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LTC2919HDDB-2.5-PBF Datasheet(PDF) 1 Page - Linear Technology |
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LTC2919HDDB-2.5-PBF Datasheet(HTML) 1 Page - Linear Technology |
1 / 16 page LTC2919 1 2919f SEL Pin Connection for Input Polarity Combinations POLARITY ADJ1 ADJ2 SEL PIN ++ VCC +– OPEN –– GND Precision Triple/Dual Input UV, OV and Negative Voltage Monitor ■ Desktop and Notebook Computers ■ Network Servers ■ Core, I/O Monitor ■ Automotive ■ 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 3.3V UV/OV (Window) Monitor Application with 200ms Internal Timeout (3.3V Logic Out) VCC LTC2919–2.5 ADJ1 ADJ2 REF OUT2 SEL OUT1 RST 10k UV OV 10k 10k 2919 TA01a 453k 3.3V 10.7k 76.8k 0.1μF TMR GND FAULT The LTC®2919 is a triple/dual input monitor intended for a variety of system monitoring applications. Polarity selec- tion 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 out- puts 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 accu- rate 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 DESCRIPTIO APPLICATIO S TYPICAL APPLICATIO , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6949965, 7292076. |
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