LM317LIPWRG4

Voltage Dropout (Max):	--
Base Part Number:	LM317L
Supplier Device Package:	8-TSSOP
Package / Case:	8-TSSOP (0.173", 4.40mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	--
PSRR:	80dB ~ 65dB (120Hz)
Current - Output:	100mA
Series:	--
Voltage - Output (Max):	32V
Voltage - Output (Min/Fixed):	1.2V
Voltage - Input (Max):	38V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

LM317LIPWRG4 is a high-performance linear voltage regulator (LVR) designed to provide power regulation in a system. It is part of Texas Instruments\' LM317LIPWR Series, which is one of the most popular linear voltage regulators. The LM317LIPWRG4 device offers superior current limiting and thermal protection, making it suitable for a wide range of applications, including computing, gaming, and automotive. Furthermore, it has a low standby current and a wide operating temperature range, giving it the versatility required in many modern applications.

LM317LIPWRG4 Application Field

The LM317LIPWRG4 is a linear voltage regulator, which offers power conversion in a system. It generates precise low AC output, so it is widely used for low power supply devices, such as RF transmission equipment, audio amplifiers, medical systems, office automation systems, etc. The LVR can also be used for LED drivers, 4.5V to 18V DC to DC converters, PCI-E power supplies, etc. With its excellent current limiting and thermal protection, it is the most popular choice for critical voltage regulation applications.

LM317LIPWRG4 Working Principle

The LM317LIPWRG4 device consists of two main components, a control circuit and a pass device. The control circuit is equipped with two current feedbacks, allowing for an extremely accurate current setting and voltage output. The control circuit also contains a band-gap reference which is used for comparison and set out a reference voltage. The pass device is an P-type MOSFET which is used to control the current flow from input voltage to output voltage.The operation of the LM317LIPWRG4 is quite simple. When the input voltage is applied, the control circuit sets out the reference voltage level. This reference voltage is compared to the output voltage. If the output voltage is higher than the reference voltage, then the MOSFET will start to turn off and the current flow will decrease. As the current decreases, the output voltage drops, bringing it to the desired level. Conversely, if the output voltage is lower than the reference voltage, the MOSFET will start to turn on, increased the current flow, thus increasing the output voltage until it reaches the desired level.

Conclusion

The LM317LIPWRG4 is a high-performance linear voltage regulator that offers precise low AC output for low power supply applications. Its excellent current limiting and thermal protection make it very popular for critical voltage regulation applications. Furthermore, its low standby current and wide operating temperature range make it a suitable solution for many modern applications.

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