BU90104GWZ-E2 Integrated Circuits (ICs)

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BU90104GWZ-E2 is a DC DC Power IC from ROHM Semiconductors which is a dual stage synchronous switching regulator made to provide a regulated output voltage with selectable ranges of 5.0V, 7.5V, 8.0V and 10.0V. It is usually used in notebooks and mobile phones, and can be used in other consumer electronics appliances. It is also widely used in industrial field.

Application Field

BU90104GWZ-E2 DC DC switching regulator is usually used in notebooks and mobile phones where the power supply load requirements are not very high and the working environment requests low EMI. It is able to provide a regulated output voltage with a selectable range and since its power dissipation is quite low, it is suitable for applications that require higher efficiency. Besides being used in consumer electronics, it is also widely utilized in industrial and motor control equipment as well as in LED lighting systems.

Working Principle

The BU90104GWZ-E2 DC DC switching regulator works in two stages. In the first stage, it operates in DCM (Discontinuous Conduction Mode) and the inductor current starts up and ramps up the output voltage to the target. This is usually done with a low PWM frequency of around 400kHz. In the second stage, the voltage is regulated in a CCM (Continuous Conduction Mode) to reduce core losses and limit noise. Moreover, the switching frequency is also adjustable up to 2MHz.

Further, the BU90104GWZ-E2 switching regulator features a high efficiency switching synchronous buck regulator which supports an output voltage range from 5.0V to 10.0V and is configured with regulated PWM control, frequency synchronizing and an internal fault protection circuit. It also includes an optional soft start and anti-shift functions, as well as surge current control, temperature protection and extended over temperature protection.

Conclusion

In conclusion, the BU90104GWZ-E2 switching regulator is suitable for a range of applications thanks to its adjustable output voltage range and high efficiency. Due to its dual-stage synchronous design, it operates with low power dissipation, high accuracy, and low EMI. Furthermore, it can further be adjusted to provide higher efficiency. All in all, it is a reliable and efficient DC DC switching regulator.

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