LD3985G33R

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The LD3985G33R is a low-dropout linear voltage regulator that is highly configurable and can provide the vast majority of user-selected applications. It can be used to support a range of automotive, consumer, and industrial applications. This versatile linear regulator has the ability to operate at very low dropout voltage and offers a variety of output voltage options. In addition, a wide range of packages are available that make the LD3985G33R suitable for any current or future application.

Applications

The LD3985G33R linear voltage regulator can be used in a wide range of applications including automotive, consumer, industrial, and computer systems. Some common applications of the device include:

• Card Readers
• GPS and Navigation Systems
• LCD Displays
• Microprocessor and Microcontroller Based Applications
• Memory Modules
• Power Supply Regulation
• Satellite Receivers
• USB 3.0/2.0

Working Principle

The LD3985G33R linear voltage regulator works by using an internal imbalance of the P-channel and the N-channel field-effect transistors to regulate a steady output voltage. This configuration enables the device to operate over a wide range of input and output voltages while maintaining a high level of accuracy. The P-channel transistor is connected to the output node and the N –channel transistor is connected to the input minus node.

The device also includes a high-side reference control transistor that is used to detect the input voltage level. When the input voltage level is higher than the regulated output voltage, the P-channel field-effect transistor is forced to conduct, and the N-channel field-effect transistor is forced to be off. This regulates the output voltage and maintains a steady output voltage at the regulated voltage level.

The device contains several features, each one designed to improve the efficiency of the regulator. The device features included an adjustable reference voltage, over-voltage and over-current protection, and reverse current blocking.

Conclusion

The LD3985G33R is a highly configurable low-dropout linear voltage regulator with many features, making it suitable for a wide range of applications. It is capable of maintaining a highly accurate output voltage and can operate at very low dropout voltage. Additionally, the device includes several features such as adjustable reference voltage, over-voltage and over-current protection, and reverse current blocking.

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