L6986F

Voltage Regulators - DC DC Switching Regulators Overview

The L6986F is a synchronous step-down switching regulator designed to deliver up to 1.5 A DC output current. It operates with an input voltage range of 4 V to 38 V, accommodating standard 5 V, 12 V, and 24 V power supplies. The device features adjustable output voltage from 0.85 V to VIN and supports switching frequencies between 250 kHz and 2 MHz. Key electrical characteristics include a quiescent current of 30 µA in Low Consumption Mode and 8 µA in shutdown mode. Internal resistance values are specified as 180 mΩ for the high-side MOSFET and 150 mΩ for the low-side MOSFET.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Features Low Consumption Mode (LCM) to maximize efficiency at light loads while maintaining controlled output voltage ripple.
• Includes Low Noise Mode (LNM) that ensures constant switching frequency and minimizes output voltage ripple for sensitive applications.
• Integrates an embedded output voltage supervisor with an open-collector RST output for managing reset phases and enabling output voltage sequencing during power-up.
• Utilizes peak current mode architecture with pulse-by-pulse current sensing on both power elements for effective constant current protection.

Voltage Regulators - DC DC Switching Regulators Applications

• Digital load systems requiring microcontroller or FPGA reset management
• Applications demanding low noise operation with minimized output voltage ripple
• Systems utilizing 5 V, 12 V, or 24 V power supply rails
• Compact designs benefiting from high switching frequency capability

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix codes against official STMicroelectronics documentation to confirm package type and temperature grade. Ensure compatibility with required output voltage ranges and switching frequency settings before integration. Cross-reference datasheet revisions to validate pinout consistency and electrical parameter updates for your specific design implementation.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a 1.5 A synchronous buck converter is required within a 4 V to 38 V input range. Consider the L6986F for designs needing integrated output supervision and sequencing capabilities without external components. Evaluate the trade-off between Low Consumption Mode efficiency and Low Noise Mode performance based on specific load profiles and electromagnetic interference constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

The L6986F belongs to the L6986 series of monolithic switching regulators manufactured by STMicroelectronics. This family focuses on providing high efficiency and compact solutions for step-down conversion tasks. The device integrates P-channel MOSFETs to enable 100% duty cycle operation, distinguishing it from N-channel alternatives in similar voltage ranges.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult official STMicroelectronics documentation for potential cross-references or updated series replacements.