MIC2590B-2YTQ-TR

MIC2590B-2YTQ-TR Application Field and Working Principle

The MIC2590B-2YTQ-TR is a high temperature operating range, hot swap, dc-to-dc switching regulator from Micrel, Inc. It is part of their MIC2590-2Y family and is designed to provide high-current power for safely hot-swapping loads into a live system for continuous operation.

The MIC2590B-2YTQ-TR is capable of providing up to 4.5A of peak current and 3.2A of continuous current, with a maximum output voltage of 6V. It is supplied in a thermally enhanced DFN-6 package and is ideal for use in systems operating in high temperature environments such as automotive and industrial applications. The MIC2590B-2YTQ-TR can operate from input voltages of 4.5V to 12V and has a typical efficiency of 95%.

The MIC2590B-2YTQ-TR has built-in safety features such as over-voltage, over-current protection, short circuit protection, reverse current blocking and thermal protection. It has an internal power MOSFET switch and integrated soft-start and thermal shutdown circuitry, which provides reliable protection from over-current and circuit damage. The MIC2590B-2YTQ-TR is also RoHS and Halogen Free, making it environmentally friendly.

The Working Principle of the MIC2590B-2YTQ-TR

The MIC2590B-2YTQ-TR uses an inductive-based, buck-boost topology to convert the input voltage to an adjustable output voltage. This prevents the hot swap controller from needing an additional voltage converter to step up or step down the output voltage. The controller is capable of operating from 4.5V up to 12V, but the output voltage can be set to any level within that range using external resistors.

The controller employs a switch-mode power conversion technique, which reduces input ripple and increases efficiency. This technique uses an internal switching MOSFET to alternately turn on and off the input voltage, creating a pulsed current in the output. The frequency of the pulse is controlled by an internal oscillator.

The MIC2590B-2YTQ-TR also employs an inductor in the circuit to store the energy from the input and release it during the off times. This helps to reduce the amount of ripple on the output and makes the controller more efficient. The controller also features adjustable soft-start and thermal shutdown circuitry to prevent overloads, as well as reverse current blocking and over-voltage protection.

Conclusion

In conclusion the MIC2590b-2YTQ-TR is a high temperature operating range, hot swap, dc-to-dc switching regulator that provides up to 4.5A of peak current and 3.2A of continuous current, with a maximum output of 6V. The controller uses an inductive-based switch-mode power conversion to reduce the input ripple and increase efficiency. It is capable of working from input voltages of 4.5V to 12V and features numerous safety features, such as reverse current blocking and thermal protection. The MIC2590B-2YTQ-TR is ideal for use in systems operating in high temperature applications and is environmentally friendly.