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LTC2919 - Precision Triple/Dual Input UV, OV and Negative Voltage Monitor

The LTC2919 is a triple/dual input monitor intended for a variety of system monitoring applications. Polarity selection and a buffered reference output allow the LTC2919 to monitor positive and negative supplies for undervoltage (UV) and overvoltage (OV) conditions. The two adjustable inputs have a nominal 0.5V threshold, featuring tight 1.5% threshold accuracy over the entire operating temperature range. Glitch filtering ensures outputs operate reliably without false triggering. An accurate threshold at the VCC pin provides a third input supply monitor for a 2.5V, 3.3V or 5V supply. Two independent output pins indicate the status of each adjustable input. A third common output provides a configurable reset timeout that may be set by an accurate internal 200ms timer, programmed with an external capacitor, or disabled for a fast response. A three-state input pin sets the input polarity of each adjustable input without requiring any external components. The LTC2919 provides a highly versatile, precise, space- conscious, micropower solution for supply monitoring.

Features Two Low Voltage Adjustable Inputs (0.5V) Accurate UVLO Provides a Third Monitor Input Open-Drain RST, OUT1 and OUT2 Outputs Pin Selectable Input Polarity Allows Negative, UV and OV Monitoring Guaranteed Threshold Accuracy: ±1.5% 6.5V Shunt Regulator for High Voltage Operation Low 50μA Quiescent Current Buffered 1V Reference for Negative Supply Offset Input Glitch Rejection Adjustable Reset Timeout Period Selectable Internal Timeout Saves Components Outputs Guaranteed Low With VCC = 0.5V Space Saving 10-Lead 3mm × 2mm DFN and MSOP Packages Typical Application

Applications Desktop and Notebook Computers Network Servers Core, I/O Monitor Automotive Packaging