Features and Benefits

  • Ultralow Voltage Reset: VCC = 0.5V Guaranteed
  • Monitors Three Inputs Simultaneously:
    • 3.3V, 5V, ADJ (LTC2911-1)
    • 3.3V, 2.5V, ADJ (LTC2911-2)
    • 3.3V, 1.8V, ADJ (LTC2911-3)
    • 3.3V, 1.2V, ADJ (LTC2911-4)
    • 3.3V, ADJ, ADJ (LTC2911-5)
  • ±1.5% Threshold Accuracy
  • Power-Fail Monitor
  • RST State Can Be Held for Margining
  • Low Supply Current: 30μA Typical
  • Input Glitch Immunity
  • Adjustable Reset Timeout Period
  • Selectable Internal Timeout Saves Components
  • Space Saving 8-Lead TSOT-23 and 3mm × 2mm DFN Packages

Product Details

The LTC2911 is a low power, high accuracy triple supply monitor with a power-fail comparator. Reset timeout may be selected with an external capacitor or set to an internally generated 200ms.

The V1 pin monitors a 3.3V supply. The V2 pin monitors a 5V, 2.5V, 1.8V, 1.2V or adjustable supply. A third adjustable input has a nominal 0.5V threshold allowing a resistive divider to configure its threshold. All three comparators feature a tight 1.5% threshold accuracy over the entire operating temperature range while a glitch filter ensures reliable reset operation.

A spare comparator can be configured to provide early warning of a low voltage condition. It causes the PFO output to pull low when the voltage of the PFI input falls below 0.5V, allowing the power-fail threshold to be configured with a resistive divider. A latch feature on the TMR pin allows the RST output to be latched to prevent system resets, simplifying margin testing.


  • Network Servers
  • Desktop and Notebook Computers
  • Automotive and Industrial Electronics

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

Sample & Buy

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