L5987A

PMIC - Voltage Regulators - DC DC Switching Regulators

The L5987A is a DC-DC converter that is part of STMicroelectronics\' Power Management Integrated Circuits (PMIC). DC-DC switching converters are used to independently regulate the voltage being supplied to an electronic device while also providing electrical isolation. The L5987A offers an efficient, low noise, cost-effective solution for a wide variety of applications including but not limited to automotive, industrial, industrial-grade computers and medical applications.

The L5987A features a synchronous rectification structure that uses a buck topology with the goal to optimize efficiency, stability and fast load transient performance. It can achieve up to 95.1% conversion efficiency, making it suitable for applications with tight efficiency requirements and tight power budgets such as USB 3.0 power supplies and notebook power management.

The L5987A is capable of supplying high output currents up to 4.5A, and is configurable with a variety of output voltage options, up to 28V. It supports a wide input voltage range of 4.5V to 28V, ideal for automotive and other industrial applications. The integrated voltage loop allows for quick and easy in-system programming of the output voltage, with very low voltage and current ripple. With its fast response time, the L5987A can handle harsh transient conditions commonly experienced in automotive, industrial, and medical applications.

Additionally, the L5987A also incorporates both over-current protection and over-temperature protection. Over-current protection is provided by monitoring the peak of the current flowing through the inductor, while over-temperature protection is provided by monitoring the internal temperature of the device. The over-current protection will disable the output during an over-current event and then reset once the current is reduced below the threshold.

The physical size of the L5987A is 4.8mm x 5.4mm x 1.6mm, allowing for efficient placement on a printed circuit board. The L5987A also features an integrated soft-start mechanism that reduces input inrush current during turn-on, reducing stress on power supplies due to high peak currents. The integrated soft-start also allows for optimal efficiency across a wide range of input voltages.

Overall, the STMicroelectronics L5987A is an efficient, low noise, and cost-effective DC-DC converter that is ideally suited for a variety of applications. With its wide input voltage range, high output current capability, and wide output voltage range, it is a robust and reliable solution for automotive, industrial, industrial-grade computer, and medical applications.