The LTC2909ITS8-5 is a dual input monitor intended for a variety of system monitoring applications. Polarity selection and a buffered reference output allow the LTC2909ITS8-5 to monitor positive and negative supplies for undervoltage (UV) and overvoltage (OV) conditions.
The two inputs have a nominal 0.5V threshold, featuring tight 1.5% threshold accuracy over the entire operating temperature range. Glitch filtering ensures reliable reset operation without false triggering. A third fixed-threshold UVLO monitor on the part’s VCC (also 1.5% accuracy) is available for standard logic supplies.
The common reset output has a timeout that may use a preset 200ms, be set by an external capacitor or be disabled. A three-state input pin sets the input polarity of each adjustable input without requiring any external components.
The LTC2909ITS8-5 provides a highly versatile, precise, space-conscious, micropower solution for supply monitoring.
Feature
- Two Low Voltage Adjustable Inputs (0.5V)
- Pin Selectable Input Polarity Allows Negative 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
- Open-Drain RST Output
- Accurate UVLO for 2.5V, 3.3V, 5V Systems
- Ultralow Voltage Reset: VCC = 0.5V Guaranteed
- Space Saving 8-Lead TSOT-23 and 3mm × 2mm DFN Packages
Applications
- Desktop and Notebook Computers
- Handheld Devices
- Network Servers
- Core, I/O Monitor
- Automotive
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