The ADM1070 is a hot swap controller chip for 48V. It allows safe board insertion and removal from a live 48V backplane. Its features include programmable current limit, overvoltage/undervoltage detection, timeout limit, auto-restart and more.
The ADM1070 negative‑voltage hot‑swap controller enables safe board insertion and removal from a live –48 V backplane. It provides programmable linear current limiting, fault‑retry logic, and single‑pin undervoltage/overvoltage detection. The device operates typically from –36 V to –80 V and can tolerate transients up to –200 V.
The controller is supplied in a compact 6‑lead SOT‑23 package, includes an on‑chip timer for programmable timeout and filter functions, and offers ESD protection. Detailed specifications, pin functions, and performance curves are provided for design integration.
| Maximum Voltage Range | -200 V |
|---|---|
| Typical Operating Voltage Range | -77 V to -36 V |
| Undervoltage Falling Threshold (UV) | 0.81 V |
| Overvoltage Rising Threshold (OV) | 1.97 V |
| Maximum Current Limit On Time | 10 ms to 18 ms (depending on timer pin) |
| Continuous Short‑Circuit Time before Shutdown | 2.1 s to 3.5 s |
| Package | 6‑Lead SOT‑23 (RT‑6) |
It typically operates from –36 V to –80 V and can tolerate transient voltages up to –200 V.
The controller allows up to seven consecutive auto‑restarts; after that it latches and shuts down.
The ADM1070 is supplied in a 6‑lead SOT‑23 surface‑mount package.
Yes, it has a single‑pin UV/OV detection circuit with programmable thresholds.