LTC2909
Info: : PRODUCTION
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LTC2909

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

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 24
1ku List Price Starting From $1.92
Features
  • 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
Additional Details
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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.

Applications

  • Desktop and Notebook Computers
  • Handheld Devices
  • Network Servers
  • Core, I/O Monitor
  • Automotive
Part Models 24
1ku List Price Starting From $1.92

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC2909CDDB-2.5#TRMPBF
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LTC2909CTS8-2.5#TRMPBF
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LTC2909CTS8-3.3#TRMPBF
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LTC2909IDDB-2.5#TRMPBF
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LTC2909IDDB-3.3#TRMPBF
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LTC2909ITS8-2.5#TRMPBF
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LTC2909ITS8-3.3#TRMPBF
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Software & Part Ecosystem

Software & Part Ecosystem

Tools & Simulations

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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