FS85

The FS85 is a high-performance power management IC manufactured by NXP Semiconductors, designed for efficient voltage regulation in compact and energy-sensitive applications. It operates with an input voltage range of 2.7V to 5.5V, making it suitable for battery-powered systems such as portable electronics, IoT devices, and wearables. The device features a low quiescent current of typically 1.5 µA in standby mode, ensuring minimal power loss during idle periods and extending battery life. This regulator employs a synchronous buck topology, which enhances efficiency by reducing power dissipation compared to traditional diode-based solutions. With a maximum output current capability of up to 1.5 A, the FS85 supports dynamic load conditions commonly found in modern microcontroller-based systems. Its integrated MOSFETs provide excellent thermal performance and reduce external component count, simplifying board design and lowering overall system cost. The FS85 includes comprehensive protection features such as over-current protection (OCP), over-temperature shutdown (OTP), and under-voltage lockout (UVLO), ensuring robust operation even under adverse conditions. These protections help safeguard both the IC and the connected circuitry from damage due to electrical faults or environmental stress. Additionally, the device supports soft-start functionality to minimize inrush current during startup, preventing voltage droop on the power rail. Designed for ease of integration, the FS85 comes in a small 3x3 mm QFN package, ideal for space-constrained applications. It offers a fixed output voltage of 3.3 V, though configurable versions may be available depending on the variant. The internal compensation network eliminates the need for external components, streamlining the design process and reducing BOM complexity. Common applications include wireless sensors, smart meters, industrial control modules, and consumer electronics where stable, efficient power delivery is critical. Its combination of high efficiency, small footprint, and built-in safety mechanisms makes it a preferred choice for developers seeking reliable power solutions in next-generation embedded systems.