LP3855EMPX-1.8/NOPB

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Introduction to the LP3855EMPX-1.8/NOPB

The LP3855EMPX-1.8/NOPB is a low-dropout (LDO) linear voltage regulator released by Texas Instruments. It is an adjustable voltage regulator that features extremely low quiescent current (less than 6 μA). This makes the device ideal for battery-powered systems.

It belongs to the PMIC (power management integrated circuits) category, specifically falling under the voltage regulators subcategory, and more specifically the linear type. Texas Instruments manufactures the device in an ultra-small, 8-lead, expay-dense, thin-shrink small-outline package (ESD-TVS diode protection included).

Application Fields & Working Principle

The LP3855EMPX-1.8/NOPB can be found in many applications, most of which involve battery or other low-power operations. This includes medical devices, wearables, wireless sensors, etc. It can also be used in harsh, temperature-critical environments, such as in military, aerospace, and industrial systems.

The primary application field of LP3855EMPX-1.8/NOPB is its ability to regulate power in systems with low-voltage input rail, where it can reduce the dropout voltage to just 0.3 V. This makes it suitable for applications where power savings is a priority.

The working principle of the LP3855EMPX-1.8/NOPB is as follows: it uses a N-channel MOSFET and an internal voltage reference to produce an output voltage. The MOSFET\'s gate is driven to cause the current flow from the input voltage to the output voltage, while the reference voltage ensures the output voltage remains stable. This is how the device is able to regulate power at a low dropout voltage.

Essentially, the LP3855EMPX-1.8/NOPB works like a voltage divider. An input voltage is applied to the device and the output voltage is regulated through the MOSFET. The output voltage is regulated at a fixed value, depending on the chosen reference voltage. The output voltage is adjustable, allowing the device to be set to the desired voltage output.

Key Features

The LP3855EMPX-1.8/NOPB is designed to meet the needs of low-dropout voltage applications. This device offers the following key features:

• Output voltage range from 1.8 V to 5.5 V (adjustable)
• Resistor scalable output voltage
• Maximum output current of 1 A
• Low quiescent current (less than 6 μA)
• Temperature range: -55°C to +125°C
• ESD-TVS diode protection

Final Thoughts

The LP3855EMPX-1.8/NOPB is a great solution for low-dropout voltage applications. The small size and low power consumption make it an ideal choice for systems where battery life is paramount. Additionally, its ability to regulate power at a low dropout voltage makes it well-suited for harsh and temperature-critical environments.

Whether for medical, industrial, aerospace, military or other low-power operations, the LP3855EMPX-1.8/NOPB is a great choice for voltage regulation. With its ultra-small size, low power consumption and resistance to temperature fluctuations, this device makes it possible to build low-power systems that meet the most demanding requirements.

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