LP2986AILD-5.0

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Introduction

The LP2986AILD-5.0 is a low-power, low-dropout (LDO) three-terminal linear voltage regulator designed specifically for powering small, low-power circuits, such as those found in portable equipment. The device provides an output voltage of 5.0V with a minimum output current of 500mA. It features a wide input voltage range of 2.5V to 24V, and a minimum dropout voltage of 250mV at full load. Additionally, the device has a low quiescent current of 1.5mA and a typical output impedance of 5mΩ. The LP2986AILD-5.0 is well suited for use as a low-power, low-noise supply for low-power integrated circuits, such as microcontrollers, LCDs, and real-time clock (RTC) circuits in applications such as cellphones and other portable devices. The device is available in the tiny 1.2mm × 1.4mm wettable edge 8-pin LLP package.

Features

• Low-Noise Output
• High-Current Output
• Low Quiescent Current
• Wide Input Voltage Range
• Low-Dropout Voltage
• Output Current Limiting
• No External Components Required
• Over Temperature Protection

Application

The LP2986AILD-5.0 is ideally suited for portable applications and small, low-power circuits. It can provide a supply voltage for small circuit boards, such as those found in portable medical and industrial equipment, or in wearable technology. It is suitable for powering LCDs, RTCs, and low-power microcontrollers. The device is also suitable for providing a local, low-noise, low-dropout, power source for a variety of analog and digital circuits operating in low-power applications.

Working Principle

The LP2986AILD-5.0 is an N-channel MOSFET based LDO regulator with a current limiting circuit. The device is based on a voltage-divider principle, where the input voltage is divided by two resistors, a fixed R1 and a feedback resistor R2, which is connected to the feedback pin FB. The R1 and R2 form a voltage divider circuit, the output voltage being determined by the ratio of the resistors. A voltage amplifier then amplifies the output voltage, which is then output via a current boosting stage. The current output regulator includes a current limiting circuit, which prevents overloads and also ensure low noise output.

Conclusion

The LP2986AILD-5.0 is an excellent solution for low-power, low-noise, low-dropout linear voltage regulator. It has a wide input voltage range and can provide up to 500mA of current. The device also features low quiescent current, output current limiting, and over temperature protection. It is well suited for powering low-power integrated circuits, such as microcontrollers, LCDs, and real-time clock (RTC) circuits in portable and other low-power applications.

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