MIC4950YFL-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:	10-VDFN Exposed Pad
Supplier Device Package:	10-DFN (3x4)
Base Part Number:	MIC4950

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Introduction to MIC4950YFL-TRThe MIC4950YFL-TR is a monolithic integrated circuit (IC) from TI, which is built for performing power supply regulation and voltage control for a wide range of applications. This IC can be used for a variety of electronic including distributed power systems, telecommunications power supplies, automotive power systems, commercial power, and aerospace power system. This chip can be employed for regulating voltage from 1V to 15V, with a minimum load current of 0.5A. It provides protection against short-circuit, over-current and overtemperature conditions.MIC4950YFL-TR Application Field and Working PrincipleThe MIC4950YFL-TR is designed as a DC-DC switching regulator, in which its switching frequency is set by an internal oscillator having an option of precise frequency-setting. The function of the device is to provide precise regulation of the output voltage given a certain tolerance of the supply voltage and load current. It is designed to handle low-power and high-power voltage regulation applications. It is well suited for distributed power systems due to its high efficiency and fast dynamic response.The working principle of the MIC4950YFL-TR power device is based on that of a switched-mode voltage regulator. It uses a low-power device such as a transistor or diode to regulate the output current from the supply voltage source. The input source charges a storage capacitor and a shunt resistor is placed in series with the diode. The output voltage of the regulator is controlled by the charging and discharging of the storage capacitor.To adjust the output voltage or regulation, the MIC4950YFL-TR has variable resistor networks (VRN) which can be used to modify the internal reference voltage, as well as the charging and discharging of the storage capacitor. When the output voltage is required to be higher than the input voltage, the storage capacitor is being used to store the excess voltage. When the output voltage needs to be regulated lower than the input source, the storage capacitor is used as a sink for the current, until the output voltage is regulated to the desired lower value.The MIC4950YFL-TR also has built-in protection features such as over-voltage protection (OVP), under-voltage protection (UVP), over-temperature protection (OTP) and short-circuit protection (SCP), providing a high level of protection against voltage and current distortions.ConclusionThe MIC4950YFL-TR is a monolithic integrated circuit which is designed to be used as a DC-DC switching regulator. It can be employed to regulate voltage from 1V to 15V, with a minimum load current of 0.5A. It offers high efficiency and fast dynamic response, making it suitable for distributed power systems applications. It has variable resistor networks to adjust the output voltage, providing precise regulation of the output voltage. Furthermore, it also provides protection against short-circuits, over-current and overtemperature conditions.

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