LP38692MPX-2.5

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The LP38692MPX-2.5 is a low-noise linear voltage regulator specifically designed to supply precision analog circuitry with a combination of a very low noise output, a wide input voltage range, and excellent thermal stability over line, load and temperature variations. This versatile low-dropout regulator belongs to the family of PMIC (Power Management ICs) Voltage Regulators and more specifically to the Linear Voltage Regulators, making it a great fit for a wide range of applications.

Application

The LP38692MPX-2.5 voltage regulator is specifically designed for precision analog devices and circuits, where low noise and low output impedance are critical. These applications include medical, test and instrumentation, telecommunications, automotive and industrial equipment. These applications typically require high precision over line, load and temperature variations.

The LP38692MPX-2.5 is ideal for devices such as wireless communication systems, ultra-low-power sensing, low-noise conversion, battery-powered portable systems, high-precision references and other low-noise analog circuits. Due to its small package size, the LP38692MPX-2.5 is also suitable for space-constrained applications.

Features

This voltage regulator is the industry leader in providing excellent line and load regulation over line, load, and temperature variations. The device features low-noise operation of 0.5 µVrms at 100 kHz, high precision output voltage accuracy of ±0.6%, low output voltage ripple, fast start-up, low quiescent current draw from 350µA, and protection against short/long circuits.

The LP38692MPX-2.5 provides high power supply rejection ratio, which translates into high immunity to fluctuations of the input voltage and low power output impedance, resulting in low-noise operation. The low-noise operation of the LP38692MPX-2.5 is especially important for applications where the noise of the power supply would interfere with the desired signal.

The device also has adjustable voltage settings, allowing the user to vary the output voltage according to the application. In addition, the LP38692MPX-2.5 includes over-voltage protection, lead-free and RoHS compliant, and heat-dissipating packages (MSOP-8 and eDFN-8), making it suitable for space- and power-constrained applications.

Working principle and electrical characteristics

The LP38692MPX-2.5 voltage regulator is an adjustable low-dropout (LDO) linear regulator that delivers a high amount of power with minimal external components. It is a three-terminal device that can be operated from any type of DC power input.

The device converts the input voltage of 2.5V to a regulated output voltage of 1.8V, 2.5V, or 3.3V, depending on the desired application. The LP38692MPX-2.5 uses an inductor to step down the input voltage, as well as a power MOSFET to control the amount of current flowing to the output. The voltage regulator includes an input voltage sensing circuit that monitors the input voltage and adjusts the output voltage accordingly.

The LP38692MPX-2.5 operates within an input voltage range of 2.5V to 5.5V and can deliver load currents up to 400 mA. The minimum drop-out voltage of the device is 1.3V and the maximum junction temperature is 125°C. The load and line regulation, as well as the output voltage accuracy, are ±0.6%. The high power supply rejection ratio of the device ensures a low level of noise on the output. The device is also protected against short circuit, reverse polarity, over voltage, and over-temperature conditions.

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