Features and Benefits
- 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
The LTC2909 is a dual input monitor intended for a variety of system monitoring applications. Polarity selection and a buffered reference output allow the LTC2909 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 LTC2909 provides a highly versatile, precise, space-conscious, micropower solution for supply monitoring.
- Desktop and Notebook Computers
- Handheld Devices
- Network Servers
- Core, I/O Monitor
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
R413 Reliability Data3/26/2018
Tools & Simulations
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Buy Now Pricing
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