Description

The LTC2902 is a programmable supply monitor for systems with up to four supply voltages. It allows users to select one of the 16 preset or adjustable voltage monitor combinations using an external resistor divider connected to the program pin. The preset voltage thresholds can be digitally programmed to 5%, 7.5%, 10%, or 12.5% below the nominal operating voltage, and have an accuracy of 1.5% over temperature. Each of the four voltage comparator outputs is connected to separate pins for individual supply monitoring.

Specifications and features

• Simultaneously Monitors Four Supplies
• 16 User Selectable Combinations of 5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V and/or ±Adjustable Voltage Thresholds
• Guaranteed Threshold Accuracy: ±1.5% of Monitored Voltage Over Temperature
• Selectable Supply Tolerance: 5%, 7.5%, 10%, 12.5% Below Monitored Voltage
• Low Supply Current: 43µA Typ
• Adjustable Reset Time
• RESET Disable Pin for Margining Applications
• Open-Drain RST Output (LTC2902-1)
• Push-Pull RST Output (LTC2902-2)
• Individual Nondelayed Monitor Outputs for Each Supply
• Power Supply Glitch Immunity
• Guaranteed RESET for VCC ≥ 1V

Application Scenarios

• Desktop and Notebook Computers
• Multivoltage Systems
• Telecom Equipment
• Portable Battery-Powered Equipment
• Network Servers

Comparison