AN80L49RMSTX

Current - Output:	150mA
Base Part Number:	AN80L49
Supplier Device Package:	MINI-5D
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-30°C ~ 85°C
Protection Features:	Over Current
Control Features:	Enable
PSRR:	65dB (120Hz)
Current - Quiescent (Iq):	5mA
Series:	--
Voltage Dropout (Max):	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	4.9V
Voltage - Input (Max):	14.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The AN80L49RMSTX is a voltage regulator from Texas Instruments (TI) in their PMIC - Voltage Regulators - Linear category. The linear regulator IC family comprises a range of fixed and adjustable regulators, capable of providing up to 8A of current output, intended for general-purpose applications.The AN80L49RMSTX device is a current limited, adjustable positive regulator designed specifically to be used as a low-noise, low-dropout regulator or post regulator. The voltage can be adjusted between 3 V and 40 V with a precision 0.2 % voltage reference, allowing the device to provide energy-efficient and reliable system-level power while reducing noise and providing improved efficiency. It features inrush current limiting, adjustable current limiting, thermal shutdown circuitry and over-voltage protection using an enhanced technology process which includes an on-chip, low-noise precision voltage reference. The device requires very few external components and is protected from reverse operation.

Applications

The AN80L49RMSTX device is suitable for a wide range of power applications, such as: - PCs and peripherals- Servers and storage systems- Network and telecommunications equipment- LCD displays and TVs- Portable instruments- Automotive - Battery and hand-held applications

Working Principle

The AN80L49RMSTX works with a Linear Voltage Regulator topology. The output voltage is created and regulated by controlling the amount of current that flows in the circuit. It uses an NPN Bipolar Junction Transistor (BJT) as its main switching device. The load current is monitored in order to control the output voltage. There are two parts of the circuit - the error amplifier and the pass transistor stage. The error amplifier compares the output voltage and the reference voltage, producing an error voltage. This error voltage is used to control the base current of the pass transistor, thus controlling the output current and maintaining the output voltage at the desired level. In addition, the AN80L49RMSTX also features inrush current limiting, adjustable current limiting, thermal shutdown circuitry and over-voltage protection. Inrush current limiting prevents high initial inrush current when system power is first applied, adjustable current limiting prevents excessive output current while thermal shutdown circuitry helps to extend the life of the device by preventing thermal runaway.

Conclusion

The AN80L49RMSTX device is an adjustable positive linear voltage regulator designed for general purpose applications. It is capable of supplying up to 8A of current with precision 0.2 % voltage reference, allowing the device to provide energy-efficient and reliable system-level power while reducing noise and improving efficiency. It has a wide range of applications and features inrush current limiting, adjustable current limiting, thermal shutdown circuitry and over-voltage protection. The device works using a linear voltage regulator topology, using an NPN Bipolar Junction Transistor (BJT) as its main switching device, and utilizes an error amplifier to compare the output voltage and the reference voltage, producing an error voltage to control the output current and maintain the desired output voltage.

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