L5987

Voltage Regulators - DC DC Switching Regulators Overview

The L5987ATR is a step-down switching regulator from STMicroelectronics featuring an embedded Power MOSFET with a minimum current limit of 3.5 A, delivering up to 3 A 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, programmable up to 1 MHz. It utilizes an 8-pin HSOP package with an exposed pad for thermal management.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 3.5 A current-limited embedded Power MOSFET for high-current delivery
• Features an internal oscillator with frequency adjustment capability up to 1 MHz
• Includes internal soft-start and inhibit functions for controlled operation
• Supports low dropout operation with 100% duty cycle capability

Voltage Regulators - DC DC Switching Regulators Applications

• Step-down switching regulator circuits
• Evaluation boards such as EVAL5987 and STEVAL-ISA201V1
• Systems requiring 3.3 V bus compatibility

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix (e.g., ATR) against the datasheet to confirm packaging type, which is Tape and Reel. Confirm the package variant matches the required thermal performance, as HSOP and VFQFPN packages offer different thermal resistances. Ensure the order quantity aligns with the manufacturer's standard packaging requirements.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a buck converter requires an input voltage starting at 2.9 V and an output current up to 3 A. The adjustable switching frequency allows optimization for efficiency or component size. Consider the thermal resistance specifications of the 8-HSOP package if operating near maximum load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

The L5987 is part of STMicroelectronics' portfolio of monolithic buck converters designed for automotive and industrial applications. It belongs to the family of step-down switching regulators that prioritize reliability and performance in power management systems.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The L5987TR is a direct alternative available in a VFQFPN 3 x 3 -8L package with an exposed pad. Verify thermal requirements and PCB layout constraints when substituting between the HSOP and VFQFPN variants.