MAX8891EXK89+T

Current - Output:	150mA
Base Part Number:	MAX8891
Supplier Device Package:	SC-70-5
Package / Case:	5-TSSOP, SC-70-5, SOT-353
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	65dB (10kHz)
Current - Quiescent (Iq):	40µA
Series:	--
Voltage Dropout (Max):	0.135V @ 120mA (Typ)
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.9V
Voltage - Input (Max):	6V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The MAX8891EXK89+T is a linear voltage regulator with a +3.3V output. It is a product of Maxim Integrated, a high-performance analog and digital signal processing company. The linear regulator is designed to provide stable output voltage with a wide input voltage range of 4.5V to 5.5V and is capable of supplying up to 2A of output current with a small heat dissipation. The MAX8891EXK89+T is ideal for high current and all voltage regulation applications, such as power management and motor control in industrial and medical equipment, automotive electronics, and battery operated systems.

Application

The MAX8891EXK89+T voltage regulator is ideally suited for a variety of applications, including power management for industrial, medical and automotive applications. In medical applications, the MAX8891EXK89+T can be used to provide a reliable +3.3V power supply for controlling medical instruments and diagnostic equipment. Automotive applications include providing constant output voltage for engine control systems, audio systems, and other on-board automotive electronics. Additionally, the MAX8891EXK89+T can be used in battery operated systems, including portable devices, such as digital cameras and mobile phones.

Benefits

The MAX8891EXK89+T provides several benefits that make it ideal for these applications. The device is designed to dissipate very low levels of heat compared to traditional linear regulators. This reduces the need for additional cooling methods and heat sinks, which can help save space in the design and reduce system costs. The MAX8891EXK89+T is also RoHS compliant and UL certified, further adding to its level of safety and reliability.

Working Principle

The MAX8891EXK89+T works by using a linear reference voltage of 3.3V and a built-in error amplifier to regulate the output voltage from a given input voltage. The error amplifier senses the voltage difference between the reference voltage and the output voltage through an internal voltage divider and adjusts the output voltage accordingly. Once the output voltage is adjusted by the error amplifier, the device will reach steady state and maintain an output voltage that is close to the reference voltage set at 3.3V. The device also provides protection against over current conditions, as it includes a current limit circuit. This allows for the output voltage to remain constant across a wide range of load current without the need for active voltage regulation.

Conclusion

The MAX8891EXK89+T is an ideal linear voltage regulator for a wide range of applications requiring reliable and efficient power management. The device can provide a stable output voltage of +3.3V from a wide input voltage range of 4.5V to 5.5V, with very low levels of power dissipation. Additionally, the device provides overcurrent protection and is RoHS compliant and UL certified. These features make the MAX8891EXK89+T a great choice for applications in industrial and medical equipment, automotive electronics, and battery operated systems.

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