ISL6119 is a USB dual port power controller from Intersil that provides fully independent overcurrent (OC) fault protection. This device operates over the +2.5V to +5.5V range and features internal current monitoring, accurate current limiting, integrated power switches and current limited delay to latch-off for system protection. The ISL6119 current sense and limiting circuitry sets the current limit to a nominal 1A, making this device well suited for the USB port power management application. The ISL6119 provides OC fault notification, accurate current limiting and a consistent timed latch-off thus isolating and protecting the voltage bus in the presence of an OC event or short circuit. The 12ms time to latch-off is independent of the adjoining switch’s electrical or thermal condition and the OC response time is inversely related to the OC magnitude. Each ISL6119 incorporates in a single 8 lead SOIC package two 80mΩ N-channel MOSFET power switches for power control. Each switch is driven by a constant current source giving a controlled ramp up of the output voltage. This provides a soft start function to prevent current overshoot.
The ISL6119 is a USB dual‑port power supply controller that provides independent over‑current fault protection for each channel. It features internal current sensing, a 12 ms latch‑off timer, undervoltage lockout, and soft‑start turn‑on to reduce bus voltage droop. The device operates from 2.5 V to 5.5 V and integrates two 80 mΩ N‑channel MOSFET switches in an 8‑lead SOIC package.
Typical applications include USB port power management and general circuit current limiting. The datasheet includes pin descriptions, absolute maximum ratings, electrical specifications, performance curves, and package dimensions, as well as an application note on implementing an autonomous auto‑reset function.
| Operating Voltage Range | 2.5 V to 5.5 V |
|---|---|
| Current Limit per Channel | 1 A (nominal) |
| Fault Latch‑off Time | 12 ms |
| Package Type | 8‑lead SOIC |
| Logic Compatibility | 3.3 V and 5 V logic families |
The device latches off after a 12 ms delay when an over‑current condition is detected.
Each channel limits current to a nominal 1 A.
It operates from 2.5 V to 5.5 V.
It is supplied in an 8‑lead SOIC package.