Micropower Precision Triple Supply Monitors in 8-Lead MSOP and 5-Lead SOT-23 Packages，can simultaneously monitor three input ports, 1.5% accuracy ensures reliable reset operation, low power consumption, very suitable for power-sensitive systems.
The LTC1727/LTC1728 are micropower precision triple‑supply monitors designed for systems with multiple supply voltages. Each supply input has an open‑drain monitor output, and a common reset output stays low until all supplies are within spec for 200 ms. The devices offer 1.5 % threshold accuracy over temperature, very low 10 mA typical supply current, and built‑in glitch immunity.
The datasheet provides full electrical characteristics, pin descriptions, and package options (8‑lead MSOP/SO for LTC1727 and 5‑lead SOT‑23 for LTC1728). Typical performance graphs, block diagrams, and application examples illustrate power‑up, power‑down, and override functions for 3.3 V, 5 V, 2.5 V, and 1.8 V monitoring configurations.
| Typical Supply Current | 10 mA |
|---|---|
| Reset Pulse Width (typ) | 200 ms |
| Threshold Accuracy | ±1.5 % over temperature |
The devices draw about 10 mA typical supply current.
The reset output remains low for approximately 200 ms after all supplies become valid.