LP3853ES-3.3

Current - Output:	3A
Base Part Number:	LP3853
Supplier Device Package:	DDPAK/TO-263-5
Package / Case:	TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
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):	4mA
Series:	--
Voltage Dropout (Max):	0.6V @ 3A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	7V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Not For New Designs
Packaging:	Tube

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LP3853ES-3.3 Application Field and Working Principle

Introduction to LP3853ES-3.3 Voltage Regulator

The LP3853ES-3.3 Voltage regulator is an adjustable, low quiescent current, high efficiency, low dropout linear regulator designed to operate from 0.8 V to 6.0 V input voltage and provide an output voltage of 3.3 V with up to ±2.5% accuracy over line and load variations. It is designed to provide constant output voltage and minimize power dissipation at the same time. The LP3853ES-3.3 Linear regulator is a good choice for applications where efficiency is important, such as point-of-load regulation, industrial catering, communication systems, and battery systems. It operates at 40 mV (typ) dropout voltage over the full load range and offers good transient performance. Its high efficiency helps conserve power in battery-operated systems, enabling maximum battery life from one charge.

LP3853ES-3.3 Application Fields

The LP3853ES-3.3 Linear regulator is suitable for a wide range of applications, especially in systems where efficiency is a priority. It is used in many systems where power saving is important, such as handheld devices, battery-powered systems, and portable communication devices. Due to its low quiescent current and small size, it is ideal for portable and mobile applications.It is often used in industrial automation systems, secure storage and communication systems, and in portable medical devices that require high-efficiency, low power, and small size. It is also suitable for embedded systems, automotive applications, and battery-operated equipment, such as cameras and wireless communication devices.

LP3853ES-3.3 Working Principle

The LP3853ES-3.3 is a linear regulator that provides constant output voltage under different conditions and load variations. It works by comparing the feedback voltage with a reference voltage and then controlling the output voltage to maintain a constant output voltage. The reference voltage is set by a resistor divider, and the feedback voltage is measured by a voltage sensing pin, which is connected to the output voltage.The device starts regulating the output voltage when the input voltage exceeds the output voltage by 40 mV (typ). During normal operation, the current drawn from the input is proportional to the load current, with a constant quiescent current of 15 uA (typ).The LP3853ES-3.3 has overcurrent protection, thermal protection and undervoltage protection, which protect the device in the event of excessive input voltage, excessive current draw, or short circuit conditions. It also has a low-battery warning LED, which lights up when the input voltage drops below the minimum operating voltage.

Conclusion

The LP3853ES-3.3 Linear regulator is a high-efficiency, low power, and small size voltage regulator, ideal for applications where efficiency is important. It is suitable for a wide range of applications, including industrial automation systems, secure storage and communication systems, and embedded systems, automotive applications, and battery-operated equipment. It works by comparing the feedback voltage with a reference voltage and then controlling the output voltage to maintain a constant output voltage. It provides overcurrent protection, thermal protection and undervoltage protection.

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