LP38841S-1.2

Current - Output:	800mA
Base Part Number:	LP38841
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:	80dB ~ 65dB (120Hz ~ 1kHz)
Current - Supply (Max):	40mA
Current - Quiescent (Iq):	30µA
Series:	--
Voltage Dropout (Max):	0.21V @ 800mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.2V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Not For New Designs
Packaging:	Tube

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Introduction

LP38841S-1.2 is a linear voltage regulator which belongs to a family of devices that are specifically designed to maintain a constant voltage level even when the input voltage changes due to load current and fluctuations in the power supply line. They are used in various electronic circuits to both step down an input voltage level and 7-14V to a desired output voltage level and maintain that output voltage at a constant level.

LP38841S-1.2 Application Fields

The LP38841S-1.2 is mainly used in electronic products and digital power supply regulators. It is often used as a voltage regulator for all types of SMPS and Switched Mode Power Supplies (SMPS) in domestic, industrial, mobile and automobile systems. Furthermore, it is also used for controlling low-voltage DSP and microcontroller circuits, and as an analog power control chip.The most common applications of the LP38841S-1.2 are found in automotive electronics, medical electronics, and communications systems. It is used to condition the power supply and maintain a regulated voltage level when the line current and supply voltage drops. In automotive electronics, it is mostly used for current drive, overvoltage protection and constant voltage regulation applications. Medical electronics use it for voltage regulation in pacemakers and other devices such as glucose meters. Communications systems use the LP38841S-1.2 for voltage regulation of high current microprocessors and other communications devices.

LP38841S-1.2 Working Principle

The LP38841S-1.2 is a low dropout linear regulator which means that it can maintain a stable voltage even at a very low input voltage. It works by using a voltage reference circuit to set a fixed current for regulating the output voltage. The voltage reference circuit consists of a series of resistors and transistors which act as a voltage divider, controlling the voltage value to the set point.When the input voltage exceeds the output voltage, the device begins to regulate the output voltage. It does this by sinking a current from the input (which is connected to the voltage regulator) and setting the output to the required voltage. The current that it sinks is directly proportional to the difference between the input and output voltage.The LP38841S-1.2 has a very low dropout voltage which means that it remains stable even at very low input voltages and can effectively maintain a constant output voltage with only a small input voltage. This makes it suitable for applications where the input is prone to large fluctuations and for low noise power supplies.The output of the LP38841S-1.2 is also protected from current overloads, which helps to prevent output voltage drops due to excessive current draw from the load.

Conclusion

The LP38841S-1.2 is a linear voltage regulator which is designed to maintain a constant voltage level even when the input voltage changes due to load current fluctuations and supply line drops. It is used in a variety of applications in automotive electronics, medical electronics, and communications systems. Its low dropout voltage and protection from current overloads make it popular for applications where the input voltage is subject to large fluctuations and where low noise power supplies are required.

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