MIC4575WT

Voltage - Output (Min/Fixed):	1.23V
Base Part Number:	MIC4575
Supplier Device Package:	TO-220-5
Package / Case:	TO-220-5
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	200kHz
Current - Output:	1.7A (Switch)
Voltage - Output (Max):	20V
Series:	--
Voltage - Input (Max):	24V
Voltage - Input (Min):	4V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck, Buck-Boost
Output Configuration:	Positive
Function:	Step-Down, Step-Up/Step-Down
Part Status:	Active
Packaging:	Bulk

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MIC4575WT is an integrated Pulse Width Modulation (PWM) switch controller, it is a buck switching regulator that incorporates internal 2A switch and up to 90V high-side driving capability, ideal for automotive and eco-efficient single output power management applications.

Application Field and Working Principle

The MIC4575WT is designed for +12V or higher input voltage non-isolated buck switching regulator applications, providing a low-cost, low-noise, low-profile solution output up to 6A, adjustable from1.2 to 6V. It offers multiple features, including wide range of input voltage, constant frequency current mode control, switching frequency up to 2.2MHz, internal SyncFET drive bias, external soft-start and over-current limit, and integrated power-good indicator. The versatile MIC4575WT is suitable for a wide range of applications, from high performance embedded systems to portable power systems and battery chargers.The primary function of the MIC4575WT is to regulate the output of a switching regulator such that the amount of output voltage is less than the input voltage. To do this, the device\'s internal switch is opened and closed to produce a PWM output, which can then be used to control the regulation of the output voltage.The MIC4575WT has a variable switching frequency of up to 2.2MHz and its control loop is calibrated on the fly based on voltage, current and temperature sense feedback signals. This allows the MIC4575WT to achieve high accuracy output voltage regulation. In addition, the device features an internal soft-start circuit and adjustable over-current limit to offer enhanced protection and reliable performance.The MIC4575WT has internal 2A switch, so it can be used in applications with higher output power requirements. Furthermore, the device incorporates an external PWM comparator for adding additional current-mode control for high efficiency and fast transient response applications.To summarize, the MIC4575WT is an integrated, efficient PWM switch controller suitable for a wide range of automotive, single output power management applications. It offers high accuracy output voltage regulation, combination of internal 2A switch and up to 90V high-side driving capability for higher output power applications, and external comparator for additional current-mode control to achieve higher efficiency and fast transient response.

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