The LM3525 provides Universal Serial Bus standard power switch and over-current protection for all host port applications. The single port device is ideal for Notebook PC and Handheld PC applications that supply power to one port.
A 1 ms delay on fault flag output prevents erroneous overcurrent reporting caused by inrush currents during the hot-plug events.
The LM3525 accepts an input voltage between 2.7V and 5.5V allowing use as a device-based inrush current limiter for 3.3V USB peripherals, as well as Root and Self-Powered Hubs at 5.5V. The Enable input accepts both 3.3V and 5.0V logic thresholds.
The small size, low RON, and 1 ms fault flag delay make the LM3525 a good choice for root hubs as well as ganged power control in space-critical self-powered hubs.
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| Product type | Fixed current limit, Power switch |
| Vin (min) (V) | 2.7 |
| Vin (max) (V) | 5.5 |
| Continuous current (max) (A) | 0.5 |
| Current limit (A) | 1 |
| Operating temperature range (°C) | -40 to 125 |
| Enable | Active High, Active Low |
| Number of switches | 1 |
| Current limit accuracy at 1 A | 0.5 |
| Rating | Catalog |
| SOIC (D) | 8 | 29.4 mm² 4.9 x 6 |
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