MIC4950YFM-TR

Series:	Hyper Speed Control®
Packaging:	Tape & Reel (TR)
Part Status:	Active
Function:	Step-Down
Output Configuration:	Positive
Topology:	Buck
Output Type:	Adjustable
Number of Outputs:	1
Voltage - Input (Min):	2.7V
Voltage - Input (Max):	5.5V
Voltage - Output (Min/Fixed):	0.625V
Voltage - Output (Max):	5.5V
Current - Output:	5A
Frequency - Switching:	Up to 3.3MHz
Synchronous Rectifier:	Yes
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.209", 5.30mm Width)
Supplier Device Package:	8-SOIC
Base Part Number:	MIC4950

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Introduction

The MIC4950YFM-TR is a DC-DC switching regulator, or a voltage regulator, that is used in a variety of applications. This type of voltage regulator is extremely efficient, providing a high degree of control over the output voltage. The MIC4950YFM-TR offers a wide input voltage range, an adjustable output voltage, and low voltage drop. Additionally, it includes short-circuit protection, thermal shutdown, and overvoltage protection.

Applications

The MIC4950YFM-TR voltage regulator is designed for use in applications that require precision voltage control and switching. These applications include telecom and datacom systems, instrumentation systems, distributed power systems, portable computing, and industrial and consumer electronics.In telecom systems, the MIC4950YFM-TR provides power management for inactive power supplies and standby power equipment, such as optical multiplexers, modems, and VoIP routers. It is also used in high-density computing applications, such as blade servers and CPUs, where high efficiency and small footprint are key goals.In distributed power systems, it is used to provide power conditioning and voltage regulation for the distributed power supplies, such as the AC-DC, DC-DC, AC-AC and DC-AC converters. Its highly efficient design allows it to be used in both low-noise and high- noisedistributed power architectures.Finally, the MIC4950YFM-TR is used in many consumer electronics as a power conditioning layer. It provides highly efficient power transfer, while protecting downstream components from power disturbances.

Working Principle

The MIC4950YFM-TR incorporates a UCC27454 driver and a MIC49552 gate driver for maximum efficiency. It is designed to work in either switching or linear modes, depending on the needs of the application.In switching mode, the MIC4950YFM-TR uses pulse-width modulation (PWM) to control the output voltage. The voltage is controlled by varying the duty cycle of the PWM signal. The output voltage is determined by the reference voltage, the switching frequency, and the duty cycle of the PWM signal.In linear mode, the MIC4950YFM-TR uses an adjustable voltage reference to set the output voltage. The output voltage is adjusted by changing the current in the reference voltage. This current is controlled by a transistor, thus allowing the user to adjust the output voltage.

Conclusion

The MIC4950YFM-TR is a versatile voltage regulator that is used in a variety of applications. It provides precision voltage control and switching, while offering high efficiency and protection against short circuits, thermal overloads, and overvoltage. It is designed to work in either switching or linear modes, providing the flexibility needed for different applications.

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