LTC1726 Datasheet

• Monitors Three Inputs Simultaneously
  • LTC1726-5: 5V, 3.3V and ADJ
  • LTC1726-2.5: 2.5V, 3.3V and ADJ
• ±1.5% Threshold Accuracy Over Temperature
• Low Supply Current: 16μA Typ
• Adjustable Reset Timeout
• Adjustable Watchdog Timeout
• Active Low Open-Drain Reset Output
• Power Supply Glitch Immunity
• Guaranteed RESET for V_CC3 ≥ 1V or V_CC25/V_CC5 ≥ 1V
• MS8 and SO-8 Packages

• Desktop Computers
• Notebook Computers
• Intelligent Instruments
• Portable Battery-Powered Equipment
• Network Servers

The LTC1726 is a triple supply monitor and microprocessor supervisory circuit with adjustable reset and watchdog functions intended for systems with multiple supply voltages. The part has a common open-drain reset output with an adjustable delay. The reset and watchdog time-out periods are both adjustable using external capacitors.

Tight 1.5% accuracy specifications and glitch immunity ensure reliable reset operation without false triggering.

The RST output is guaranteed to be in the correct state for V_CC5/V_CC25 or V_CC3 down to 1V. The LTC1726 may also be configured to monitor any one or two V_CC inputs instead of three, depending on system requirements.

The low (16μA typical) supply current makes the LTC1726 ideal for power-conscious systems.