LP2981IM5-5.0

Current - Output:	100mA
Base Part Number:	LP2981
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	Enable
PSRR:	63dB (1kHz)
Current - Supply (Max):	1.7mA
Current - Quiescent (Iq):	95µA
Series:	--
Voltage Dropout (Max):	0.37V @ 100mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	5V
Voltage - Input (Max):	16V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Not For New Designs
Packaging:	Tape & Reel (TR)

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LP2981IM5-5.0 Application Field and Working Principle

The LP2981IM5-5.0 is a linear voltage regulator from Texas Instruments. This regulator is part of the PMIC (Power Management IC) voltage regulators and provides circuits with 5.0V power supply. It is designed to reduce power losses during the power conversion process and enable efficient utilization of power.This device features an adjustable current limit, reverse current protection, and low output voltage ripple. It also incorporates a no-load current automatic shutdown and an adjustable soft start to reduce inrush current.

Features

The LP2981IM5-5.0 is described as “low power”, which means its maximum power dissipation is 200 mW in an ambient temperature of 25°C. Its maximum output current is 0.5A and its output voltage range is adjustable from 4.7V to 6.3V. This voltage regulator also has short-circuit protection, over-temperature protection, an over-voltage lockout, and thermal shutdown.The total quiescent current of the LP2981IM5-5.0 is low, with a normal current of 24 mA and a no-load current of 2.8 mA. The output voltage regulation tolerance is only ±0.8% to ensure accuracy in the voltage being measured. Additionally, its input voltage range is between 4.5V and 12V, allowing it to be used in a wide variety of applications.

Applications

The LP2981IM5-5.0 voltage regulator is designed to be used in many different applications that require a low power, low noise, and low quiescent current power supply. Some of these applications include automotive dashboards, industrial automation, embedded systems, measuring and communication systems, and digital signage.The regulator can also be used for automotive circuit protection. It features reverse current protection, which helps to protect the circuit from short circuit conditions and voltage surges, and a no-load current automatic shutdown to avoid overheating.

Working Principle

The LP2981IM5-5.0 is a linear voltage regulator that works by controlling the output voltage with the help of a feedback loop. The device uses an op-amp to compare the reference voltage to the output voltage. The op-amp outputs a signal, which is then fed to the voltage regulator.The regulator then adjusts its output current to regulate the output voltage. When the output voltage exceeds the reference voltage, the regulator increases the output current, which in turn reduces the output voltage. When the output voltage drops below the reference voltage, the output current is decreased, which increases the output voltage.The voltage regulator is also protected by several safety features such as over-temperature protection, over-voltage lockout, and short-circuit protection. These features prevent the device from being damaged by excessive current or voltage. Additionally, the device features an adjustable soft start to reduce the inrush current when powering up.

Conclusion

The LP2981IM5-5.0 linear voltage regulator is designed to provide a low power, low noise, and low quiescent current solution for applications that require a 5.0V power supply. Its adjustable current limit, reverse current protection, and low output voltage ripple make it suitable for many different applications such as automotive dashboards, industrial automation, embedded systems, measuring and communication systems, and digital signage. It is also protected by several features such as over-temperature protection, over-voltage lockout, short-circuit protection, and an adjustable soft start. With its reliable performance and safety features, the LP2981IM5-5.0 is an excellent choice for those who are looking for a reliable power supply solution.

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