DocumentationDatasheet
Reliability Data
Product Selector Card
Press Release
cad_symbol
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) - ±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
3.3V, 1.8V, ADJ (LTC2911-3)
3.3V, 1.2V, ADJ (LTC2911-4)
3.3V, ADJ, ADJ (LTC2911-5)
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.
3x2 DFN-8,SOT-23
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC2911CDDB-1#TRMPBF | DFN | 8 | C | $2.17 | $1.57 |
| LTC2911CDDB-1#TRPBF | DFN | 8 | C | $2.17 | $1.52 |
| LTC2911CDDB-2#TRMPBF | DFN | 8 | C | $2.17 | $1.57 |
| LTC2911CDDB-2#TRPBF | DFN | 8 | C | $2.17 | $1.52 |
| LTC2911CDDB-3#TRMPBF | DFN | 8 | C | $2.17 | $1.57 |
| LTC2911CDDB-3#TRPBF | DFN | 8 | C | $2.17 | $1.52 |
| LTC2911CDDB-4#TRMPBF | DFN | 8 | C | $2.17 | $1.57 |
| LTC2911CDDB-4#TRPBF | DFN | 8 | C | $2.17 | $1.52 |
| LTC2911CDDB-5#TRMPBF | DFN | 8 | C | $2.17 | $1.57 |
| LTC2911CDDB-5#TRPBF | DFN | 8 | C | $2.17 | $1.52 |
| LTC2911CTS8-1#TRMPBF | SOT | 8 | C | $2.17 | $1.57 |
| LTC2911CTS8-1#TRPBF | SOT | 8 | C | $2.17 | $1.52 |
| LTC2911CTS8-2#TRMPBF | SOT | 8 | C | $2.17 | $1.57 |
| LTC2911CTS8-2#TRPBF | SOT | 8 | C | $2.17 | $1.52 |
| LTC2911CTS8-3#TRMPBF | SOT | 6 | C | $2.17 | $1.57 |
| LTC2911CTS8-3#TRPBF | SOT | 8 | C | $2.17 | $1.52 |
| LTC2911CTS8-4#TRMPBF | SOT | 8 | C | $2.17 | $1.57 |
| LTC2911CTS8-4#TRPBF | SOT | 8 | C | $2.17 | $1.52 |
| LTC2911CTS8-5#TRMPBF | SOT | 8 | C | $2.17 | $1.57 |
| LTC2911CTS8-5#TRPBF | SOT | 8 | C | $2.17 | $1.52 |
| LTC2911HDDB-1#TRMPBF | DFN | 8 | H | $2.87 | $2.06 |
| LTC2911HDDB-1#TRPBF | DFN | 8 | H | $2.87 | $2.01 |
| LTC2911HDDB-2#TRMPBF | DFN | 8 | H | $2.87 | $2.06 |
| LTC2911HDDB-2#TRPBF | DFN | 8 | H | $2.87 | $2.01 |
| LTC2911HDDB-3#TRMPBF | DFN | 8 | H | $2.87 | $2.06 |
| LTC2911HDDB-3#TRPBF | DFN | 8 | H | $2.87 | $2.01 |
| LTC2911HDDB-4#TRMPBF | DFN | 8 | H | $2.87 | $2.06 |
| LTC2911HDDB-4#TRPBF | DFN | 8 | H | $2.87 | $2.01 |
| LTC2911HDDB-5#TRMPBF | DFN | 8 | H | $2.87 | $2.06 |
| LTC2911HDDB-5#TRPBF | DFN | 8 | H | $2.87 | $2.01 |
| LTC2911HTS8-1#TRMPBF | SOT | 8 | H | $2.87 | $2.06 |
| LTC2911HTS8-1#TRPBF | SOT | 8 | H | $2.87 | $2.01 |
| LTC2911HTS8-2#TRMPBF | SOT | 8 | H | $2.87 | $2.06 |
| LTC2911HTS8-2#TRPBF | SOT | 8 | H | $2.87 | $2.01 |
| LTC2911HTS8-3#TRMPBF | SOT | 8 | H | $2.87 | $2.06 |
| LTC2911HTS8-3#TRPBF | SOT | 8 | H | $2.87 | $2.01 |
| LTC2911HTS8-4#PBF | SOT | 8 | H | $2.87 | |
| LTC2911HTS8-4#TRMPBF | SOT | 8 | H | $2.87 | $2.06 |
| LTC2911HTS8-4#TRPBF | SOT | 8 | H | $2.87 | $2.01 |
| LTC2911HTS8-5#TRMPBF | SOT | 8 | H | $2.87 | $2.06 |
| LTC2911HTS8-5#TRPBF | SOT | 8 | H | $2.87 | $2.01 |
| LTC2911IDDB-1#TRMPBF | DFN | 8 | I | $2.50 | $1.80 |
| LTC2911IDDB-1#TRPBF | DFN | 8 | I | $2.50 | $1.75 |
| LTC2911IDDB-2#TRMPBF | DFN | 8 | I | $2.50 | $1.80 |
| LTC2911IDDB-2#TRPBF | DFN | 8 | I | $2.50 | $1.75 |
| LTC2911IDDB-3#TRMPBF | DFN | 8 | I | $2.50 | $1.80 |
| LTC2911IDDB-3#TRPBF | DFN | 8 | I | $2.50 | $1.75 |
| LTC2911IDDB-4#TRMPBF | DFN | 8 | I | $2.50 | $1.80 |
| LTC2911IDDB-4#TRPBF | DFN | 8 | I | $2.50 | $1.75 |
| LTC2911IDDB-5#TRMPBF | DFN | 8 | I | $2.50 | $1.80 |
| LTC2911IDDB-5#TRPBF | DFN | 8 | I | $2.50 | $1.75 |
| LTC2911ITS8-1#TRMPBF | SOT | 8 | I | $2.50 | $1.80 |
| LTC2911ITS8-1#TRPBF | SOT | 8 | I | $2.50 | $1.75 |
| LTC2911ITS8-2#TRMPBF | SOT | 8 | I | $2.50 | $1.80 |
| LTC2911ITS8-2#TRPBF | SOT | 8 | I | $2.50 | $1.75 |
| LTC2911ITS8-3#TRMPBF | SOT | 8 | I | $2.50 | $1.80 |
| LTC2911ITS8-3#TRPBF | SOT | 8 | I | $2.50 | $1.75 |
| LTC2911ITS8-4#TRMPBF | SOT | 8 | I | $2.50 | $1.80 |
| LTC2911ITS8-4#TRPBF | SOT | 8 | I | $2.50 | $1.75 |
| LTC2911ITS8-5#TRMPBF | SOT | 8 | I | $2.50 | $1.80 |
| LTC2911ITS8-5#TRPBF | SOT | 8 | I | $2.50 | $1.75 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.