L6986H

Voltage Regulators - DC DC Switching Regulators Overview

The L6986H is a synchronous step-down switching regulator from STMicroelectronics, designed to deliver up to 2 A DC output current. It operates with an input voltage range of 4 V to 38 V, supporting standard 5 V, 12 V, and 24 V power supplies. The device features adjustable output voltage from 0.85 V to VIN or fixed options at 3.3 V and 5 V. Key electrical parameters include a quiescent current of 30 µA in Low Consumption Mode (LCM) and 8 µA in shutdown. The switching frequency is adjustable between 250 kHz and 2 MHz. It utilizes a P-channel MOSFET high-side element for 100% duty cycle operation and includes an embedded output voltage supervisor.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Features Low Consumption Mode (LCM) for maximizing efficiency during idle modes and Low Noise Mode (LNM) for constant switching frequency and minimized ripple.
• Includes an embedded output voltage supervisor that manages reset phases for digital loads like microcontrollers and FPGAs.
• Supports output voltage sequencing via the RST open collector output during the power-up phase.
• Utilizes peak current mode architecture with pulse-by-pulse current sensing on both power elements for effective protection.

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial control systems requiring robust power management
• Automotive infotainment and body electronics
• Embedded systems with microcontroller or FPGA logic loads

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix code (e.g., TR for reel, TTR for tape) to confirm packaging type and quantity. Confirm RoHS compliance status through official datasheets as environmental declarations may vary by production batch. Check for End-of-Life (EOL) notifications or Not Recommended for New Designs (NRND) status before finalizing procurement plans to ensure long-term supply stability.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing systems powered by 12 V or 24 V industrial buses requiring high efficiency at light loads. The adjustable switching frequency allows optimization for EMI performance or passive component size. Ensure the application benefits from the integrated supervisor for system reliability. Verify thermal requirements based on the HTSSOP-16 package and expected load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

The L6986H belongs to the L6986 family of synchronous buck regulators. It shares core topology and feature sets with variants such as L6986H5VTR (fixed 5 V output) and L6986H3V3TR (fixed 3.3 V output). The base L6986H part typically denotes the adjustable voltage version within this series, offering flexibility for custom output requirements compared to fixed-output derivatives.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate compatible devices within the same manufacturer's portfolio that offer similar input ranges and current capabilities if obsolescence occurs.