MIC2590B-5BTQ

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PMIC, short for Power Management Integrated Circuits, are robust integrated circuits designed to manage the power flow in most modern electronic systems. Hot Swap Controllers, a subcategory of PMICs, serves to protect the load from nasty conditions like any accidental surge in power and irregular load conditions. MIC2590B-5BTQ, a Hot Swap Controller from Microchip, is an integral part of power systems in various types of applications.

The MIC2590B-5BTQ is a 5A Hot Swap Controller with integrated MOSFET and gate driver. It features a precision threshold voltage of 4.39V, programmed using a single resistor. It also features an OVP (Over-Voltage Protection) up to 27V, monotonic start up, current limit protection and an adjustable UVLO (Under-Voltage Lockout) voltage. The device offers a thermal shutdown protection which protect the device and the load from temperature in excess of 165°C (Junction Temperature).

Furthermore, the MIC2590B-5BTQ supports Gate Emitter (GE) and Bootstrap (BS) gate drive circuits. The device incorporates two separate power supply inputs that allow powering the gate drive section and the controller section independently. This eliminates any issues arising due to noise or ringing in the power supply. Another important feature is the capacitive and resistive load auto-detection circuit, which when enabled, automatically detects the type of load it is connected to and accordingly adjusts its switching characteristics.

The MIC2590B-5BTQ allows for a high degree of design flexibility as it can be configured for a variety of applications. It is widely used in telecom circuit protection, data communication systems, industrial applications, server base stations, and other high-power bus systems. In SunServer 2000-GS08 platform, for instance, the MIC2590B-5BTQ provides the power control required to power up and down the system boards. In a similar fashion, the MIC2590B-5BTQ operates as an electrical circuit breaker or protection device in a fault management system.

The MIC2590B-5BTQ operates on the basic working principle of comparing the voltage of the input power supply and the Dropout inverter V—ref (reference voltage) with a comparator to detect a change in voltage. This enables the MEU2590B-5BTQ to act as a fast switch. It then adjusts the voltage, current, temperature and other parameters according to the conditions of the load and the power supply.

The MIC2590B-5BTQ also incorporates additional safety measures like Reverse Current Protection or “crowbar”, preventing the FET from being driven into the reverse conduction and creating a short circuit between the power supply and the load, and Inrush current limiting, which prevents sudden surges of current during power supply startup. The MIC2590B-5BTQ also has a low quiescent current (< 2uA) which helps in reducing the power consumption.

The MIC2590B-5BTQ provides a wide range of features, making it ideal for a variety of applications, ranging from low end consumer electronics to high end industrial and power applications. Flexible gate drive, voltage and current protection features, along with fast switching and low power consumption ensures that the MIC2590B-5BTQ is the perfect choice for any power applications.

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