L5986ATR

Voltage Regulators - DC DC Switching Regulators Overview

The L5986ATR is a step-down switching regulator manufactured by STMicroelectronics, housed in an 8-pin HSOP EP package with tape and reel delivery. It features a single adjustable output capable of delivering up to 2.5 A DC current, supported by an embedded Power MOSFET with a minimum current limit of 3.0 A. The device operates within an input voltage range of 2.9 V to 18 V, allowing for output voltages adjustable from 0.6 V to the input level. It includes an internal oscillator set at 250 kHz, which can be externally programmed up to 1 MHz. The component supports low dropout operation with 100% duty cycle, incorporates internal soft-start and inhibit functions, and provides overcurrent and thermal protection. It is rated for operating temperatures between -40°C and +150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 3.0 A minimum current-limited embedded Power MOSFET for robust load handling
• Supports low dropout operation achieving 100% duty cycle for efficient voltage conversion
• Features programmable switching frequency adjustable from 250 kHz up to 1 MHz
• Includes internal soft-start and inhibit control for system stability and power management

Voltage Regulators - DC DC Switching Regulators Applications

• Power supply systems requiring 3.3 V bus compatibility
• Embedded applications needing adjustable DC-DC conversion
• Industrial equipment utilizing buck converter topologies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the specific ordering suffix corresponds to the HSOP EP package and tape and reel configuration as documented in the official datasheet. Confirm that the part status remains active with the manufacturer before finalizing procurement plans. Ensure compliance with RoHS directives and check for any specific environmental restrictions applicable to the region of deployment. Cross-reference the pin count and exposed pad requirements with PCB layout guidelines to guarantee proper thermal dissipation and electrical connectivity during assembly.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a high-current buck converter is required with flexible frequency tuning capabilities. The wide input voltage range makes it suitable for various bus architectures, including those derived from 3.3 V sources. Consider the thermal performance characteristics associated with the HSOP EP package if heat dissipation is a critical design constraint. Evaluate the need for external frequency adjustment against the default 250 kHz setting to optimize electromagnetic interference profiles for the specific application environment.

Voltage Regulators - DC DC Switching Regulators Part Context

The L5986ATR belongs to the L5986 family of step-down switching regulators produced by STMicroelectronics. This series is designed for applications demanding high efficiency and compact solution sizes. The ATR suffix denotes the specific packaging variant, distinguishing it from other package options like VFQFPN available within the same functional family. The component serves as a monolithic solution for DC-DC conversion, integrating power switches and control logic into a single chip to minimize external component count.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers are not provided in the source documentation.