The ADM1186 is a quad voltage up and down sequencer and monitor with programmable timing, which can be powered from 2.7 V to 5.5 V on the VCC pin, monitors four supplies via 0.8% accurate comparators, and supports up and down supply sequencing.
The ADM1186‑1 and ADM1186‑2 are integrated four‑channel voltage monitoring and sequencing devices that operate from a 2.7 V to 5.5 V supply. They provide programmable up‑ and down‑sequencing, open‑drain enable outputs, a power‑good output, and a fault pin for safe power‑rail management.
The document includes functional descriptions, pin configurations, timing diagrams, absolute maximum ratings, and detailed electrical specifications for both the 20‑lead QSOP (ADM1186‑1) and 16‑lead QSOP (ADM1186‑2) packages.
| Operating Voltage Range (VCC) | 2.7 V to 5.5 V |
|---|---|
| Undervoltage Lockout (UVLO) Threshold | 2.46 V |
| Input Threshold (VINx) | 0.600 V (typical) |
| Time‑Delay Accuracy | 5 % to 9 % (external capacitor 10 nF‑2.2 µF) |
| Output Low Voltage (SEQ_DONE, PWRGD, FAULT) | 0.4 V |
| Package Types | 20‑lead QSOP (ADM1186‑1) and 16‑lead QSOP (ADM1186‑2) |
The device operates from 2.7 V to 5.5 V on the VCC pin.
It monitors four separate voltage rails via VIN1 to VIN4 pins.
ADM1186‑1 is offered in a 20‑lead QSOP package, while ADM1186‑2 uses a 16‑lead QSOP package.
SEQ_DONE is an open‑drain output that goes high when a power‑up sequence completes and low when the sequence ends or a fault occurs.