MIC2941ABU TR

Current - Output:	1.25A
Base Part Number:	MIC2941A
Supplier Device Package:	TO-263-5
Package / Case:	TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
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):	70mA
Current - Quiescent (Iq):	500µA
Series:	--
Voltage Dropout (Max):	0.6V @ 1.25A
Voltage - Output (Max):	26V
Voltage - Output (Min/Fixed):	1.24V
Voltage - Input (Max):	26V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Overview

The MIC2941ABU TR is a three-terminal linear voltage regulator designed to work with a wide range of input and output voltages, to provide a stable, short-circuit-protected output voltage. It is an ideal choice for the regulation of a wide range of DC-DC, AC-DC and other regulated power supplies.

Application Fields

The MIC2941ABU TR is ideally suited for powering a wide range of digital and analog applications, such as telecommunication systems, industrial controls, embedded micro-controllers, general-purpose voltage regulators, and many others. It enables reliable, accurate and efficient system power supply solutions that meet the needs of products requiring a wide range of voltage ranges and high accuracy output voltage.

Features and Benefits

The MIC2941ABU TR provides a wide range of features and benefits, including:* Extremely low quiescent current of less than 0.5µA at 3V* High voltage range of 1V~8V* High accuracy output voltage of ± 1%* Logic enable, shutdown and reset functions * Excellent short-circuit current limit protection * Low-dropout voltage and fast start-up * Thermal protection and overvoltage protection

Pin Configuration and Function

The MIC2941ABU TR consists of three pins: IN+, IN- and OUT. The OUT pin is the output voltage pin, which is the regulated output voltage from the voltage regulator IC. The IN+ pin is the positive input voltage pin, which is the input voltage for the voltage regulator IC. The IN- pin is the ground (or return) pin, which acts as the reference voltage for the voltage regulator IC.

Working Principle

The MIC2941ABU TR works by providing a regulated output voltage from an input voltage that is greater than the regulated voltage. The voltage is regulated by sensing the output voltage and adjusting the current flow through a voltage-sensing feedback. This feedback loop prevents the output voltage from exceeding the set regulated voltage level. The device works in two operation stages: startup and regulation.In startup mode, the device initially draws a minimal current until the voltage across it reaches the regulated level, then it switches to a steady-state regulation mode. In steady-state regulation mode, the device measures the output voltage and adjusts the current flow through the voltage-sensing feedback. This adjustment leads to a stable output voltage that is within the set regulated voltage range. The overall operation of the device is governed by the internal selectable shutdown and output voltage control pins. The shutdown function allows the chip to be disabled, while the output voltage control pin allows the user to adjust the output voltage level.

Conclusion

The MIC2941ABU TR is a highly efficient three-terminal linear voltage regulator designed to meet the needs of a variety of applications. It provides a wide range of input and output voltage voltage ranges and excellent regulation accuracy. The device offers several features such as its low quiescent current, high voltage range, high accuracy output voltage, logic enable/shutdown and reset functions, low-dropout characteristics, and thermal and overvoltage protection. This makes it an ideal choice for regulated power supplies.

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