device, its power requirements, and its external electrical load requirements. First, the user must decide when the linear regulator is to take over the power management responsibilities and what voltage must be supplied for the desired operation. The input to the device must also be determined and then determined if the input source can source or sink the required current as well as provide the regulation required. Next, the device must be provided with a high side low dropout voltage reference source, that is capable of supplying the device with the needed current to bring the output voltage to the desired level. Once this is accomplished the device must be connected to the device it is supplying.

Finally, the user must make sure the device can dissipate the power that is generated by the circuit it\'s supplying. To do this the user must calculate the load (L) placed on the device and its maximum output voltage (Vout) by plugging the values into the following equation: P = (Vout x L) + (Vout/Eff. x Iq). This equation not only determines the total output power (P) the device can handle, but also the power dissipation or power the device can handle utilizing the quiescent current (Iq) of the device and the efficiency (Eff.) of the conversion.

The NCP585DSN28T1G is an example of a linear regulator featuring PMIC technology. It is designed to support a wide range of applications from cellular phones to computer displays, to LED light bulbs and offers engineers specialized protection mechanisms designed to ensure a safe and accurate power supply for the device it is servicing. With the ability to offer up to 1.2A of output current, the NCP585DSN28T1G is the perfect solution for applications requiring a low-drop-out, linear voltage regulator solution.

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