LP3855EMP-2.5/NOPB

Current - Output:	1.5A
Base Part Number:	LP3855
Supplier Device Package:	SOT-223-5
Package / Case:	TO-261-5, TO-261AB
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	Enable
PSRR:	73dB ~ 57dB (120Hz)
Current - Supply (Max):	10mA
Current - Quiescent (Iq):	3mA
Series:	--
Voltage Dropout (Max):	0.44V @ 1.5A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.5V
Voltage - Input (Max):	7V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The LP3855EMP-2.5/NOPB is a linear voltage regulator. It is a highly accurate, ultra low dropout, CMOS-based voltage regulator designed to provide a stable voltage output of 2.5V.

Features

The LP3855EMP-2.5/NOPB features a low dropout voltage of 100mV, a wide operating voltage range from 2.5V to 20V and an output current up to 300mA. It also features low operating current of 10μA and an enable pin which can be used to turn off the device when not in use, reducing the operating current to 6μA. Other features include an operating temperature range of –40°C to +125°C, and over-voltage, under-voltage, and over-current protection.

Application Field

The LP3855EMP-2.5/NOPB is an ideal voltage regulator for use in a variety of applications. It can be used in mobile phones, digital cameras, audio players, radio receivers, digital TVs and other portable electronic devices. Due to its low dropout voltage and low operating current, it is particularly suitable for battery-powered applications.

Working Principle

The LP3855EMP-2.5/NOPB utilizes a CMOS-based linear regulator. This is a type of voltage regulator that uses an operational amplifier (op amp) to regulate the voltage output. The voltage output is controlled by an error amplifier, which compares the actual output voltage with the reference voltage. If there is an error between the two, the op amp adjusts the current supplied to the pass transistor, which in turn adjusts the output voltage to the desired value. The feedback loop of the error amplifier helps to ensure that the output voltage remains stable, regardless of changes in input voltage, output current, or temperature.

Conclusion

The LP3855EMP-2.5/NOPB is a linear voltage regulator which is ideally suited for use in a wide range of applications. It is a highly accurate, low dropout voltage regulator with an enable pin which can be used to turn off the device when not in use. With its wide operating range, ultra-low operating current, and over-voltage, under-voltage, and over-current protection, the LP3855EMP-2.5/NOPB is an excellent choice for battery-powered applications.

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