MIC38C43-1YM-TR

Frequency - Switching:	500kHz
Base Part Number:	MIC38C43
Supplier Device Package:	14-SOIC
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Frequency Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	96%
Series:	--
Voltage - Supply (Vcc/Vdd):	7.6 V ~ 20 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck, Boost, Flyback, Forward Converter
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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MIC38C43-1YM-TR Application Field and Working Principle

Introduction

The MIC38C43-1YM-TR (also known as MIC38C43-1YM) is a buck controller designed and manufactured by Microchip Technology. This single-phase synchronous buck switching regulator is designed to provide up to 20 amps of continuous output current with a switching frequency of up to 250kHz. It is capable of a maximum input voltage of 24V, and can be used to control the output voltage of a buck converter. In addition to providing good efficiency and power dissipation, the MIC38C43-1YM-TR also has built-in features such as under-voltage lockout (UVLO), and temperature-compensated oscillator operation for improved stability.

Application Field and Features

The MIC38C43-1YM-TR is suitable for a wide variety of applications, including automotive, industrial, telecom and consumer products. Its high efficiency and lower power dissipation make it a good choice for applications where conserving power is important. One of the more prominent features of the MIC38C43-1YM-TR is its built-in overcurrent protection (OCP). This allows for current protection of the switching regulator for an application, limiting the current output of the device to a safe level. Other features includes under-voltage lockout (UVLO) protection, output voltage overcurrent protection (OVP), and pulse-by-pulse current limiting.

Working Principle

The MIC38C43-1YM-TR uses a synchronous buck switching architecture to convert an input voltage of up to 24V to an output voltage. It utilizes a MOSFET switch to control the output power by switching the input voltage, as it is applied to the load, on and off. The MOSFET switch is controlled by a PWM signal, which determines the duty cycle of the switch. The duty cycle, in turn, determines the amount of output power that is delivered to the load. The PWM signal is generated by the MIC38C43-1YM-TR.The MIC38C43-1YM-TR also has a built-in overcurrent protection (OCP) feature. When the output current exceeds a pre-determined limit, the output is disabled and a fault is signaled. This allows the user to monitor the regulator system for excessive current, ensuring that the load connected to the regulator is not damaged.The MIC38C43-1YM-TR also includes a temperature-compensated oscillator for improved stability. This is achieved by adjusting the internally generated clock in response to variations in temperature. The MIC38C43-1YM-TR also has a built-in undervoltage lockout (UVLO) feature. This allows for preventing the regulator from operating below a pre-determined input voltage.

Conclusion

The MIC38C43-1YM-TR is an excellent choice for a wide variety of applications requiring a buck switching regulator. It offers good efficiency and excellent power dissipation, while providing a high level of protection against overload and low voltage conditions. In addition, its built-in overcurrent protection (OCP) and temperature compensated oscillator (TCO) provide excellent system stability and improved load regulation. With its wide input range and high current rating, the MIC38C43-1YM-TR is an ideal buck controller for a wide range of industrial and consumer applications.

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