LTC2909
LTC2909
PRODUCTIONPrecision Triple/Dual Input UV, OV and Negative Voltage Monitor
- Part Models
- 24
- 1ku List Price
- Starting From $2.44
Viewing:
Overview
- Two Low Voltage Adjustable Inputs (0.5V)
- Pin Selectable Input Polarity Allows Negative and OV Monitoring
- Guaranteed Threshold Accuracy: ±1.5%
- 6.5V Shunt Regulator for High Voltage Operation
- Low 50μA Quiescent Current
- Buffered 1V Reference for Negative Supply Offset
- Input Glitch Rejection
- Adjustable Reset Timeout Period
- Selectable Internal Timeout Saves Components
- Open-Drain RST Output
- Accurate UVLO for 2.5V, 3.3V, 5V Systems
- Ultralow Voltage Reset: VCC = 0.5V Guaranteed
- Space Saving 8-Lead TSOT-23 and 3mm × 2mm DFN Packages
The LTC2909 is a dual input monitor intended for a variety of system monitoring applications. Polarity selection and a buffered reference output allow the LTC2909 to monitor positive and negative supplies for undervoltage (UV) and overvoltage (OV) conditions.
The two inputs have a nominal 0.5V threshold, featuring tight 1.5% threshold accuracy over the entire operating temperature range. Glitch filtering ensures reliable reset operation without false triggering. A third fixed-threshold UVLO monitor on the part’s VCC (also 1.5% accuracy) is available for standard logic supplies.
The common reset output has a timeout that may use a preset 200ms, be set by an external capacitor or be disabled. A three-state input pin sets the input polarity of each adjustable input without requiring any external components.
The LTC2909 provides a highly versatile, precise, space-conscious, micropower solution for supply monitoring.
Applications
- Desktop and Notebook Computers
- Handheld Devices
- Network Servers
- Core, I/O Monitor
- Automotive
Documentation
Data Sheet 1
Technical Articles 1
Product Selector Card 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC2909CDDB-2.5#TRMPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC2909CDDB-2.5#TRPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC2909CDDB-3.3#TRMPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC2909CDDB-3.3#TRPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC2909CDDB-5#TRMPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC2909CDDB-5#TRPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC2909CTS8-2.5#TRMPBF | 8-Lead SOT-23 | ||
| LTC2909CTS8-2.5#TRPBF | 8-Lead SOT-23 | ||
| LTC2909CTS8-3.3#TRMPBF | 8-Lead SOT-23 | ||
| LTC2909CTS8-3.3#TRPBF | 8-Lead SOT-23 | ||
| LTC2909CTS8-5#TRMPBF | 8-Lead SOT-23 | ||
| LTC2909CTS8-5#TRPBF | 8-Lead SOT-23 | ||
| LTC2909IDDB-2.5#TRMPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC2909IDDB-2.5#TRPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC2909IDDB-3.3#TRMPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC2909IDDB-3.3#TRPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC2909IDDB-5#TRMPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC2909IDDB-5#TRPBF | 8-Lead DFN (3mm x 2mm w/ EP) | ||
| LTC2909ITS8-2.5#TRMPBF | 8-Lead SOT-23 | ||
| LTC2909ITS8-2.5#TRPBF | 8-Lead SOT-23 | ||
| LTC2909ITS8-3.3#TRMPBF | 8-Lead SOT-23 | ||
| LTC2909ITS8-3.3#TRPBF | 8-Lead SOT-23 | ||
| LTC2909ITS8-5#TRMPBF | 8-Lead SOT-23 | ||
| LTC2909ITS8-5#TRPBF | 8-Lead SOT-23 |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LTC2909-2.5
- LTC2909-3.3
- LTC2909-5
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.