BD2045AFJ and BD2055AFJ are ROHM's high side switch ICs for USB devices and memory cards. They feature over current protection, soft start, reverse-current protection when power switch off, etc.
The BD2045AFJ and BD2055AFJ are single‑channel high‑side switch ICs designed for USB power lines. They integrate an N‑channel MOSFET with low on‑resistance, over‑current detection, thermal shutdown, under‑voltage lockout, soft‑start and reverse‑current protection. Typical applications include USB hubs, consumer appliances, car accessories and PC peripherals.
The document provides detailed electrical characteristics, pin descriptions, block diagrams, timing diagrams and ordering information. Absolute maximum ratings, operating conditions and typical performance curves are listed, along with recommended circuit examples for designers.
| Continuous current load | 0.25 A |
|---|---|
| Supply voltage range | 2.7 V to 5.5 V |
| On‑resistance (Ron) | 80 mΩ |
| Standby current (IDD standby) | 10 µA max |
| Operating temperature range | -40 °C to 85 °C |
The BD2045AFJ uses an active‑low control input.
The typical rise time is 1.2 ms.
The device can operate up to 5.5 V supply voltage.