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Linear Voltage Regulators

Introduction

A voltage regulator is an imperative component in any power system as it helps maintain a stable voltage level. Linear voltage regulators are one of the popularly used voltage regulators for consumer electronics and industrial applications, due to its ease of use and low cost. The LT3042HMSE#TRPBF is one of the popular linear voltage regulators from Linear Technology Corporation, considered suitable for both consumer electronic and industrial applications.

LT3042HMSE#TRPBF Application Fields

The LT3042 is a highly efficient low-dropout voltage regulator. It’s well-suited for applications requiring low-voltage, high-current and high-accuracy. The adjustable version provides low noise (<3uVrms) and output voltage range of 0.825V to 5.075V with 0.6% accuracy. A maximum current of up to 2A is provided on the 300 mΩ P-channel device.

The LT3042 is a versatile regulator that is suitable for numerous applications including battery-powered systems, post-regulation of switched-mode power supplies, FPGA and ASIC supplies and memory core supplies. Other possible applications include 12V systems, telecom power supply, automotive and industrial equipment.

LT3042HMSE#TRPBF Working Principle

The LT3042 Linear Voltage Regulator is based on an innovative low-noise P-channel architecture to improve transient performance, power efficiency and reduce power dissipation and size of the regulator. It acts as an ultra-low Iq pass regulator which also has the ability to strongly reject ripple interferences and reduce input voltage fluctuations. The regulator is protected from striking an overload current.

The internal circuitry of the regulator comprises of a P-channel power MOSFET, a voltage reference and a voltage error amplifier circuit. Low-dropout P-channel MOSFET passes steady but low amount of current, while the voltage reference maintains a constant voltage output. The voltage error amplifier amplifies any discrepancy between the reference voltage and the voltage at the output terminal and then takes corrective action to maintain a constant output voltage.

Conclusion

The LT3042HMSE#TRPBF is an efficient, reliable and feature-rich linear voltage regulator from Linear Technology Corporation. It is highly suitable for a wide range of applications, including battery-powered systems, post-regulation of switched-mode power supplies, FPGA and ASIC supplies, memory core supplies, 12V systems, telecom power supply, automotive and industrial equipment. The regulator is based on a low-noise P-channel architecture, making it more efficient and suitable for use in high-current and high-accuracy applications.

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