LP3874ESX-ADJ/NOPB Integrated Circuits (ICs)

Current - Output:	800mA
Base Part Number:	LP3874
Supplier Device Package:	DDPAK/TO-263-5
Package / Case:	TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	Enable
PSRR:	73dB ~ 57dB (120Hz)
Current - Supply (Max):	15mA
Current - Quiescent (Iq):	9mA
Series:	--
Voltage Dropout (Max):	0.35V @ 800mA
Voltage - Output (Max):	6.6V
Voltage - Output (Min/Fixed):	1.2V
Voltage - Input (Max):	7V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to LP3874ESX-ADJ/NOPB

LP3874ESX-ADJ/NOPB is a series of precision, low dropout linear voltage regulators designed to operate over a wide range of input and output voltages. The NOPB version is an adjustable, low noise, low power voltage regulator providing high output accuracy, power efficiency and high switching frequency. The adjustable version is designed to accurately regulate an output voltage with one external resistor. It provides a small footprint size and low power dissipation in compact packages.

Application Field of LP3874ESX-ADJ/NOPB

The LP3874ESX-ADJ/NOPB can be used in a variety of applications where linear voltage regulation is desired. These include systems that require low noise operation such as audio amplifiers, output stage power supplies, cellular phones and other battery-powered devices. The adjustable version can also be used in portable devices such as laptop computers and digital music players.

Features of LP3874ESX-ADJ/NOPB

The LP3874ESX-ADJ/NOPB offers several features that make it an attractive choice for voltage regulation. First, it has a low dropout voltage of 200mV, which allows it to operate with a wide range of input and output voltages. It also offers low noise performance with a noise level of 3 μVrms. Additionally, the device has a maximum output current of 0.4A and a maximum output voltage of 30V. The switching frequency of the device can be adjusted from 500 kHz to 2MHz and the ripple rejection is optimized for noise sensitivity application. The adjustable device is also provided with a trimmable output voltage range of 1.2V to 32V, allowing it to be used in a wider range of applications.

Working Principle of LP3874ESX-ADJ/NOPB

The basic operation of the LP3874ESX-ADJ/NOPB is simple. It contains an internal PMOS pass transistor between the input and output pins with the output voltage set by a single resistor. The LP3874ESX-ADJ/NOPB is designed to operate with a wide range of input and output voltages. When the input voltage is higher than the output voltage, the pass transistor is switched on and the output voltage is regulated by the resistor. If the input voltage is lower than the output voltage, the pass transistor is switched off, allowing current to flow from the output to the input. The feedback loop created by this operation ensures that the output voltage is regulated at the desired level.

Conclusion

The LP3874ESX-ADJ/NOPB is an adjustable low noise, low dropout linear voltage regulator that offers a high level of accuracy, power efficiency, and switching frequency. It can be used in a variety of applications requiring low noise operation, such as audio amplifiers, digital music players and output stage power supplies. The adjustable version provides a high degree of output voltage customization, allowing it to be used in a wider range of applications. The LP3874ESX-ADJ/NOPB offers a simple and reliable solution to voltage regulation, allowing designers to achieve high performance and improved system reliability.

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