LP2954AIMX/NOPB

Current - Output:	250mA
Base Part Number:	LP2954
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity
Control Features:	Enable
PSRR:	--
Current - Supply (Max):	33mA
Current - Quiescent (Iq):	150µA
Series:	--
Voltage Dropout (Max):	0.8V @ 250mA
Voltage - Output (Max):	29V
Voltage - Output (Min/Fixed):	1.23V
Voltage - Input (Max):	30V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LP2954AIMX/NOPB Application Field and Working Principle

LP2954AIMX/NOPB is part of the Voltage Regulators - Linear segment of the Power Management and Integrated Circuits (PMIC) or the integrated circuits and modules used to manage the power supply to the circuit. It is a versatile three-terminal low-dropout adjustable regulator from Texas Instruments, designed to supply up to 100mA of output current, equivalent to not less than 1.2V dropout voltage. Its advantages include ultra-low quiescent current and low outputs in 0.1V increments.This article will provide an in-depth explanation of the LP2954AIMX/NOPB application field and its working principle.

Application Field

The LP2954AIMX/NOPB is mainly used in applications such as PDAs, smartphones and digital cameras, to name a few. It is used when the flexibility of adjustable output voltage and low quiescent current is required. The LP2954AIMX/NOPB\'s robust input voltage range is compatible with a wide variety of supplies and its versatility makes it suitable for numerous circuits with the same output voltage.Due to the device\'s ultra-low output voltage range from 0.5 to 5.5V, the LP2954AIMX/NOPB can be used for monitoring and controlling low current applications like CPU core supersets, analog circuits, radios and panoramic audio systems, combined with an on/off control over an I2C bus for state machines. This can be done without affecting the load voltage for current operations.

Working Principle

LP2954AIMX/NOPB operates using an internal network of integrated circuits which include a current source, an operational amplifier and a pass element, such as a transistor, diode or a Darlington transistor.The current source is connected to the output terminal of the amplifier and is divided into three branches. This enables a larger area of operation where the power supply voltage is absent or near zero. The voltage regulator is adjustable and can be set at the desired level, thanks to the adjustable reference.The pass element and current source control the output current, while the control and power source are connected to two terminals of the LP2954AIMX/NOPB and the pass element is connected to the third terminal. This design allows for output voltage to remain at a constant level, regardless of load current or input voltage.The LP2954AIMX/NOPB\'s current regulation characteristic has a fast response time, which means that the output voltage is maintained stable, with only a small amount of output current variation.

Conclusion

The LP2954AIMX/NOPB provides a wide range of applications for voltage regulation, as well as its built-in current source, adjustable reference, and fast response time. Its ultra-low output voltage range, combined with the low quiescent current, makes it ideal for various applications including PDAs, smartphones, cameras, and even applications with an on/off control, such as CPU core supersets, radios, and panoramic audio systems.

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