L5980

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The L5980 is a monolithic step-down DC/DC switching regulator DC/DC converter designed onto STMicroelectronics’s VIPower M0-7 technology. It belongs to the PMIC (Power Management Integrated Circuit) category, and more particularly to the portfolio of Voltage Regulators, DC DC Switching Regulators. The device utilizes synchronous rectification and Adaptive Voltage Positioning (AVP) technology to achieve an extremely high efficiency, significantly reducing the total power dissipation. It has in addition to these features a wide input voltage range, low power output, adjustable switching frequency and current limit for system flexibility.

The L5980 has a wide 4.5V to 44V input voltage range, while the output is adjustable from 0.8V to 30V with a maximum current of 5A (with a low-dropout voltage of only 0.2V). It has also a high efficiency up to 95%, programmable switching frequencies up to 1MHz, and a wide range of current limit settings. The output voltage and the current limit are both adjustable via an external potentiometer. In addition, the device supports a power save mode, which reduces the current consumption during light loading, thus minimizing the total power dissipation.

The L5980 is also highly integrated, including a low-side power switch, an anti-ringing, over-voltage/short-circuit/under-voltage protection features, a load disconnect, and a thermal shutdown. It is structured as a current-mode switched regulator with minimum external components, hence it operates with extreme accuracy and no load drift at wide load range. This makes it well-suited for the applications demanding high accuracy and system stability like high power switching supplies and accuracy data converters.

At the heart of the L5980 lies its Adaptive Voltage Positioning (AVP) technology, which provides a smooth transition between the PWM mode and the power-saving mode at low loads. This technology dynamically adjusts the output voltage and the current limit settings, thus maximizing the device efficiency and reducing the total power consumption. Furthermore, it also helps to reduce the output voltage ripple, thus providing better system response.

Due to its wide input voltage range, high efficiency, and low-dropout voltage of only 0.2V the L5980 is becoming a popular choice for battery-powered applications. In these systems, the device helps to reduce the total power consumption and thus extend the battery life. IT is also used for various industrial applications such as motor control, lighter and audio equipment as it helps to reduce the noise due to its high operating frequency and low EMI (Electro-Magnetic Interference) emission.

Overall, the L5980 DC/DC switching regulator from STMicroelectronics has wide input voltage range, adjustable output voltage, adjustable current limit settings, programmable switching frequencies and power switch integration, environmental protection and thermal shutdown along with a power-save mode. With all these features and low-dropout voltage it is suitable for battery-powered systems as well as industrial applications demanding high precision.

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