LD39020ATPU185R

LD39020ATPU185R Application Field and Working Principle

LD39020ATPU185R is a voltage regulator which is classified under PMIC (Power Management ICs) - Voltage Regulators - Linear. It typically features a low dropout linear regulator with signal and power Ground Pin, output voltage adjustment, short circuit protection and reverse voltage protection. LD39020ATPU185R is intended for applications where low voltage DC power supply with high accuracy and low quiescent current are desired.

Application Field

The applications of LD39020ATPU185R can be found in several fields as its most prominently feature is to provide low voltage output with high accuracy. Some applications that use LD39020ATPU185R include audio and video systems, automotive electronics, game consoles, electronic data bus systems and various communication systems. LD39020ATPU185R has a good track record of reliability and robustness, enabling its suitability in high reliability and harsh environmental settings.

Working Principle

In terms of its working principle, the LD39020ATPU185R generally consists of an internally compensated error amplifier, a temperature compensation circuit and an integrated P-channel MOSFET circuitry. The output voltage of the LD39020ATPU185R is typically determined by its internal reference voltage referencing the error amplifier. It is typically adjustable from 0.8V to 1.3V with a limit of ±2%.

The decision on the output voltage is then sent to the integrated P-channel MOSFET circuitry which then obtains current from the Output Enable (OE) pin. This then further reduces the output voltage by the dropout voltage which is determined by the amount of current sourced at the OE pin. From the Output Voltage (VOUTP) pin, the regulated output voltage will be sourced out of the device. Lastly, the internal current limiter will also be activated to prevent excessive current when the input voltage is at or below the output voltage.

In short, the LD39020ATPU185R is a low dropout linear voltage regulator which allows adjustable current sourcing at its output OE pin and provides the output with the necessary current limits when the input supply is at or below the load voltage level. Besides, low quiescent current and protection features such as short circuit protection and reverse voltage protection are included in the LD39020ATPU185R, making it an invaluable part of electronic circuits.