ISL6173 Dual Low Voltage Hot Swap Controller is a dual voltage hot swap controller that targets dual voltage hot swap applications across the +2.5V to +3.3V (nominal) bias supply voltage range with a second lower voltage rail down to less than 1V. It features a charge pump for driving external N-Channel MOSFETs, regulated current protection and duration, output undervoltage monitoring and reporting, optional latch-off or retry response, and adjustable soft-start. The current regulation level (CR) for each rail is set by two external resistors and each CR duration is set by an external capacitor on the TIM pin. After the CR duration has expired, the IC then quickly pulls down the associated GATE(s) output turning off its external FET(s). The ISL6173 offers a latched output or indefinite auto retry mode of operation.
The ISL6173 hot‑swap controller targets dual‑voltage applications with a bias supply range of +2.5 V to +3.3 V and a lower rail down to less than 1 V. It features a charge pump for external N‑channel MOSFETs, programmable current‑regulation level and duration, over‑current detection, and selectable latch‑off or auto‑retry response.
The device is supplied in a 5 mm × 5 mm 28‑lead QFN package (also available in MLFP). Detailed pin descriptions, absolute maximum ratings, electrical specifications, and typical performance curves are provided for designers.
| Supply Voltage Range (VBIAS) | +2.5 V to +3.3 V |
|---|---|
| Output Current Rating | 20 mA (short‑circuit protected) |
| ESD Rating (Human Body Model) | 1750 V |
| Package Type | 28‑lead QFN 5 mm × 5 mm (also MLFP) |
The device operates from +2.5 V to +3.3 V nominal bias supply voltage.
It is offered in a 28‑lead 5 mm × 5 mm QFN package and a micro‑lead‑frame plastic (MLFP) package.
The output current is limited to 20 mA and is short‑circuit protected.
The device is rated for 1750 V Human Body Model and 125 V Machine Model ESD.