LM2587SX-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2587SX-12 is a SIMPLE SWITCHER step-up/flyback regulator from Texas Instruments. It operates with an input voltage range of 4V to 40V and provides a fixed 12V output. The device features a 5A internal switch rated for 65V breakdown. Key electrical parameters include a switching frequency of 100kHz, a maximum load regulation of 20mV, and a quiescent current of 11mA. It supports operation between -40°C and +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated 5A NPN power switch capable of handling 65V voltage stress
• Current-mode control architecture for improved transient response and line regulation
• Internal soft-start circuitry to minimize inrush current during startup
• Built-in thermal shutdown and current limiting for robust protection

Voltage Regulators - DC DC Switching Regulators Applications

• Flyback converter designs requiring wide input voltage ranges
• Boost converters for battery-powered systems
• Positive-to-positive or negative-to-positive DC/DC conversion stages
• Pre-regulation stages for multi-output power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'SX' against official Texas Instruments documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with TO-263 (DPAK) footprint requirements. Confirm RoHS compliance status via the manufacturer's datasheet before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12V output is required from a variable 4V to 40V source. The 100kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the thermal performance of the TO-263 package under high-load conditions and ensure adequate PCB copper area for heat dissipation.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2587 family of monolithic integrated circuits designed for flyback, boost, and forward converter applications. The series offers simplicity with minimal external components. Variants include adjustable versions and other fixed voltages like 3.3V and 5.0V, sharing the same core control logic and protection features.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2587S-12/NOPB: Direct equivalent with standard tube packaging instead of tape-and-reel.