STMicroelectronics

L7985

L7985 Description

The L7985 from STMicroelectronics is a high-efficiency 2A adjustable buck (step-down) DC-DC switching regulator designed for demanding power management applications. With an input voltage range of 4.5V to 38V and an adjustable output voltage from 0.6V to 38V, it offers exceptional flexibility for a wide array of systems. The device operates at a switching frequency range of 250kHz to 1MHz, enabling designers to optimize efficiency and component size. Packaged in a 10VFQFPN tube, the L7985 is RoHS3 compliant and REACH unaffected, ensuring adherence to environmental regulations. Its non-synchronous rectification topology simplifies design while maintaining robust performance.

L7985 Features

• Wide Input/Output Range: Supports 4.5V–38V input and 0.6V–38V output, ideal for automotive, industrial, and battery-powered systems.
• High Current Output: Delivers up to 2A continuous current with stable regulation.
• Adjustable Frequency (250kHz–1MHz): Enables trade-offs between efficiency and external component size.
• Compact & Robust: Surface-mount 10VFQFPN package with MSL3 (168 hours) moisture sensitivity, suitable for automated assembly.
• Compliance & Reliability: RoHS3 and REACH compliant, meeting stringent environmental and safety standards.
• Non-Synchronous Buck Topology: Simplifies design while maintaining high efficiency (up to 90% under optimal conditions).

L7985 Applications

The L7985 excels in applications requiring high-efficiency voltage conversion with wide input ranges:

• Automotive Systems: Powering infotainment, ADAS, and sensors from 12V/24V batteries.
• Industrial Equipment: Regulating voltage for PLCs, motor drives, and IoT edge devices.
• Portable Electronics: Efficiently stepping down battery voltages (e.g., Li-ion) for microcontrollers and FPGAs.
• Telecom Infrastructure: Providing stable power to RF modules and baseband processors.

Conclusion of L7985

The L7985 stands out as a versatile, high-performance buck regulator, combining wide voltage range, adjustable frequency, and compact packaging. Its 2A output capability and industrial-grade robustness make it superior to fixed-frequency or lower-current alternatives. Whether for automotive, industrial, or portable designs, the L7985 delivers reliable power conversion with minimal external components, reducing BOM complexity and cost. Engineers seeking a balance of flexibility, efficiency, and compliance will find it an optimal choice for modern power systems.