LTC2909

PRODUCTION

Precision Triple/Dual Input UV, OV and Negative Voltage Monitor

Part Models: 24
1ku List Price: Starting From $1.92

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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: V_CC = 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 V_CC (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

Part Models: 24
1ku List Price: Starting From $1.92

Documentation

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)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909CDDB-2.5#TRPBF	8-Lead DFN (3mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909CDDB-3.3#TRMPBF	8-Lead DFN (3mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909CDDB-3.3#TRPBF	8-Lead DFN (3mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909CDDB-5#TRMPBF	8-Lead DFN (3mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909CDDB-5#TRPBF	8-Lead DFN (3mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909CTS8-2.5#TRMPBF	8-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909CTS8-2.5#TRPBF	8-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909CTS8-3.3#TRMPBF	8-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909CTS8-3.3#TRPBF	8-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909CTS8-5#TRMPBF	8-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909CTS8-5#TRPBF	8-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909IDDB-2.5#TRMPBF	8-Lead DFN (3mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909IDDB-2.5#TRPBF	8-Lead DFN (3mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909IDDB-3.3#TRMPBF	8-Lead DFN (3mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909IDDB-3.3#TRPBF	8-Lead DFN (3mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909IDDB-5#TRMPBF	8-Lead DFN (3mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909IDDB-5#TRPBF	8-Lead DFN (3mm x 2mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909ITS8-2.5#TRMPBF	8-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909ITS8-2.5#TRPBF	8-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909ITS8-3.3#TRMPBF	8-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909ITS8-3.3#TRPBF	8-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909ITS8-5#TRMPBF	8-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2909ITS8-5#TRPBF	8-Lead SOT-23	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC2909-25
LTC2909-33
LTC2909-50

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.

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LTC2909

Overview

Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 1

Product Selector Card 1