LTC2911 - Precision Triple Supply Monitor with Power-Fail Comparator

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 the PFO output 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 the RST output to be latched to prevent system resets, simplifying margin testing.

Features

Ultralow Voltage Reset: VCC = 0.5V Guaranteed
Monitors Three Inputs Simultaneously: 3.3V, 5V, ADJ (LTC2911-1)
±1.5% Threshold Accuracy
Power-Fail Monitor
RST State 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

Typical Application

Applications

Network Servers
Desktop and Notebook Computers
Automotive and Industrial Electronics

Packaging

**Order Information**
Part Number	Package	Temp	Price(1-99)	Price (1k)*
LTC2911CDDB-1#TRMPBF	3x2 DFN-8	C	$2.17	$1.57
LTC2911CDDB-1#TRPBF	3x2 DFN-8	C	$2.17	$1.52
LTC2911CDDB-2#TRMPBF	3x2 DFN-8	C	$2.17	$1.57
LTC2911CDDB-2#TRPBF	3x2 DFN-8	C	$2.17	$1.52
LTC2911CDDB-3#TRMPBF	3x2 DFN-8	C	$2.17	$1.57
LTC2911CDDB-3#TRPBF	3x2 DFN-8	C	$2.17	$1.52
LTC2911CDDB-4#TRMPBF	3x2 DFN-8	C	$2.17	$1.57
LTC2911CDDB-4#TRPBF	3x2 DFN-8	C	$2.17	$1.52
LTC2911CDDB-5#TRMPBF	3x2 DFN-8	C	$2.17	$1.57
LTC2911CDDB-5#TRPBF	3x2 DFN-8	C	$2.17	$1.52
LTC2911CTS8-1#TRMPBF	SOT-23	C	$2.17	$1.57
LTC2911CTS8-1#TRPBF	SOT-23	C	$2.17	$1.52
LTC2911CTS8-2#TRMPBF	SOT-23	C	$2.17	$1.57
LTC2911CTS8-2#TRPBF	SOT-23	C	$2.17	$1.52
LTC2911CTS8-3#TRMPBF	SOT-23	C	$2.17	$1.57
LTC2911CTS8-3#TRPBF	SOT-23	C	$2.17	$1.52
LTC2911CTS8-4#TRMPBF	SOT-23	C	$2.17	$1.57
LTC2911CTS8-4#TRPBF	SOT-23	C	$2.17	$1.52
LTC2911CTS8-5#TRMPBF	SOT-23	C	$2.17	$1.57
LTC2911CTS8-5#TRPBF	SOT-23	C	$2.17	$1.52
LTC2911HDDB-1#TRMPBF	3x2 DFN-8	H	$2.87	$2.06
LTC2911HDDB-1#TRPBF	3x2 DFN-8	H	$2.87	$2.01
LTC2911HDDB-2#TRMPBF	3x2 DFN-8	H	$2.87	$2.06
LTC2911HDDB-2#TRPBF	3x2 DFN-8	H	$2.87	$2.01
LTC2911HDDB-3#TRMPBF	3x2 DFN-8	H	$2.87	$2.06
LTC2911HDDB-3#TRPBF	3x2 DFN-8	H	$2.87	$2.01
LTC2911HDDB-4#TRMPBF	3x2 DFN-8	H	$2.87	$2.06
LTC2911HDDB-4#TRPBF	3x2 DFN-8	H	$2.87	$2.01
LTC2911HDDB-5#TRMPBF	3x2 DFN-8	H	$2.87	$2.06
LTC2911HDDB-5#TRPBF	3x2 DFN-8	H	$2.87	$2.01
LTC2911HTS8-1#TRMPBF	SOT-23	H	$2.87	$2.06
LTC2911HTS8-1#TRPBF	SOT-23	H	$2.87	$2.01
LTC2911HTS8-2#TRMPBF	SOT-23	H	$2.87	$2.06
LTC2911HTS8-2#TRPBF	SOT-23	H	$2.87	$2.01
LTC2911HTS8-3#TRMPBF	SOT-23	H	$2.87	$2.06
LTC2911HTS8-3#TRPBF	SOT-23	H	$2.87	$2.01
LTC2911HTS8-4#PBF	SOT-23	H	$2.87
LTC2911HTS8-4#TRMPBF	SOT-23	H	$2.87	$2.06
LTC2911HTS8-4#TRPBF	SOT-23	H	$2.87	$2.01
LTC2911HTS8-5#TRMPBF	SOT-23	H	$2.87	$2.06
LTC2911HTS8-5#TRPBF	SOT-23	H	$2.87	$2.01
LTC2911IDDB-1#TRMPBF	3x2 DFN-8	I	$2.50	$1.80
LTC2911IDDB-1#TRPBF	3x2 DFN-8	I	$2.50	$1.75
LTC2911IDDB-2#TRMPBF	3x2 DFN-8	I	$2.50	$1.80
LTC2911IDDB-2#TRPBF	3x2 DFN-8	I	$2.50	$1.75
LTC2911IDDB-3#TRMPBF	3x2 DFN-8	I	$2.50	$1.80
LTC2911IDDB-3#TRPBF	3x2 DFN-8	I	$2.50	$1.75
LTC2911IDDB-4#TRMPBF	3x2 DFN-8	I	$2.50	$1.80
LTC2911IDDB-4#TRPBF	3x2 DFN-8	I	$2.50	$1.75
LTC2911IDDB-5#TRMPBF	3x2 DFN-8	I	$2.50	$1.80
LTC2911IDDB-5#TRPBF	3x2 DFN-8	I	$2.50	$1.75
LTC2911ITS8-1#TRMPBF	SOT-23	I	$2.50	$1.80
LTC2911ITS8-1#TRPBF	SOT-23	I	$2.50	$1.75
LTC2911ITS8-2#TRMPBF	SOT-23	I	$2.50	$1.80
LTC2911ITS8-2#TRPBF	SOT-23	I	$2.50	$1.75
LTC2911ITS8-3#TRMPBF	SOT-23	I	$2.50	$1.80
LTC2911ITS8-3#TRPBF	SOT-23	I	$2.50	$1.75
LTC2911ITS8-4#TRMPBF	SOT-23	I	$2.50	$1.80
LTC2911ITS8-4#TRPBF	SOT-23	I	$2.50	$1.75
LTC2911ITS8-5#TRMPBF	SOT-23	I	$2.50	$1.80
LTC2911ITS8-5#TRPBF	SOT-23	I	$2.50	$1.75