The LM3526 is a dual-port USB power switch and over-current protection, which is compatible with USB1.1 and USB 2.0 standards, and has 1ms fault flag delay, low RON and 500mA minimum continuous load current.
The LM3526 provides a universal serial bus (USB) power‑switch and over‑current protection for dual‑port host applications such as notebook and desktop PCs. It features a 1 ms fault‑flag delay to filter hot‑plug events, dual‑stage thermal shutdown, and under‑voltage lockout (UVLO) at about 1.8 V. The device operates from 2.7 V to 5.5 V and delivers a minimum continuous load current of 500 mA per port, with a low standby current of 1 pA.
Typical applications include USB root hubs, monitor hubs, self‑powered hub devices and high‑power USB peripherals that require in‑rush current limiting. The LM3526 is offered in an SO‑8 package, with ordering options for active‑high (LM3526M‑H) or active‑low (LM3526M‑L) enable pins, and supports up to 140 mΩ on‑resistance and 200 µA operating current.
| Input voltage range | 2.7 V to 5.5 V |
|---|---|
| Continuous load current (minimum) | 500 mA per port |
| Standby current | 1 pA max |
| Under‑voltage lockout threshold | 1.8 V typical |
| Fault flag delay | 1 ms |
| Package type | SO‑8 |
The fault flag is delayed by 1 ms to filter out spurious hot‑plug events.
It operates from 2.7 V up to 5.5 V.
Each port can supply a minimum of 500 mA continuous load current.
The device is offered in a small SO‑8 surface‑mount package.