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LTC2932 Dataheets PDF



Part Number LTC2932
Manufacturers Linear Technology
Logo Linear Technology
Description Confi gurable Six Supply Monitor
Datasheet LTC2932 DatasheetLTC2932 Datasheet (PDF)

FEATURES ■ ■ LTC2932 Configurable Six Supply Monitor with Adjustable Reset Timer and Supply Tolerance DESCRIPTION The LTC®2932 is a configurable supply monitor for systems with up to six supply voltages. One of 16 preset or adjustable voltage monitor combinations can be selected using an external resistive divider connected to the mode select pin. The preset voltage thresholds are digitally configurable to 5%, 7.5%, 10%, or 12.5% below the nominal operating voltage. The LTC2932 also features adjus.

  LTC2932   LTC2932



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FEATURES ■ ■ LTC2932 Configurable Six Supply Monitor with Adjustable Reset Timer and Supply Tolerance DESCRIPTION The LTC®2932 is a configurable supply monitor for systems with up to six supply voltages. One of 16 preset or adjustable voltage monitor combinations can be selected using an external resistive divider connected to the mode select pin. The preset voltage thresholds are digitally configurable to 5%, 7.5%, 10%, or 12.5% below the nominal operating voltage. The LTC2932 also features adjustable inputs with a 0.5V nominal threshold. All six open-drain voltage comparator outputs are connected to separate pins for individual supply monitoring. The reset timeout period is adjustable using an external capacitor. The RST output is guaranteed to be in the correct state for VCC down to 1V and may be disabled during supply margin testing. Each status output has a weak internal pull-up and may be externally pulled up to an external voltage. The 52μA supply current makes the LTC2932 ideal for power conscious systems and the part may be configured to monitor less than six inputs. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6967591, 7119714, 7239251. ■ ■ ■ ■ ■ ■ ■ ■ Simultaneously Monitors Six Supplies 16 User Selectable Combinations of 5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V and ± Adjustable Voltage Thresholds Guaranteed Threshold Accuracy: ±1.5% Selectable Supply Tolerances: 5%, 7.5%, 10%, 12.5% Below Monitored Voltage Reset Disable Pin for Margining Applications Low Supply Current: 52μA Power Supply Glitch Immunity Guaranteed RST for VCC ≥ 1V High Temperature Operation to 125°C 20-Lead TSSOP Package APPLICATIONS ■ ■ ■ ■ ■ ■ Desktop and Notebook Computers Multivoltage Systems Telecom Equipment Portable Battery-Powered Equipment Network Servers Automotive www.DataSheet4U.com TYPICAL APPLICATION Six Supply Monitor 12V (ADJ), 5V, 3.3V, 2.5V, 1.8V, 1.2V (ADJ) 12V 5V 3.3V 2.5V 1.8V 1.2V 10k 2150k 1% 124k 1% COMP1 COMP2 COMP3 COMP4 COMP5 V1 V2 0.1μF 0.1μF 100k 1% 100k 1% R1 59k 1% R2 40.2k 1% V3 V4 V5 V6 VREF VPG GND T0 T1 CRT RST 2932 TA01 Voltage Threshold Configuration Table V1 (V) 5 5 SYSTEM LOGIC V2 (V) 3.3 3.3 3.3 3.3 3.3 3.3 3.3 3 3 3 2.5 2.5 2.5 2.5 2.5 2.5 V3 (V) 2.5 2.5 2.5 1.8 1.8 ADJ ADJ 2.5 1.8 ADJ 1.8 1.8 1.8 1.5 ADJ ADJ V4 (V) 1.8 1.5 ADJ ADJ –ADJ ADJ –ADJ ADJ ADJ ADJ 1.5 ADJ –ADJ ADJ ADJ –ADJ V5 (V) ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ V6 (V) ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ 2932fb 5 5 5 5 5 5 5 5 POWER GOOD COMP6 LTC2932 RDIS 3.3 3.3 3.3 3.3 3.3 3.3 tRST = 94ms CRT 47nF 1 LTC2932 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2, 3) PIN CONFIGURATION TOP VIEW COMP5 V5 COMP3 COMP1 V3 V1 CRT RST T0 1 2 3 4 5 6 7 8 9 20 COMP6 19 V6 18 COMP2 17 COMP4 16 V2 15 V4 14 VREF 13 VPG 12 GND 11 T1 V1, V2, V3, V4, V5, V6, VPG ........................ –0.3V to 7V R.



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