L5986

Voltage Regulators - DC DC Switching Regulators Overview

The L5986 is a step-down switching regulator featuring an embedded Power MOSFET with a minimum current limit of 3.0 A, delivering up to 2.5 A DC output current. It supports an input voltage range from 2.9 V to 18 V and provides an adjustable output voltage starting from 0.6 V. The device includes an internal 250 kHz oscillator that can be externally adjusted up to 1 MHz. Available in VFQFPN 3x3 mm-8L and HSOP8 packages with exposed pads, it offers thermal resistance (RthJA) down to 60 °C/W and 40 °C/W respectively.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Low dropout operation enabling 100% duty cycle for minimal voltage drop
• Internal soft-start and inhibit functions for controlled startup and shutdown
• Voltage feedforward capability for improved transient response
• Integrated overcurrent and thermal protection mechanisms

Voltage Regulators - DC DC Switching Regulators Applications

• Systems requiring a 3.3 V bus supply
• General-purpose DC-DC conversion applications
• Embedded power management designs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific package variant required, as the L5986 is available in both VFQFPN and HSOP configurations. Confirm the operational status of the selected part number, as some variants may be discontinued or have limited availability. Ensure compatibility with the target PCB footprint and thermal requirements before finalizing procurement decisions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact solution is needed for buck conversion with high efficiency. The exposed pad packages facilitate effective heat dissipation. Consider the programmable switching frequency if noise synchronization with other system clocks is necessary. Verify that the input voltage range aligns with the source supply characteristics.

Voltage Regulators - DC DC Switching Regulators Part Context

The L5986 belongs to STMicroelectronics' portfolio of monolithic buck converters and step-down switching regulators. These devices are designed for high reliability and performance in automotive and industrial applications. The series emphasizes low external component counts and robust protection features for demanding environments.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for direct pin-compatible alternatives within the same manufacturer's lineup if the L5986 is unavailable. Ensure any substitute maintains the 2.5 A output current capability and similar input voltage range. Verify that thermal performance metrics remain adequate for the intended application.