BU90023NUX-TR Integrated Circuits (ICs)

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The BU90023NUX-TR is a multi-channel, linear and switching synchronous DC/DC voltage regulator controller IC that provides a complete, high efficiency power supply solution. It is the perfect choice for design engineers who are looking for a device with low power consumption, high efficiency and reliable performance. The BU90023NUX-TR can be used in many applications such as computing, automotive, consumer, industrial, medical and more.

Features

• Wide input voltage range: 6 V to 48 V
• Up to 6 independent power channels
• Integrated linear and switching synchronous DC/DC controllers
• No gate drivers required
• Built-in current control to enhance stability
• Integrated PLL synchronization
• High PSRR and low EMI
• Very low start-up current consumption
• Small size: 4 mm x 4 mm, 0.5 mm pitch

Applications

• Portable electronic products
• Automotive
• Notebook computer
• Core supply solutions
• Cellular phones
• PDAs
• Printers
• Consumer electronics
• Industrial motor drives

Working Principle

The BU90023NUX-TR is a multi-channel DC/DC voltage regulator controller IC that employs an advanced switching topology to provide high efficiency and high performance. The device consists of six channels, each of which is capable of providing an output voltage from 0.6V to 5.5V. Each channel also contains a PLL that can be used to synchronize the controller to an external clock signal, allowing multiple controllers to run in parallel and reducing the total power dissipation. The BU90023NUX-TR is designed to maintain excellent line and load regulation, while minimizing the power consumption of the power IC.

The basic principle of operation is that the switching of the output transistor is controlled by a combination of the feedback voltage and the heading voltage of the external inductor. This is done by the internal high speed current control comparator, which is fed with a sampled output voltage and a reference voltage. When the output voltage drops below the reference voltage, the comparator triggers the output transistor to turn on and provide current to the output. Conversely, when the output voltage reaches the reference voltage, the comparator causes the output transistor to turn off, thereby stopping the flow of current from the inductor.

The BU90023NUX-TR also has safety features such as overvoltage protection, current limit protection, and overtemperature protection that ensure reliable operation. In addition, it has a Power Enable pin that allows the user to switch on/off the device. This feature can be used to reduce the quiescent current of the system by completely disabling the controller when it is not needed.

Conclusion

The BU90023NUX-TR is a versatile, high performance and efficient DC/DC voltage regulator controller IC. It is suitable for multiple applications such as portable electronics, automotive, notebook computers, core supply solutions, cellular phones, PDAs, printers, consumer electronics, and industrial motor drives. The device has a wide input voltage range, up to 6 independent channels, integrated linear and switching synchronous controllers, integrated PLL synchronization, and several other features that make it a reliable power supply solution.

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