National Semiconductor LM3526 Dual Port USB Power Switch and Over-Current Data Manual
Summary
The LM3526 is a robust dual-port USB power switch providing essential switching and over-current protection for stable USB 1.1/2.0 operation. This low-resistance module ensures reliable power management by handling hot-plug events, detecting in-rush currents, and preventing voltage drops across multiple ports. It is the perfect solution for embedded hardware developers creating root hubs, monitor stations, or sophisticated self-powered devices that require comprehensive PC power control and protection.
Manual Details
| Brand | National |
|---|---|
| Pages | 12 |
| File Size | 749.37 KB |
| Published | June 01, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
What voltage range is required to operate the LM3526?
The operating supply voltage must be between 2.7V and 5.5V.
How does this dual port device protect against power spikes?
It features a 1A nominal short circuit current protection and uses a 3.2A over-current threshold.
What specialized protections does the LM3526 offer internally?
The device has a dual stage thermal protection circuit for individual switch safety, plus UL recognized hot-plug filtering.
What specific USB hub applications are recommended for this component?
It is suitable for Universal USB Root Hubs, monitor hubs, and self-powered high-current limiting devices.