L5987ATR

Voltage Regulators - DC DC Switching Regulators Overview

The L5987ATR is a step-down switching regulator manufactured by STMicroelectronics, featuring an embedded Power MOSFET with a minimum current limit of 3.5 A to deliver up to 3 A DC output current. It operates with an input voltage range of 2.9 V to 18 V and provides an adjustable output voltage from 0.6 V to VIN. The device includes an internal 250 kHz oscillator that can be externally adjusted up to 1 MHz. Packaged in an 8-pin HSOP with an exposed pad, it supports surface mount installation and functions within a junction temperature range of -40°C to 150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 3.5 A current-limited Power MOSFET for high-current load delivery
• Features an internally fixed 250 kHz oscillator with external programmability up to 1 MHz
• Supports low dropout operation via 100% duty cycle capability
• Includes internal soft-start and inhibit functions for controlled startup

Voltage Regulators - DC DC Switching Regulators Applications

• Step-down switching regulators for general power management
• Power supply systems requiring 3.3 V bus compatibility
• Automotive and industrial applications demanding high reliability

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific package variant, as the L5987 family includes both VFQFPN and HSOP options. Confirm the trailing suffix matches the required tape and reel configuration for automated assembly. Ensure the design accounts for the exposed pad thermal requirements associated with the HSOP-8EP package to maintain optimal thermal performance under full load conditions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a monolithic buck converter solution is required with integrated power switching capabilities. It is suitable for designs needing wide input voltage flexibility down to 2.9 V. Consider the thermal dissipation characteristics of the HSOP package if operating near maximum current limits or ambient temperatures.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the L5987 series of 3 A step-down switching regulators from STMicroelectronics. The series is designed for automotive and industrial applications, offering high reliability and performance. The L5987ATR specifically denotes the version packaged in tape and reel format, facilitating high-volume surface mount production processes.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The L5987A is the tube-packaged equivalent of this component. Verify pinout and electrical specifications remain identical before substitution. No other direct cross-references are documented in the provided source material.