LP2982AIM5X-5.0/NOPB

Current - Output:	50mA
Base Part Number:	LP2982
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:	45dB (1kHz)
Current - Supply (Max):	1.4mA
Current - Quiescent (Iq):	95µA
Series:	--
Voltage Dropout (Max):	0.33V @ 80mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	5V
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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Application Field and Working Principle of LP2982AIM5X-5.0/NOPB

Introduction

The LP2982AIM5X-5.0/NOPB is an ultra-low-dropout (LDO) voltage regulator designed to provide a regulated output voltage with excellent line and load regulations over a wide range of load current and input voltage variations, while consuming a minimal amount of quiescent current. This device is designed to handle a minimum input voltage of 1V, making it particularly well-suited for single-cell Li-ion battery applications with low output voltages (e.g. 1.0V to 3.3V). The LP2982AIM5X-5.0/NOPB also features a shutdown control input that allows users to place the device in a low-current state for increased power savings.

Application Fields

The LP2982AIM5X-5.0/NOPB features a 0.5A maximum output current, making it suitable for a wide range of consumer and industrial applications, including cell phones, PDAs, flat panel displays, networking access, point-of-sale terminals, digital audio players and automotive applications. In addition, this device is ideal for applications that require minimum standby current while also providing a minimum dropout voltage of 50mV at a load current of 0.5A.

Working Principle

The LP2982AIM5X-5.0/NOPB is a linear voltage regulator that operates by means of an internal bandgap reference and an error amplifier. The device is constructed in hafnium dioxide (HfO2) technology with a voltage controlled oscillator (VCO).TheLP2982AIM5X-5.0/NOPB consists of an integrated voltage regulator and voltage reference, both of which are used to regulate the output voltage of the device. The voltage regulator consists of an error amplifier and a high-current FET. The error amplifier continuously monitors the output voltage by comparing it to the voltage reference voltage. The error amplifier then adjusts the gate voltage of the high-current FET to maintain the desired output voltage. The voltage reference is configured using the internal VCO and the band gap reference circuit.The output voltage is adjusted by the external resistors connected to the error amplifier’s FB pin. Using the appropriate external resistors, the user can adjust the output voltage of the regulator over a range of 1V to 5V.

Conclusion

The LP2982AIM5X-5.0/NOPB is an ultra-low-dropout linear voltage regulator that offers excellent line and load regulation over a wide range of input voltage and load current variations. This device is particularly well-suited for single-cell Li-ion battery applications with low output voltages. The LP2982AIM5X-5.0/NOPB also features a shutdown control input, making it an ideal choice for applications that require minimum standby current while also providing minimum dropout voltage at a load current of 0.5A. The output voltage of this device can be adjusted over a range of 1V to 5V.

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