LTC2911 Series

Precision Triple Supply Monitor with Power-Fail Comparator

Catalog

Precision Triple Supply Monitor with Power-Fail Comparator

Part	Package / Case	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Threshold	Voltage - Threshold	Reset	Output	Supplier Device Package	Number of Voltages Monitored	Mounting Type	Type	Reset Timeout
Analog Devices LTC2911HTS8-2#TRMPBF	SOT-23-8 Thin TSOT-23-8	-40 °C	125 °C	Adj	2.338 V 3.086 V	Active Low	Push-Pull Totem Pole	TSOT-23-8	3	Surface Mount	Multi-Voltage Supervisor	Adjustable/Selectable
Analog Devices LTC2911HDDB-4	8-WFDFN Exposed Pad	-40 °C	125 °C	Adj	1.122 V 3.086 V	Active Low	Push-Pull Totem Pole	8-DFN (3x2)	3	Surface Mount	Multi-Voltage Supervisor	Adjustable/Selectable
Analog Devices LTC2911IDDB-5#TRPBF	8-WFDFN Exposed Pad	-40 °C	85 °C	Adj	3.086 V	Active Low	Push-Pull Totem Pole	8-DFN (3x2)	3	Surface Mount	Multi-Voltage Supervisor	Adjustable/Selectable
Analog Devices LTC2911CTS8-3#TRPBF	SOT-23-8 Thin TSOT-23-8	0 °C	70 °C	Adj	1.683 V 3.086 V	Active Low	Push-Pull Totem Pole	TSOT-23-8	3	Surface Mount	Multi-Voltage Supervisor	Adjustable/Selectable
Analog Devices LTC2911IDDB-5#TRMPBF	8-WFDFN Exposed Pad	-40 °C	85 °C	Adj	3.086 V	Active Low	Push-Pull Totem Pole	8-DFN (3x2)	3	Surface Mount	Multi-Voltage Supervisor	Adjustable/Selectable
Analog Devices LTC2911CDDB-5#TRMPBF	8-WFDFN Exposed Pad	0 °C	70 °C	Adj	3.086 V	Active Low	Push-Pull Totem Pole	8-DFN (3x2)	3	Surface Mount	Multi-Voltage Supervisor	Adjustable/Selectable
Analog Devices LTC2911CDDB-1#TRPBF	8-WFDFN Exposed Pad	0 °C	70 °C			Active Low	Push-Pull Totem Pole	8-DFN (3x2)	3	Surface Mount	Multi-Voltage Supervisor	Adjustable/Selectable
Analog Devices LTC2911CDDB-4	8-WFDFN Exposed Pad	0 °C	70 °C	Adj	1.122 V 3.086 V	Active Low	Push-Pull Totem Pole	8-DFN (3x2)	3	Surface Mount	Multi-Voltage Supervisor	Adjustable/Selectable
Analog Devices LTC2911CDDB-1#TRMPBF	8-WFDFN Exposed Pad	0 °C	70 °C			Active Low	Push-Pull Totem Pole	8-DFN (3x2)	3	Surface Mount	Multi-Voltage Supervisor	Adjustable/Selectable
Analog Devices LTC2911HDDB-2#TRMPBF	8-WFDFN Exposed Pad	-40 °C	125 °C	Adj	2.338 V 3.086 V	Active Low	Push-Pull Totem Pole	8-DFN (3x2)	3	Surface Mount	Multi-Voltage Supervisor	Adjustable/Selectable

Catalog

Precision Triple Supply Monitor with Power-Fail Comparator

Key Features

• Ultralow Voltage Reset: VCC= 0.5V Guaranteed

• Monitors Three Inputs Simultaneously:3.3V, 5V, ADJ (LTC2911-1)3.3V, 2.5V, ADJ (LTC2911-2)3.3V, 1.8V, ADJ (LTC2911-3)3.3V, 1.2V, ADJ (LTC2911-4)3.3V, ADJ, ADJ (LTC2911-5)

• 3.3V, 5V, ADJ (LTC2911-1)

• 3.3V, 2.5V, ADJ (LTC2911-2)

• 3.3V, 1.8V, ADJ (LTC2911-3)

• 3.3V, 1.2V, ADJ (LTC2911-4)

• 3.3V, ADJ, ADJ (LTC2911-5)

• ±1.5% Threshold Accuracy

• Power-Fail Monitor

• RSTState Can Be Held for Margining

• Low Supply Current: 30μA Typical

• Input Glitch Immunity

• Adjustable Reset Timeout Period

• Selectable Internal Timeout Saves Components

• Space Saving 8-Lead TSOT-23 and 3mm × 2mm DFN Packages

Description

The LTC2911 is a low power, high accuracy triple supply monitor with a power-fail comparator. Reset timeout may be selected with an external capacitor or set to an internally generated 200ms.The V1 pin monitors a 3.3V supply. The V2 pin monitors a 5V, 2.5V, 1.8V, 1.2V or adjustable supply. A third adjustable input has a nominal 0.5V threshold allowing a resistive divider to configure its threshold. All three comparators feature a tight 1.5% threshold accuracy over the entire operating temperature range while a glitch filter ensures reliable reset operation.A spare comparator can be configured to provide early warning of a low voltage condition. It causes thePFOoutput to pull low when the voltage of the PFI input falls below 0.5V, allowing the power-fail threshold to be configured with a resistive divider. A latch feature on the TMR pin allows theRSToutput to be latched to prevent system resets, simplifying margin testing.ApplicationsNetwork ServersDesktop and Notebook ComputersAutomotive and Industrial Electronics