LTC2902 Series

Programmable Quad Supply Monitor with Adjustable Reset Timer and Supply Tolerance

Catalog

Programmable Quad Supply Monitor with Adjustable Reset Timer and Supply Tolerance

Part	Supplier Device Package	Output	Mounting Type	Reset	Voltage - Threshold	Number of Voltages Monitored	Package / Case	Package / Case	Package / Case	Reset Timeout	Type	Operating Temperature [Max]	Operating Temperature [Min]
Analog Devices LTC2902-2IGN#TRPBF	16-SSOP	Push-Pull Totem Pole	Surface Mount	Active Low	16 Selectable Threshold Combinations	4	0.154 in	16-SSOP	3.9 mm	5 ms	Multi-Voltage Supervisor	85 °C	-40 °C
Analog Devices LTC2902-2IGN#PBF	16-SSOP	Push-Pull Totem Pole	Surface Mount	Active Low	16 Selectable Threshold Combinations	4	0.154 in	16-SSOP	3.9 mm	5 ms	Multi-Voltage Supervisor	85 °C	-40 °C

Catalog

Programmable Quad Supply Monitor with Adjustable Reset Timer and Supply Tolerance

Key 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

• RESETDisable Pin for Margining Applications

• Open-DrainRSTOutput (LTC2902-1)

• Push-PullRSTOutput (LTC2902-2)

• Individual Nondelayed Monitor Outputs for Each Supply

• Power Supply Glitch Immunity

• GuaranteedRESETfor VCC≥ 1V

Description

The LTC2902 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 reset delay time is adjustable using an external capacitor. Tight voltage threshold accuracy and glitch immunity ensure reliable reset operation without false triggering. TheRSToutput is guaranteed to be in the correct state for VCCdown to 1V and may be disabled during supply margin testing. The LTC2902-1 features an open-drainRSToutput, while the LTC2902-2 has a push-pullRSToutput.The 43µA supply current makes the LTC2902 ideal for power conscious systems and the part may be configured to monitor less than four inputs. The LTC2902-1/LTC2902-2 are available in the 16-lead narrow SSOP package.ApplicationsDesktop and Notebook ComputersMultivoltage SystemsTelecom EquipmentPortable Battery-Powered EquipmentNetwork Servers