LM4120IM5X-1.8

Noise - 0.1Hz to 10Hz:	20µVp-p
Base Part Number:	LM4120
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Current - Supply:	275µA
Voltage - Input:	2 V ~ 12 V
Noise - 10Hz to 10kHz:	36µVp-p
Series:	--
Temperature Coefficient:	50ppm/°C
Tolerance:	±0.5%
Current - Output:	5mA
Voltage - Output (Min/Fixed):	1.8V
Output Type:	Fixed
Reference Type:	Series
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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<h1>Power Management Integrated Circuit (PMIC) - Voltage Reference</h1><h2>LM4120IM5X-1.8 Application Field and Working Principle</h2><p>A power management integrated circuit (PMIC) is a device used to control and measure the power levels of a device or system. They are usually used in the design of power-sensitive equipment like cell phones and laptops, as well as for automotive, industrial, and medical applications. They allow for safe and reliable operation of the systems in which they are used.</p><p>The LM4120IM5X-1.8 is a low-power PMIC specifically designed for mobile and consumer applications. It provides 12V and -12V outputs, adjustable voltage reference and 5V buck converter with dual 2A outputs, a step-down regulator, and a low-noise linear regulator.</p><h3>Application Field</h3><p>The LM4120IM5X-1.8 is a highly integrated power management solution designed for applications that require efficient power conversion and management. The device is designed to save space and improve efficiency in a wide range of products including cell phones, cameras, tablets, set top boxes, displays, TV’s, laptops, and other consumer electronics.</p><p>The device should be considered for use in any product requiring multiple step down, fixed or adjustable voltage references, and low-noise LDO’s. It is a highly efficient device with integrated support circuitry and power components, which makes it well-suited for applications where efficiency and space savings is a must.</p><h3>Working Principle</h3><p>The LM4120IM5X-1.8 is a fully integrated power management integrated circuit. It consists of a 5V buck converter, 12V and -12V linear regulators, adjustable voltage references, low-noise line regulator, and support circuitry. The device is designed with a switch-mode architecture which provides higher efficiency compared to linear designs by switching off parts of the power conversion circuitry when it’s not needed.</p><p>The 5V buck converter is used for step down voltage conversion, while the 12V and -12V regulators are used to provide high efficiency and accurate power output, and low-noise linear regulators are used to provide a low-noise output signal. The adjustable voltage references allow the user to adjust the voltage output to the desired level. The device also supports over current and over voltage protection, temperature sensing, and programmable soft-start which helps to reduce inrush current during startup.</p><p>In addition to providing the power conversion and management functions, the LM4120IM5X-1.8 also provides a very low output noise level which makes it ideal for applications requiring a very low noise output. The device also features a high accuracy voltage reference for superior voltage regulation accuracy and reliability.</p><h3>Conclusion</h3><p>The LM4120IM5X-1.8 is a very high-performance and feature-rich PMIC which is designed for low-power and space-constrained applications. It provides a 5V buck converter, 12V and -12V linear regulators, adjustable voltage references, and low-noise LDO’s to provide highly efficient power conversion and management while providing a low output noise level. The device also includes over-current and over-voltage protection, temperature sensing, and programmable soft-start which helps to reduce inrush current during startup.</p>

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