LM337D2TR4

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Output Configuration:	Negative
Output Type:	Adjustable
Number of Regulators:	1
Voltage - Input (Max):	-40V
Voltage - Output (Min/Fixed):	-1.2V
Voltage - Output (Max):	-37V
Voltage Dropout (Max):	--
Current - Output:	1.5A
Current - Quiescent (Iq):	6mA
Current - Supply (Max):	10mA
PSRR:	77dB (120Hz)
Control Features:	--
Protection Features:	Over Current, Over Temperature
Operating Temperature:	0°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
Supplier Device Package:	D2PAK
Base Part Number:	LM337

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Introduction

The LM337D2TR4 is a three-terminal adjustable voltage regulator from the LM337 series of low-dropout regulators. It operates from an input voltage range of 2.5V to 40V and provides up to 800mA current output capabilities. It is also with overcurrent and thermal shut down protection in order to avoid any potential damage to its components. As it offers low noise and low ripple, this device can be applied to many different applications, especially in power supplies, such as computer motherboards, sound systems, instrumentation, telecommunications, etc.

Application fields

The LM337D2TR4 is a low-dropout adjustable voltage regulator, and is able to maintain a regulated output voltage over a wide range of input voltage fluctuations. As such, it can be used as a stabilized power supply in various applications, such as computer motherboards, sound systems, instrumentation, telecommunications, and more.The device can be used to regulate the voltage of a microprocessor, providing precisely the amount of power that is necessary for the processor to operate optimally. Additionally, it is also suitable for powering embedded devices, providing accurate and stable power for memory and peripheral devices.The LM337D2TR4 is also suitable for applications where high efficiency and low noise are important. It can be used in battery-powered devices, where it provides a smooth, quiet power source for the device without excessive power consumption.

Working principle

The LM337D2TR4 is an adjustable low-dropout three-terminal regulator, meaning it provides a regulated output voltage while maintaining a low voltage at the output, regardless of the input voltage. It is designed to maintain a regulated output voltage over a wide range of input voltage fluctuations. This is achieved by maintaining a constant input-to-output differential voltage. The device consists of an adjustable voltage reference and an error amplifier, to provide an output voltage that is exceptional in precision, noise, and ripple characteristics.When the device is powered up, the output voltage is equal to the reference voltage, minus the difference between the reference voltage and the settings of the variable resistor R1. As the voltage increases, the output voltage follows the increase until the difference between the reference voltage and the variable resistor settings reaches a certain threshold and the regulator starts to reduce the output voltage. However, once the input voltage reaches a certain level, the voltage regulator stops reducing the output voltage. This ensures that the output voltage is stable and constant.

Conclusion

The LM337D2TR4 is an adjustable voltage regulator with three-terminal and low-dropout characteristics. It is designed to maintain a regulated voltage over a wide range of input voltage fluctuations, making if suitable for various applications, such as computer motherboards, sound systems, instrumentation, telecommunications, embedded devices, and battery-powered devices. The device consists of an adjustable voltage reference and an error amplifier, to provide exceptional precision, noise, and ripple characteristics.

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