LTC2911 - Precision Triple Supply Monitor with Power-Fail Comparator

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)
  • ±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

LTC2911 Typical Application
LTC2911 Typical Application

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 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.

 

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC2911CDDB-1#TRMPBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2911CDDB-1#TRPBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2911CDDB-2#TRMPBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2911CDDB-2#TRPBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2911CDDB-3#TRMPBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2911CDDB-3#TRPBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2911CDDB-4#TRMPBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2911CDDB-4#TRPBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2911CDDB-5#TRMPBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2911CDDB-5#TRPBF 3x2 DFN-8 DDB C 05-08-1702 Yes
LTC2911CTS8-1#TRMPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2911CTS8-1#TRPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2911CTS8-2#TRMPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2911CTS8-2#TRPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2911CTS8-3#TRMPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2911CTS8-3#TRPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2911CTS8-4#TRMPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2911CTS8-4#TRPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2911CTS8-5#TRMPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2911CTS8-5#TRPBF SOT-23 TS8 C 05-08-1637 Yes
LTC2911HDDB-1#TRMPBF 3x2 DFN-8 DDB H 05-08-1702 Yes
LTC2911HDDB-1#TRPBF 3x2 DFN-8 DDB H 05-08-1702 Yes
LTC2911HDDB-2#TRMPBF 3x2 DFN-8 DDB H 05-08-1702 Yes
LTC2911HDDB-2#TRPBF 3x2 DFN-8 DDB H 05-08-1702 Yes
LTC2911HDDB-3#TRMPBF 3x2 DFN-8 DDB H 05-08-1702 Yes
LTC2911HDDB-3#TRPBF 3x2 DFN-8 DDB H 05-08-1702 Yes
LTC2911HDDB-4#TRMPBF 3x2 DFN-8 DDB H 05-08-1702 Yes
LTC2911HDDB-4#TRPBF 3x2 DFN-8 DDB H 05-08-1702 Yes
LTC2911HDDB-5#TRMPBF 3x2 DFN-8 DDB H 05-08-1702 Yes
LTC2911HDDB-5#TRPBF 3x2 DFN-8 DDB H 05-08-1702 Yes
LTC2911HTS8-1#TRMPBF SOT-23 TS8 H 05-08-1637 Yes
LTC2911HTS8-1#TRPBF SOT-23 TS8 H 05-08-1637 Yes
LTC2911HTS8-2#TRMPBF SOT-23 TS8 H 05-08-1637 Yes
LTC2911HTS8-2#TRPBF SOT-23 TS8 H 05-08-1637 Yes
LTC2911HTS8-3#TRMPBF SOT-23 TS8 H 05-08-1637 Yes
LTC2911HTS8-3#TRPBF SOT-23 TS8 H 05-08-1637 Yes
LTC2911HTS8-4#PBF SOT-23 TS8 H 05-08-1637 Yes
LTC2911HTS8-4#TRMPBF SOT-23 TS8 H 05-08-1637 Yes
LTC2911HTS8-4#TRPBF SOT-23 TS8 H 05-08-1637 Yes
LTC2911HTS8-5#TRMPBF SOT-23 TS8 H 05-08-1637 Yes
LTC2911HTS8-5#TRPBF SOT-23 TS8 H 05-08-1637 Yes
LTC2911IDDB-1#TRMPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2911IDDB-1#TRPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2911IDDB-2#TRMPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2911IDDB-2#TRPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2911IDDB-3#TRMPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2911IDDB-3#TRPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2911IDDB-4#TRMPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2911IDDB-4#TRPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2911IDDB-5#TRMPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2911IDDB-5#TRPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LTC2911ITS8-1#TRMPBF SOT-23 TS8 I 05-08-1637 Yes
LTC2911ITS8-1#TRPBF SOT-23 TS8 I 05-08-1637 Yes
LTC2911ITS8-2#TRMPBF SOT-23 TS8 I 05-08-1637 Yes
LTC2911ITS8-2#TRPBF SOT-23 TS8 I 05-08-1637 Yes
LTC2911ITS8-3#TRMPBF SOT-23 TS8 I 05-08-1637 Yes
LTC2911ITS8-3#TRPBF SOT-23 TS8 I 05-08-1637 Yes
LTC2911ITS8-4#TRMPBF SOT-23 TS8 I 05-08-1637 Yes
LTC2911ITS8-4#TRPBF SOT-23 TS8 I 05-08-1637 Yes
LTC2911ITS8-5#TRMPBF SOT-23 TS8 I 05-08-1637 Yes
LTC2911ITS8-5#TRPBF SOT-23 TS8 I 05-08-1637 Yes


LTC2911 Package Drawing
LTC2911 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC2911CDDB-1#TRMPBF 3x2 DFN-8 C $2.17 $1.57 Yes
LTC2911CDDB-1#TRPBF 3x2 DFN-8 C $2.17 $1.52 Yes
LTC2911CDDB-2#TRMPBF 3x2 DFN-8 C $2.17 $1.57 Yes
LTC2911CDDB-2#TRPBF 3x2 DFN-8 C $2.17 $1.52 Yes
LTC2911CDDB-3#TRMPBF 3x2 DFN-8 C $2.17 $1.57 Yes
LTC2911CDDB-3#TRPBF 3x2 DFN-8 C $2.17 $1.52 Yes
LTC2911CDDB-4#TRMPBF 3x2 DFN-8 C $2.17 $1.57 Yes
LTC2911CDDB-4#TRPBF 3x2 DFN-8 C $2.17 $1.52 Yes
LTC2911CDDB-5#TRMPBF 3x2 DFN-8 C $2.17 $1.57 Yes
LTC2911CDDB-5#TRPBF 3x2 DFN-8 C $2.17 $1.52 Yes
LTC2911CTS8-1#TRMPBF SOT-23 C $2.17 $1.57 Yes
LTC2911CTS8-1#TRPBF SOT-23 C $2.17 $1.52 Yes
LTC2911CTS8-2#TRMPBF SOT-23 C $2.17 $1.57 Yes
LTC2911CTS8-2#TRPBF SOT-23 C $2.17 $1.52 Yes
LTC2911CTS8-3#TRMPBF SOT-23 C $2.17 $1.57 Yes
LTC2911CTS8-3#TRPBF SOT-23 C $2.17 $1.52 Yes
LTC2911CTS8-4#TRMPBF SOT-23 C $2.17 $1.57 Yes
LTC2911CTS8-4#TRPBF SOT-23 C $2.17 $1.52 Yes
LTC2911CTS8-5#TRMPBF SOT-23 C $2.17 $1.57 Yes
LTC2911CTS8-5#TRPBF SOT-23 C $2.17 $1.52 Yes
LTC2911HDDB-1#TRMPBF 3x2 DFN-8 H $2.87 $2.06 Yes
LTC2911HDDB-1#TRPBF 3x2 DFN-8 H $2.87 $2.01 Yes
LTC2911HDDB-2#TRMPBF 3x2 DFN-8 H $2.87 $2.06 Yes
LTC2911HDDB-2#TRPBF 3x2 DFN-8 H $2.87 $2.01 Yes
LTC2911HDDB-3#TRMPBF 3x2 DFN-8 H $2.87 $2.06 Yes
LTC2911HDDB-3#TRPBF 3x2 DFN-8 H $2.87 $2.01 Yes
LTC2911HDDB-4#TRMPBF 3x2 DFN-8 H $2.87 $2.06 Yes
LTC2911HDDB-4#TRPBF 3x2 DFN-8 H $2.87 $2.01 Yes
LTC2911HDDB-5#TRMPBF 3x2 DFN-8 H $2.87 $2.06 Yes
LTC2911HDDB-5#TRPBF 3x2 DFN-8 H $2.87 $2.01 Yes
LTC2911HTS8-1#TRMPBF SOT-23 H $2.87 $2.06 Yes
LTC2911HTS8-1#TRPBF SOT-23 H $2.87 $2.01 Yes
LTC2911HTS8-2#TRMPBF SOT-23 H $2.87 $2.06 Yes
LTC2911HTS8-2#TRPBF SOT-23 H $2.87 $2.01 Yes
LTC2911HTS8-3#TRMPBF SOT-23 H $2.87 $2.06 Yes
LTC2911HTS8-3#TRPBF SOT-23 H $2.87 $2.01 Yes
LTC2911HTS8-4#PBF SOT-23 H $2.87 Yes
LTC2911HTS8-4#TRMPBF SOT-23 H $2.87 $2.06 Yes
LTC2911HTS8-4#TRPBF SOT-23 H $2.87 $2.01 Yes
LTC2911HTS8-5#TRMPBF SOT-23 H $2.87 $2.06 Yes
LTC2911HTS8-5#TRPBF SOT-23 H $2.87 $2.01 Yes
LTC2911IDDB-1#TRMPBF 3x2 DFN-8 I $2.50 $1.80 Yes
LTC2911IDDB-1#TRPBF 3x2 DFN-8 I $2.50 $1.75 Yes
LTC2911IDDB-2#TRMPBF 3x2 DFN-8 I $2.50 $1.80 Yes
LTC2911IDDB-2#TRPBF 3x2 DFN-8 I $2.50 $1.75 Yes
LTC2911IDDB-3#TRMPBF 3x2 DFN-8 I $2.50 $1.80 Yes
LTC2911IDDB-3#TRPBF 3x2 DFN-8 I $2.50 $1.75 Yes
LTC2911IDDB-4#TRMPBF 3x2 DFN-8 I $2.50 $1.80 Yes
LTC2911IDDB-4#TRPBF 3x2 DFN-8 I $2.50 $1.75 Yes
LTC2911IDDB-5#TRMPBF 3x2 DFN-8 I $2.50 $1.80 Yes
LTC2911IDDB-5#TRPBF 3x2 DFN-8 I $2.50 $1.75 Yes
LTC2911ITS8-1#TRMPBF SOT-23 I $2.50 $1.80 Yes
LTC2911ITS8-1#TRPBF SOT-23 I $2.50 $1.75 Yes
LTC2911ITS8-2#TRMPBF SOT-23 I $2.50 $1.80 Yes
LTC2911ITS8-2#TRPBF SOT-23 I $2.50 $1.75 Yes
LTC2911ITS8-3#TRMPBF SOT-23 I $2.50 $1.80 Yes
LTC2911ITS8-3#TRPBF SOT-23 I $2.50 $1.75 Yes
LTC2911ITS8-4#TRMPBF SOT-23 I $2.50 $1.80 Yes
LTC2911ITS8-4#TRPBF SOT-23 I $2.50 $1.75 Yes
LTC2911ITS8-5#TRMPBF SOT-23 I $2.50 $1.80 Yes
LTC2911ITS8-5#TRPBF SOT-23 I $2.50 $1.75 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

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