MIC2177-5.0BWM-TR

Voltage - Output (Min/Fixed):	5V
Base Part Number:	MIC2177
Supplier Device Package:	20-SOIC
Package / Case:	20-SOIC (0.295", 7.50mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	200kHz
Current - Output:	2.5A
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	16.5V
Voltage - Input (Min):	4.5V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Discontinued at Digi-Key
Packaging:	Tape & Reel (TR)

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Introduction

MIC2177-5.0BWM-TR is a device that automatically switch and regulate voltages. It takes advantage of the Pulse Width Modulation (PWM) technique to effectively regulate the output voltage. This type of switch regulator targets applications that work with a variety of input voltages and need low-cost, low-power and high efficiency DC-to-DC power solutions. It can also respond very quickly to transient conditions and hence, its maximum efficiency at high switching frequencies.

Applications

The MIC2177-5.0BWM-TR is suitable for a wide variety of applications. It is designed primarily for fixed voltage, step-up and step-down power converters in communications, computing and automotive markets. Some examples include, mobile phones, laptops, tablets, and embedded products such as medical equipment and automobiles. Furthermore, the device is perfect for automotive applications like multifunctional antenna powered with a high-current and low-ripple buck converter.

Features

The MIC2177-5.0BWM-TR offers several features that make it perfect for multiple applications. It comes with input voltage capability of 4.5-30V, output voltage range of 0.6V-6V, adjustable switching frequency of up to 500kHz, and current of up to 1.5A. The device also includes built-in over voltage protection and low shutdown current, which can extend battery life. Other features include soft-start, thermal shutdown, and a minimum of external components, all in a small SOP package.

Working Principle

The MIC2177-5.0BWM-TR utilizes PWM to regulate its output voltage. It works by switching the input voltage through a switch connected to an inductor. The output voltage is generated by a low-dropout regulator, which follows the switch output at all times. The current through the switch is controlled by a PWM signal generated in the active loop.The design of the MIC2177-5.0BWM-TR starts with an input capacitor that holds the input voltage. During operation, the voltage is delivered to the switch, which is controlled by the PWM controller. The voltage then goes through an inductor, where the energy is stored. When the inductor current reaches the peak, the switch turns off, and the inductor current starts to decrease.The output voltage is provided by the low drop-out regulator (LDO). The LDO is followed by the output capacitor, which absorbs the switching noise and stabilizes the output voltage. In order to regulate the output voltage, the LDO can be programmed via an external voltage divider. The output voltage will remain constant as long as the input voltage is in a certain range.

Conclusion

The MIC2177-5.0BWM-TR is a voltage regulator capable of providing high efficiency, low cost and low power DC-to-DC solutions. It is suitable for a range of applications such as communications, computing, automotive and embedded products. The device offers several features like adjustable switching frequency, protection features, soft-start and thermal shut down. It utilizes PWM technique to achieve its performance and has a minimum of external components.The device is ideal for applications that require strict voltage regulation in response to sudden load changes. With its wide range of voltages and output current, this device fits very well in applications with different power requirements. Therefore, the MIC2177-5.0BWM-TR is the perfect device for both small and large projects.

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