National Semiconductor - LM2585 Simple Switcher 3A Flyback Regulator User Manual
Summary
This highly integrated switching regulator is a robust 3A power IC designed for reliable flyback, boost, and forward converter applications. It supports multiple fixed and adjustable output voltages while maintaining efficiency across wide input ranges (4V to 40V). The manual provides deep technical specifications, covering electrical performance, line/load regulation metrics, and advanced features like soft-start mode and current limit protection. This component is essential for electrical engineers requiring a cost-effective, high-efficiency solution for complex DC power supply systems.
Manual Details
| Brand | National |
|---|---|
| Pages | 25 |
| File Size | 628.84 KB |
| Published | June 02, 2026 |
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Frequently Asked Questions
What voltage ranges can the LM2585 regulator accommodate?
It supports a wide input voltage range of 4V to 40V and handles an output switch standoff up to ±65V.
How does the unit mitigate power spikes during startup?
The internal soft-start function is utilized to effectively reduce in-rush current during start-up.
What is the maximum rated continuous current capacity?
The power switch is a 3.0A NPN device and is rated for up to 3.0A.
What key protection features are built into this IC?
Protection includes current limit, thermal shutdown, undervoltage lockout, and output transistor limits.