The LTC2911 is a low power, high accuracy triple supply monitor with a power-fail comparator. Reset timeout may be selected with an external capacitor or set to an internally generated 200ms. The V1 pin monitors a 3.3V supply. The V2 pin monitors a 5V, 2.5V, 1.8V, 1.2V or adjustable supply. A third adjustable input has a nominal 0.5V threshold allowing a resistive divider to configure its threshold. All three comparators feature a tight 1.5% threshold accuracy over the entire operating temperature range while a glitch filter ensures reliable reset operation. A spare comparator can be configured to provide early warning of a low voltage condition. It causes the PFO output to pull low when the voltage of the PFI input falls below 0.5V, allowing the power-fail threshold to be configured with a resistive divider. A latch feature on the TMR pin allows the RST output to be latched to prevent system resets, simplifying margin testing. Applications * Network Servers * Desktop and Notebook Computers * Automotive and Industrial Electronics * Ultralow Voltage Reset: VCC = 0.5V Guaranteed * Monitors Three Inputs Simultaneously: * 3.3V, 5V, ADJ (LTC2911-1) * 3.3V, 2.5V, ADJ (LTC2911-2) * 3.3V, 1.8V, ADJ (LTC2911-3) * 3.3V, 1.2V, ADJ (LTC2911-4) * 3.3V, ADJ, ADJ (LTC2911-5) * ±1.5% Threshold Accuracy * Power-Fail Monitor * RST State Can Be Held for Margining * Low Supply Current: 30μA Typical * Input Glitch Immunity * Adjustable Reset Timeout Period * Selectable Internal Timeout Saves Components * Space Saving 8-Lead TSOT-23 and 3mm × 2mm DFN Packages https://elecena.pl/product/1166200/precision-triple-supply-monitor-with-power-fail-comparator 2010-10-03 https://elecena.pl/product/1166200/precision-triple-supply-monitor-with-power-fail-comparator 2017-10-28 https://elecena.pl/product/1166200/precision-triple-supply-monitor-with-power-fail-comparator 2025-01-19