RT8060GB

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The RT8060GB is a buck-boost DC/DC switching converter designed for battery powered systems with wide operating voltage range. When the input voltage is lower than the designated output voltage, it works like a step-down regulator. Conversely, when the input voltage is higher than the designated output voltage, it works like a step-up regulator. It also has a low quiescent current and light load efficiency, making it a great choice for applications powered by batteries.

It features a wide operation voltage range of 2.7V to 10V (direct full scale) and an output voltage range of 0.9V to 5.5V. The typical operating temperature range goes from -40C to 85C. The RT8060GB provides a maximum output current of 1A. Its high ripple rejection ratio of 72dB provides a clean output voltage. Built-in protection features like over-current protection, thermal shutdown, and short-circuit protection guarantee the RT8060GB\'s reliability and stability.

How it works

At the heart of the RT8060GB lies a pulse width modulation (PWM) control circuit that regulates the output voltage. Inside, a high-side N-MOSFET is used to enable the output voltage, while a low-side N-MOSFET is used to discharge the output capacitor. The PWM signal is fed to the high-side switch by a signal driver IC. The signal driver\'s output depends on a voltage divider that is regulated by the feedback signal. This feedback signal is compared with an internal reference voltage, providing the signal driver with a stable output and allowing the RT8060GB to maintain a constant output voltage.

The RT8060GB also features a low dropout linear regulator. It works by setting the Gate voltage of a P-MOSFET with a resistive divider. This P-MOSFET acts as a variable resistor, allowing the voltage across a load connected to the output capacitor to be varied. The linear regulator works together with the PWM circuit to provide a fast line/load transient response.

Application Field and Usage

The RT8060GB provides an efficient solution for applications such as portable battery-powered equipment, portable medical devices, and automotive systems. It is compatible with Li-Ion batteries and NiMH batteries. It can also provide power to LED displays and Microprocessor based systems. The RT8060GB is also an excellent choice for applications where low power consumption is necessary.

Conclusion

The RT8060GB is a compact, high-efficiency DC/DC switching regulator that can operate in both buck and boost mode. It features low quiescent current, high ripple rejection ratio, wide input voltage range, built-in protection features, and a low dropout linear regulator. This makes the RT8060GB a great choice for battery-powered equipment and portable medical devices.

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