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LTC2902

Linear Integrated
Part Number LTC2902
Manufacturer Linear Integrated
Description Programmable Quad Supply Monitor
Published Dec 7, 2006
Detailed Description www.DataSheet4U.com LTC2902 Programmable Quad Supply Monitor with Adjustable Reset Timer and Supply Tolerance DESCRIPTI...
Datasheet PDF File LTC2902 PDF File

LTC2902
LTC2902

Overview
www.
DataSheet4U.
com LTC2902 Programmable Quad Supply Monitor with Adjustable Reset Timer and Supply Tolerance DESCRIPTIO The LTC®2902 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.
The RST output is guaranteed to be in the correct state for VCC down to 1V and may be disabled during supply margin testing.
The LTC2902-1 features an open-drain RST output, while the LTC2902-2 has a push-pull RST output.
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
FEATURES s s s s s s s s s s s s U APPLICATIO S s s s s s 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 Desktop and Notebook Computers Multivoltage Systems Telecom Equi...


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