L6985F

Voltage Regulators - DC DC Switching Regulators Overview

The L6985F is a monolithic synchronous step-down switching regulator from STMicroelectronics, designed for high-efficiency power conversion in portable and industrial applications. It integrates two N-channel MOSFETs to minimize external component count and reduce solution size. The device operates with an input voltage range of 2.7V to 16V, supporting output voltages as low as 0.8V. It features a fixed switching frequency of 1MHz, allowing the use of small inductors and capacitors. The regulator provides programmable current limiting and thermal protection, ensuring robust operation under varying load conditions.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification using dual N-channel MOSFETs for enhanced efficiency
• Fixed 1MHz switching frequency enabling compact passive component selection
• Built-in soft-start mechanism to limit inrush current during startup
• Comprehensive protection suite including over-current, thermal shutdown, and undervoltage lockout

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronics requiring efficient battery-powered regulation
• Industrial control systems needing stable low-voltage rails
• Communication equipment utilizing point-of-load conversion
• Embedded systems with strict space constraints

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'F' indicates the correct tape and reel packaging configuration when ordering. Confirm that the operating temperature range meets your environmental requirements. Ensure compatibility with your PCB layout guidelines regarding thermal pads and ground plane connections. Cross-reference the datasheet revision date to ensure access to the latest electrical characteristics and application notes.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Choose this component when high efficiency at moderate currents is required without adding external diodes. The integrated MOSFETs simplify design compared to asynchronous alternatives. Consider the 1MHz frequency trade-off between component size and electromagnetic interference. Verify that the input voltage range aligns with your system's power source variations.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to STMicroelectronics' L6985 family of synchronous buck converters. It shares core architecture with other variants differing primarily in packaging or temperature grades. The family targets applications demanding high power density and reliability. Understanding the broader family helps in selecting alternative packages if lead times or availability change.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other L6985 variants with different suffixes indicating package type or temperature range. Check pin-to-pin compatibility before substitution. Ensure replacement parts maintain the same switching frequency and control loop characteristics to avoid stability issues.