LP2985AIM5-2.7

Current - Output:	150mA
Base Part Number:	LP2985
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:	45dB (1kHz)
Current - Supply (Max):	2.5mA
Current - Quiescent (Iq):	95µA
Series:	--
Voltage Dropout (Max):	0.58V @ 150mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.7V
Voltage - Input (Max):	16V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

LP2985AIM5-2.7 is a linear voltage regulator designed by National Semiconductor for powering microcontroller-based devices. It is part of their Power Management IC (PMIC) family and is a versatile low-dropout regulator (LDO) capable of providing up to 2.7V of regulated voltage supply to the microcontroller. Some of the features and benefits of the device include stable output voltage, minimum quiescent current, thermal shutdown protection, fast startup, and wide output voltage set point range.

Application Field

LP2985AIM5-2.7 is used in a wide range of electronics applications, including automotive, consumer, industrial, and communications. Its prime application is in powering microcontrollers, but it is also suitable other types of components and systems, such as flash memory and sensors, to name a few. It is particularly helpful in low voltage system design, where an accurate and stable reference voltage is needed. In automotive systems, for instance, the LP2985AIM5-2.7 provides dynamic power control and can be used in safety-critical systems, providing thermal protection features for certain components. In consumer applications, it can be used for power management in LCD displays, portable electronic devices, and toys. In industrial applications, it is used to power controllers and process control systems. And, in communications, the regulator provides stable power supply for switched mode power supplies and base station power, as well as networking and telecom systems.

Working Principle

LP2985AIM5-2.7 is a low-dropout voltage regulator that could supply up to 2.7V of regulated output. It has an input voltage range of 2.7V to 28V and an output voltage range of 0.8V to 2.7V.The basic working principle of the regulator is that it takes an unregulated input voltage, usually from a battery or switching power supply, and reduces it down to a stable output voltage. This is accomplished by a control circuit composed of voltage feedback, error amplifiers, reference voltage, and current limit references. When the input voltage is greater than the output voltage, the regulator is turned on, thereby providing the regulated output voltage.

Conclusion

National Semiconductor’s LP2985AIM5-2.7 is a versatile low-dropout voltage regulator that is suitable for a wide range of applications. The device’s main application is powering microcontrollers, but it can be used in various other electronics applications as well. It is a stable, accurate regulator with a wide input and output voltage range and fast startup time, making it a great choice for low voltage system design.

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