MIC2179-5.0BSM

Voltage - Output (Min/Fixed):	5V
Base Part Number:	MIC2179
Supplier Device Package:	20-SSOP
Package / Case:	20-SSOP (0.209", 5.30mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	200kHz
Current - Output:	1.5A
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Part Status:	Obsolete
Packaging:	Tube

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MIC2179-5.0BSM Application Field and Working Principle

The MIC2179-5.0BSM DC-DC switching regulators belong to the family of PMIC (Power Management ICs). It is an advanced and efficient DC-DC step-down regulator IC with wide Vin (input voltage) range, small footprint and low power consumption. Specifically, it is designed to perform low noise, low ripple, Proportional-Integral-Derivative (PID) regulation and is ideal for automotive, industrial and communication applications.

Features:

• Wide input voltage range from 4.5V to 28V, supports both linear and switching mode power supplies
• Output voltage adjustable from 0.6V to 28V
• Multi-mode operation: Pulse Width Modulation (PWM), Pulse Frequency Modulation (PFM) or PWM/PFM step-down
• High switching frequency up to 1MHz
• Optimal trade-off between transient performance and power consumption
• Small PCB footprint (5mm x 7.5mm)
• High output current capability up to 3A
• High PSRR (Power Supply Rejection Ratio) up to 65dB at switching frequency
• Low supply current, < 1uA
• Auto-restart function from short-circuit or over-temperature conditions

Applications:

• Automotive power applications
• Industrial equipment
• Communication systems
• Battery operated systems
• Portable electronics

Working Principle

The MIC2179-5.0BSM is a high-performance DC-DC switching regulator IC designed to efficiently step-down an input voltage to a lower output voltage. It provides an optimal trade-off between transient response and power consumption with a wide input voltage range, high switching frequency and adjustable output voltage up to 28V.The MIC2179-5.0BSM has a certain hysteresis in the PFM/PWM switching mode, which regulates the output voltage. The input voltage is compared to the reference voltage. When the input voltage is higher than the reference voltage, the average output voltage will increase due to its PWM mode operation. When the input voltage is lower than the reference voltage, the MIC2179-5.0BSM will enter its PFM mode. This causes the average output voltage to decrease. The output voltage will remain stable at this level until the input voltage rises again, thus completing the regulation process.The MIC2179-5.0BSM also features an auto-restart function that protects the IC from fault conditions like short-circuits and over-temperature conditions. This is achieved by monitoring the temperature and output current of the IC. If either of these conditions exceed the designed limit, the IC will shut down the output voltage and return to the normal operation mode once the fault condition has been cleared.In summary, the MIC2179-5.0BSM is a high-performance DC-DC switching regulator IC designed for automotive, industrial and communication applications. It has a wide input voltage range, high switching frequency and adjustable output voltage up to 28V. Its low power consumption and auto-restart function make it an ideal choice for many power management applications.

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