LTC1775IGN#PBF

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The LTC1775IGN#PBF device is described as a high accuracy, low power, and low noise DC-DC controller. It incorporates a general purpose digital regulator, providing an efficient and low cost method of accurately stepping up or stepping down a voltage from one voltage supply to another. The device is part of a family of precision voltage regulators that include a variety of features such as adjustable output voltage, remote load sensing, current limit, adjustable slew rate, and thermal shutdown.

Application Field

The LTC1775IGN#PBF is a low cost, highly versatile DC-DC controller that is suitable for a variety of applications including Portable Electronics, Battery-Powered Equipment, Automotive Applications, and Industrial Supplies. It is ideal for providing a +2.5V to +15V output from an input voltage of up to +20V.

In addition, it can also be used for other applications such as high power, low noise point-of-load regulation and for controlling high current switching regulators. It is also well suited for providing a low cost solution for powering electronic systems such as microcontrollers and logic devices.

Working Principle

The LTC1775IGN#PBF device uses a proprietary, non-disruptive current sensing technique to regulate output voltage. This technique uses a loading resistor on the source of the regulator, allowing the current through this resistor to be monitored directly. This allows the digital control logic to accurately sense the output voltage, accurately adjust the control input, and provide high accuracy output regulation.

The device includes an Adjustable Programmable Reference (APR) input pin, which allows for easily configuring the output voltage and the slew rate. The device also includes a Shutdown and Enable pin which allows for complete shutoff of the output in order to extend battery life. The LTC1775IGN#PBF also includes an Over-Current Shutdown (OCSD) pin which will protect the DC-DC controller from current overloads.

Conclusion

The LTC1775IGN#PBF is a low cost, highly versatile DC-DC controller well suited for a variety of applications. It provides a +2.5V to +15V output from an input of up to +20V and features adjustable output voltage, remote load sensing, current limit, adjustable slew rate, thermal shutdown, and Over-Current Shutdown (OCSD). This makes it an ideal solution for a wide variety of applications including portable electronics, battery-powered equipment, automotive applications, and industrial suppliers.

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