LP2985-25DBVTG4

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LP2985-25DBVTG4 Application Field and Working Principle

LP2985-25DBVTG4 is a low-dropout (LDO) linear regulator that is highly reliable and efficient, and is capable of operating in a large range of power applications in the PMIC (Power Management Integrated Circuits) voltage regulators group. It is designed to maintain a steady, precise output voltage and current on a wide range of input voltages from 0.8V to 5.5V.

This linear voltage regulator has a wide range of application fields, such as mobile phones, digital cameras, smart TVs and tablets. In these devices, the LP2985-25DBVTG4 provides consistent and reliable power, and offers protection against UVLO (Under Voltage Lock Out), overcurrent and overtemperature, eliminating the requirement for securing additional protection circuits.

LP2985-25DBVTG4 Working Principles

LP2985-25DBVTG4 performs its tasks by comparing the current passing through the pass element inside the chip with a reference voltage. This pass element is a transistor, which works as an amplifier in variable gain configuration. The reference voltage, also known as the efficacy voltage, is developed within the chip itself.

When the pass element is turned on, current passes through the chip and causes the voltage on the non-inverting line to rise. This voltage is compared with the reference voltage. When the voltage reaches the reference voltage, the pass element is turned off. The current is thus held constant at the desired level, as long as the input voltage remains above the reference voltage.

LP2985-25DBVTG4 also has an enable pin that can be used to enable/disable the chip\'s output. When the enable pin is low the chip is disabled, and no output can be obtained from the chip. When the enable pin is high the chip is enabled, and it can produce the regulated output.

LP2985-25DBVTG4 Features

LP2985-25DBVTG4 has several features that increase its reliability and efficiency. It has a wide input voltage range of 0.8V to 5.5V. It also has a maximum output current of 300mA and a low dropout voltage of 0.3V at full load. Its low quiescent current of 3µA helps in improving the efficiency of the device.

LP2985-25DBVTG4 integrated guarantee a fast transient response, a low output noise, a cycle-by-cycle current limiting and an over temperature protection. This device is also drop-in compatible with most complementary NPN/PNP output linear regulators, further increasing its versatility and reliability.

This chip also offers accuracy of 0.5% over line, load and temperature, making it reliable and precise. In addition, it also has an on-chip voltage reference for improved accuracy and low voltage operation.

Conclusion

LP2985-25DBVTG4 is a highly reliable and efficient linear regulator from the PMIC voltage regulators group. It is designed to provide a steady and precise output voltage and current over a wide range of input voltages. It has an enable pin and is drop-in compatible with most other NPN/PNP output linear regulators.

LP2985-25DBVTG4 offers maximum output current of 300mA, low quiescent current of 3µA, fast reaction time and accurate output over line, load and temperature. It is widely used in the power application of mobile phones, digital cameras, smart TVs and tablets, and provides users with a reliable and efficient source of power.

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