LTC1727 Datasheet

• Monitors Three Inputs Simultaneously
  • LTC1727-5: 5V, 3.3V and ADJ
  • LTC1727-2.5: 2.5V, 3.3V and ADJ
• ±1.5% Threshold Accuracy Over Temperature
• Very Low Supply Current: 10µA Typ
• 200ms Reset Time Delay
• Active Low RESET Output
• Power Supply Glitch Immunity
• Guaranteed RESET for V_CC3 ≥ 1V or V_CC5/V_CC25/V_CC18 ≥ 1V
• LTC1727 Includes Monitor Output for Each Supply
• LTC1727: 8-Lead MSOP and SO Packages

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

The LTC1727 is a triple supply monitor intended for systems with multiple supply voltages. Each supply monitor has its own open-drain output for individual supply monitoring. A common open-drain reset output remains low until all three supplies have been in compliance for 200ms. 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/V_CC18 or V_CC3 down to 1V. The LTC1727 may also be configured to monitor any one or two V_CC inputs instead of three, depending on system requirements.

Very low (10µA typical) supply current makes the LTC1727 ideal for power conscious systems.

The LTC1727 is available in an 8-lead MSOP or SO package.