LP2981A-33DBVTE4

Current - Output:	100mA
Base Part Number:	LP2981A-33
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	Enable
PSRR:	63dB (1kHz)
Current - Supply (Max):	1.7mA
Current - Quiescent (Iq):	95µA
Series:	--
Voltage Dropout (Max):	0.37V @ 100mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	16V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LP2981A-33DBVTE4 Application Field and Working Principle: Introduction

The LP2981A-33DBVTE4 is a linear voltage regulator that is designed to provide a stable output voltage with a wide input range. The output voltage is adjustable with its internal scaling resistors, so the user can easily set any desired output voltage. Its ultra-low quiescent current makes it suitable for battery-powered devices, while its high current capability and low noise make it suitable for a variety of other applications.

Application Fields

The LP2981A-33DBVTE4 can be used in a variety of applications, including:

• Battery-powered devices, including portable medical equipment, computer peripherals and consumer electronic devices, such as cell phones, digital cameras and PDAs.
• Industrial and automotive applications, such as motor drives, LED lighting, and engine control systems.
• Closed loop feedback control systems.
• Gaming and audio equipment.
• Voltage regulators for embedded systems and processors.

Features

The LP2981A-33DBVTE4 offers a number of features that make it a highly attractive option for linear voltage regulator applications:

• Wide input voltage range: It can operate from 3.3V to 125V, depending on the output voltage requirement.
• High output current capability: It can deliver up to 1A of output current.
• Low output noise: The output noise is typically less than 10mV.
• Low quiescent current: The quiescent current for the device is typically just 1mA.
• Adjustable output voltage: The output voltage can be adjusted with its internal scaling resistors.

Working Principle

The LP2981A-33DBVTE4 is an adjustable linear voltage regulator. It operates by sensing the difference between the input voltage and the preset output voltage and adjusting the current flow accordingly. It contains an error amplifier, a bandgap reference, and a totem pole output stage, which are all controlling the output current. The error amplifier senses the difference between the input voltage and the reference voltage and adjusts the output current according to the change. The LP2981A-33DBVTE4 also contains a gain setting resistor, which is used to set the output voltage. By adjusting this resistor, the user can set the desired output voltage. The gain setting resistor also determines how much current can be delivered to the load. The higher the resistance, the lower the output current will be.In addition to its adjustable gain, the LP2981A-33DBVTE4 has an ultra-low quiescent current. This means that the voltage regulator will consume very little power when not in use. This is beneficial in battery-powered applications, as it will help to extend the device\'s battery life. It also has a high current capability, which makes it suitable for a wide range of applications. It also has low output noise, which makes it suitable for use in sensitive electronics applications.

Conclusion

The LP2981A-33DBVTE4 is a linear voltage regulator that offers a wide range of features and functions. Its wide input voltage range, adjustable output voltage, high current capability, ultra-low quiescent current, and low output noise make it suitable for a variety of applications, including battery-powered devices, industrial and automotive applications, and closed loop feedback control systems. Its adjustable gain feature also makes it an ideal choice for applications that require an adjustable output voltage.

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