BU28UC3WG-TR Integrated Circuits (ICs)

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BU28UC3WG-TR Application Field and Working Principle

BU28UC3WG-TR is a low dropout (LDO) linear voltage regulator. It belongs to the family of PMIC (Power Management IC) voltage regulators, specifically linear voltage regulators. Linear voltage regulators offer an alternative to the mentioned switched-mode voltage regulator types that involve some level of switching action. The integrated circuit is designed to offer high accuracy, fast transient response and good thermal characteristics.

Application Field

BU28UC3WG-TR is typically used in notebook computers, flat panel display (FPD) machines, and telecommunication base stations. It also used in systems with 5V to 7V main supply voltage, such as 12V to 15V input voltage synchronous rectified buck power supplies. It supports a positive output voltage between 5V to 6V while its input voltage range stretches from 4.5V to 7.5V.

Working Principle

The BU28UC3WG-TR works by converting a varying input voltage to a steady output voltage. The output voltage is proportional to the input voltage source (Vin). The integrated circuit contains an adjustable feedback loop that keeps the output voltage in a stable state. This is achieved by comparing the output voltage with an internal reference voltage, which ensures that the output voltage remains steady no matter the load resistance.

The BU28UC3WG-TR employs a voltage regulator (transistor) to achieve its regulation process. This regulator (transistor) is located between the input and output pins, and it functions as a voltage converted. Its output voltage is determined by the value of the reference voltage, which is fed back from the output terminal. The reference voltage is divided by resistors on the board, and these resistors create a resistor divider which allows for an adjustable voltage output based on how the resistor value is configured.

The integrated circuit also provides protection against extreme input voltages by using an over-voltage/under-voltage protection (OVP/UVP). This feature helps guard against damage from sudden voltage spikes or drops, thus protecting the system from unexpected harm. This feature also helps prevent false triggering of the protective system, which could otherwise cause unnecessary trouble-shooting.

Lastly, the BU28UC3WG-TR has a built-in thermal shutdown protection (TSD) feature. This feature helps prevent the IC from exceeding its recommended safe operating temperature, thus prolonging its life. TSD also makes it easier to design a stable, reliable, and efficient system as it helps guard against thermal runaway, which could result in instability or hardware damage.

Conclusion

In conclusion, the BU28UC3WG-TR is a low dropout (LDO) linear voltage regulator integrated circuit, which belongs to the family of PMIC (Power Management IC) voltage regulators. It is designed to offer high accuracy, fast transient response and good thermal characteristics, and is typically used in notebook computers, flat panel display (FPD) machines, and telecommunication base stations. Its regulation process is done via a voltage regulator (transistor), and it also provides protection against extreme input voltages by using an over-voltage/under-voltage protection (OVP/UVP) and a thermal shutdown protection (TSD).

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