(Hong Kong)
Product Summary
The LTC2902-1IGN#TR is a programmable supply monitor for systems with up to four supply voltages. One of 16 preset or adjustable voltage monitor combinations can be selected using an external resistor divider connected to the program pin. The preset voltage thresholds are digitally programmable to 5%, 7.5%, 10% or 12.5% below the nominal operating voltage, and are accurate to 1.5% over temperature. All four voltage comparator outputs are connected to separate pins for individual supply monitoring.The applications of the LTC2902-1IGN#TR are (1)desktop and notebook computers; (2)multivoltage systems; (3)telecom equipment; (4)portable battery-powered equipment; (5)network servers.
Parametrics
LTC2902-1IGN#TR absolute maximum ratings: (1)V1, V2, V3, V4, VPG : – 0.3V to 7V; (2)RST (LTC2902-1): – 0.3V to 7V; (3)RST (LTC2902-2): – 0.3V to (V2 + 0.3V); (4)COMPX : – 0.3V to 7V; (5)CWT, WDO: – 0.3V to 7V; (6)VREF, CRT, WDI : – 0.3V to (VCC + 0.3V); (7)Reference Load Current (IVREF): ±1mA; (8)V4 Input Current (–ADJ Mode): –1mA; (9)Operating Temperature Range: 0°C to 70°C; (10)Storage Temperature Range : –65°C to 150°C; (11)Lead Temperature (Soldering, 10 sec): 300°C.
Features
LTC2902-1IGN#TR features: (1)Simultaneously Monitors Four Supplies; (2)16 User Selectable Combinations of 5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V and/or ±Adjustable Voltage Thresholds; (3)Guaranteed Threshold Accuracy: ±1.5% of Monitored Voltage Over Temperature; (4)Selectable Supply Tolerance: 5%, 7.5%, 10%, 12.5% Below Monitored Voltage; (5)Low Supply Current: 43mA Typ; (6)Adjustable Reset Time; (7)RESET Disable Pifor Margining Applications; (8)Open-DraiRST Output (LTC2902-1); (9)Push-Pull RST Output (LTC2902-2); (10)Individual Nondelayed Monitor Outputs for Each Supply; (11)Power Supply Glitch Immunity.
Diagrams
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 LTC2902-1IGN#TR |
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IC MONITOR SUPPLY QUAD 16-SSOP |
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LTC2902-1IGN#TRPBF |
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IC MON SUPP QD W/RST&SEL 16-SSOP |
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