MIC39501-2.5BU TR

Voltage Dropout (Max):	0.575V @ 5A
Base Part Number:	MIC39501-2.5
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 - Output:	5A
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.5V
Voltage - Input (Max):	16V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The MIC39501-2.5BU TR is a low-noise, high-efficiency, low-dropout linear voltage regulator that is widely used in applications requiring high-precision power delivery up to 2.5V. The regulator is constructed with a low-noise charge-pump driver circuit and is capable of operating at high efficiency levels with low quiescent current draw.

Application Field

The MIC39501-2.5BU TR is designed for use in portable, battery-powered applications where high output voltage accuracy, low noise, and minimal power dissipation are required. It is especially well-suited for powering low-power integrated circuits, such as microcontrollers, digital signal processor, and ASICs. It is also highly suited for use in automotive, medical, and industrial applications that require high-efficiency voltage regulation. With its low quiescent current, it is capable of delivering power in a wide range of supply conditions and input voltages.

Working Principle

The MIC39501-2.5BU TR operates using a high-efficiency, low-noise charge-pump control. The charge-pump control circuit is responsible for regulating the output voltage with minimal noise and power dissipation. The high-efficiency regulator scheme allows for power delivery with low quiescent current draw.The regulator consists of two main components – the error amplifier and a linear regulator. The error amplifier compares the output voltage with a reference voltage and generates an error signal. The error signal is then used to control the linear regulator, which adjusts the output voltage to match the reference voltage. The linear regulator consists of an N-channel Mosfet, a shunt regulator, and a voltage follower stage.When the output voltage is lower than the reference voltage, the error amplifier pulls the gate of the Mosfet low, resulting in a higher voltage across it. The increased voltage across the Mosfet causes it to conduct more current, which increases the output voltage. The shunt regulator prevents excessive current flow and the voltage follower stage ensures that the feedback voltage is equal to the reference voltage.

Conclusion

The MIC39501-2.5BU TR is a low-noise, high-efficiency, low-dropout linear voltage regulator that is capable of providing high-precision power delivery with low-quiescent current draw. It is designed for battery-powered and portable applications where high output accuracy and low power consumption are desired. The regulator is constructed with a charge-pump control circuit and is capable of regulation with minimal noise and power dissipation. It is particularly suited for use in automotive, medical, and industrial applications.

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