LTC2905 - Precision Dual Supply Monitor with Pin-Selectable Thresholds
Features
- Monitors Two Inputs Simultaneously
- Nine Threshold Combinations
- Three Supply Tolerances (5%, 7.5%, 10%)
- Guaranteed Threshold Accuracy: ±1.5% of Monitored Voltage Over Temperature
- Internal VCC Auto Select
- Power Supply Glitch Immunity
- 200ms Reset Time Delay (LTC2904 Only)
- Adjustable Reset Time Delay (LTC2905 Only)
- Open Drain RST Output
- Guaranteed RST for V1 ≥ 1V or V2 ≥ 1V
- Low Profile (1mm) SOT-23 (ThinSOT™) and Plastic (3mm x 2mm) DFN Packages
AEC-Q100 data available for specific packages
Typical Application
Description
The LTC2904/LTC2905 are dual supply monitors intended for systems with two supply voltages. The dual supply monitors have a common reset output with delay (200ms for the LTC2904 and adjustable using an external capacitor for the LTC2905). This product provides a precise, space-conscious and micropower solution for supply monitoring.
The LTC2904/LTC2905 feature a tight 1.5% threshold accuracy over the whole operating temperature range, and glitch immunity to ensure reliable reset operation without false triggering. The open drain RST output is guaranteed to be in the correct state for inputs down to 1V.
The LTC2904/LTC2905 also feature three programming input pins, which program the threshold and tolerance level without requiring any external components. These three programming pins provide a total of 27 different voltage level and tolerance combinations, eliminating the need to have different parts for development and implementation of different systems with different voltage levels requiring monitoring function.
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 |
|---|---|---|---|---|---|
| LTC2905CDDB#PBF | 3x2 DFN-8 | DDB | C | 05-08-1702 | Yes |
| LTC2905CDDB#TRMPBF | 3x2 DFN-8 | DDB | C | 05-08-1702 | Yes |
| LTC2905CDDB#TRPBF | 3x2 DFN-8 | DDB | C | 05-08-1702 | Yes |
| LTC2905CTS8#PBF | SOT-23 | TS8 | C | 05-08-1637 | Yes |
| LTC2905CTS8#TRMPBF | SOT-23 | TS8 | C | 05-08-1637 | Yes |
| LTC2905CTS8#TRPBF | SOT-23 | TS8 | C | 05-08-1637 | Yes |
| LTC2905HDDB#PBF | 3x2 DFN-8 | DDB | H | 05-08-1702 | Yes |
| LTC2905HDDB#TRMPBF | 3x2 DFN-8 | DDB | H | 05-08-1702 | Yes |
| LTC2905HDDB#TRPBF | 3x2 DFN-8 | DDB | H | 05-08-1702 | Yes |
| LTC2905HTS8#PBF | SOT-23 | TS8 | H | 05-08-1637 | Yes |
| LTC2905HTS8#TRMPBF | SOT-23 | TS8 | H | 05-08-1637 | Yes |
| LTC2905HTS8#TRPBF | SOT-23 | TS8 | H | 05-08-1637 | Yes |
| LTC2905IDDB#PBF | 3x2 DFN-8 | DDB | I | 05-08-1702 | Yes |
| LTC2905IDDB#TRMPBF | 3x2 DFN-8 | DDB | I | 05-08-1702 | Yes |
| LTC2905IDDB#TRPBF | 3x2 DFN-8 | DDB | I | 05-08-1702 | Yes |
| LTC2905ITS8#PBF | SOT-23 | TS8 | I | 05-08-1637 | Yes |
| LTC2905ITS8#TRMPBF | SOT-23 | TS8 | I | 05-08-1637 | Yes |
| LTC2905ITS8#TRPBF | SOT-23 | TS8 | I | 05-08-1637 | Yes |
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 | |
|---|---|---|---|---|---|---|
| LTC2905CDDB#PBF | 3x2 DFN-8 | C | $1.97 | Yes | ||
| LTC2905CDDB#TRMPBF | 3x2 DFN-8 | C | $1.97 | $1.43 | Yes | |
| LTC2905CDDB#TRPBF | 3x2 DFN-8 | C | $1.97 | $1.41 | Yes | |
| LTC2905CTS8#PBF | SOT-23 | C | $1.97 | Yes | ||
| LTC2905CTS8#TRMPBF | SOT-23 | C | $1.97 | $1.43 | Yes | |
| LTC2905CTS8#TRPBF | SOT-23 | C | $1.97 | $1.41 | Yes | |
| LTC2905HDDB#PBF | 3x2 DFN-8 | H | $2.46 | Yes | ||
| LTC2905HDDB#TRMPBF | 3x2 DFN-8 | H | $2.46 | $1.77 | Yes | |
| LTC2905HDDB#TRPBF | 3x2 DFN-8 | H | $2.46 | $1.72 | Yes | |
| LTC2905HTS8#PBF | SOT-23 | H | $2.46 | Yes | ||
| LTC2905HTS8#TRMPBF | SOT-23 | H | $2.46 | $1.77 | Yes | |
| LTC2905HTS8#TRPBF | SOT-23 | H | $2.46 | $1.72 | Yes | |
| LTC2905IDDB#PBF | 3x2 DFN-8 | I | $2.23 | Yes | ||
| LTC2905IDDB#TRMPBF | 3x2 DFN-8 | I | $2.23 | $1.58 | Yes | |
| LTC2905IDDB#TRPBF | 3x2 DFN-8 | I | $2.23 | $1.56 | Yes | |
| LTC2905ITS8#PBF | SOT-23 | I | $2.23 | Yes | ||
| LTC2905ITS8#TRMPBF | SOT-23 | I | $2.23 | $1.58 | Yes | |
| LTC2905ITS8#TRPBF | SOT-23 | I | $2.23 | $1.56 | Yes | |
| Buy Now • Request Samples | ||||||
Demo Boards
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.Click here to view our complete list of demo boards
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC2905HDDB#PBF | 3x2 DFN-8 | H | $2.46 | Yes | ||
| LTC2905HDDB#TRMPBF | 3x2 DFN-8 | H | $2.46 | $1.77 | Yes | |
| LTC2905HDDB#TRPBF | 3x2 DFN-8 | H | $2.46 | $1.72 | Yes | |
| LTC2905HTS8#PBF | SOT-23 | H | $2.46 | Yes | ||
| LTC2905HTS8#TRMPBF | SOT-23 | H | $2.46 | $1.77 | Yes | |
| LTC2905HTS8#TRPBF | SOT-23 | H | $2.46 | $1.72 | Yes | |
| LTC2905IDDB#PBF | 3x2 DFN-8 | I | $2.23 | Yes | ||
| LTC2905IDDB#TRMPBF | 3x2 DFN-8 | I | $2.23 | $1.58 | Yes | |
| LTC2905IDDB#TRPBF | 3x2 DFN-8 | I | $2.23 | $1.56 | Yes | |
| LTC2905ITS8#PBF | SOT-23 | I | $2.23 | Yes | ||
| LTC2905ITS8#TRMPBF | SOT-23 | I | $2.23 | $1.58 | Yes | |
| LTC2905ITS8#TRPBF | SOT-23 | I | $2.23 | $1.56 | Yes | |
| Buy Now • Request Samples | ||||||
Applications
- Desktop and Notebook Computers
- Handheld Devices
- Network Servers
- Core, I/O Monitor
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Design Tools
LTspice
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Models for the following parts are available in LTspice:
LTC2905
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
