UCC2803D

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UCC2803D Application Field and Working Principle

UCC2803D is a member of the Texas Instruments UCC280XX family which is a series of high performance, low quiescent current, low voltage, low noise, low dropout (LDO) linear voltage regulator. This device\'s application field takes into the Power Management and Integrated Circuit (PMIC) voltage regulators and particularly within the DC-DC switching controller category.

The UCC2803D device is intended for use in a wide variety of portable devices, from computer and communications applications to audio and automotive applications. The main purpose of the device is to provide a regulated output voltage from an input voltage of up to 30 Volts. The device consists of a power stage, a linear regulator, and a reference. The power stage includes an internal power MOSFET pass transistor with a maximum continuous drain current of 2.3 A. The power MOSFET is operated in the linear mode and receives feedback through the Quiescent Current (Q) feedback pin. In the Q feedback mode, the power stage can be operated with lower gate-source voltage without additional components.

The UCC2803D linear regulator features an adjustable output voltage range of 0.375 volts to 28 volts and output voltage accuracy of ±1.2%. The Reference pin sets the output voltage, and the output voltage can be adjusted from 0.375 volts to 0.52 volts with external resistor dividers. Current limit protection is integrated for short circuit events.

In addition to its linear regulator, the UCC2803D also features a power Good output signal which is generated during normal operation, a power Fail input signal which is activated when the output voltage is outside the acceptable voltage range, and an active low Shutdown input to enable or disable its operation.

The UCC2803D device also provides various features such as adjustable current limit and soft start, adjustable output voltage slew rate, over temperature and reverse current limit protection, and current consumption monitoring. The device is also RoHS compliant and packaged in a 4x3mm QFN package, making it suitable for a wide range of applications.

In conclusion, the UCC2803D is ideal for meeting the requirements for a high performance, low quiescent current, low voltage, low noise, low dropout linear voltage regulator. This regulator can be used in a wide range of applications, from computer and communications to audio and automotive purposes.

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