MIC38HC43-1BM-TR

Frequency - Switching:	--
Base Part Number:	MIC38HC43
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:	Discontinued at Digi-Key
Packaging:	Tape & Reel (TR)

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DC-DC Switching Controllers Explained

A DC-DC switching controller is a type of voltage regulator, often referred to as a PMIC (power management integrated circuit). This kind of device is used to convert one DC voltage to another, or to reduce the frequency of the voltage source, in order to create a stable output voltage. The MIC38HC43-1BM-TR is a high-current, high-speed synchronous buck controller designed to provide precision regulation of the output voltage.

What is a DC-DC Switching Controller?

A DC-DC switching controller is a type of voltage regulator that allows a DC voltage source to be converted or stepped down to a predetermined and/or adjustable, lower voltage. This adjustment can be done using an external control voltage or current source. The DC-DC switching controller circuitry is responsible for generating the appropriate switching signals which are then used to drive the power MOSFETs or transistors that drive the load.

How Does a DC-DC Switching Controller Work?

The operation of a DC-DC switching controller is dependent on the buck converter operation. A buck converter converts a higher DC voltage to a lower DC voltage. This is achieved by periodically turning the buck converter switch (MOSFET or transistor) “on” and “off”, which regulates the current flow. The DC-DC switching controller circuitry is responsible for generating the pulses that control these switching signals. The switching frequency of the DC-DC switching controller is an important parameter that affects the output voltage of the device. Generally, a higher switching frequency will result in a faster response and better settling of the output voltage. The MIC38HC43-1BM-TR is an example of a high-current, high-speed synchronous buck controller, which allows for a maximum switching frequency of 600 kHz.

What is the MIC38HC43-1BM-TR?

The MIC38HC43-1BM-TR is a high-current, high-speed synchronous buck controller that can operate over a wide input voltage range (from 4.5 V to 14 V). This capability is particularly useful for applications that have a large range of input voltages, such as automotive applications. The MIC38HC43-1BM-TR is capable of providing a maximum output current of 25A, making it a good choice for high power applications. The MIC38HC43-1BM-TR includes several features that make it well suited for automotive applications. One of these features is a high-side current-sense circuit, which allows for greater precision in controlling the output current. This controller also includes protection features, such as under-voltage lockout, external enable/disable, and over-temperature protection.

Applications of the MIC38HC43-1BM-TR

The MIC38HC43-1BM-TR is designed to provide stable and precise regulation of the output voltage and is thus suitable for a wide range of applications. It is particularly useful in automotive applications that require high current, high speed switching and precision regulation. Other applications include 5V to 12V power conversion, 5V to 1.8V power conversion, and low and high voltage battery-charging applications.

Conclusion

DC-DC switching controllers are a type of voltage regulator that provide advanced control capabilities over power conversion, allowing a wide range of input voltages to be converted and regulated to a specific output voltage. The MIC38HC43-1BM-TR is a high-current, high-speed synchronous buck controller designed specifically for automotive applications and is capable of providing precision regulation of the output voltage. The MIC38HC43-1BM-TR is suitable for a wide range of applications, including 5V to 12V power conversion, 5V to 1.8V power conversion, and low and high voltage battery-charging applications.

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