LTC2901 - Programmable Quad Supply Monitor with Adjustable Reset and Watchdog Timers
Features
- Simultaneously Monitors Four Supplies
- 16 User Selectable Combinations of 5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V and/or ±Adj Voltage Thresholds
- Guaranteed Threshold Accuracy: ±1.5% of Monitored Voltage Over Temperature
- Selectable Supply Tolerance: 5% and 10% Below Monitored Voltage (LTC2901-3/LTC2901-4)
- Low Supply Current: 43µA Typ
- Adjustable Reset Time
- Adjustable Watchdog Time
- Open-Drain RST Output (LTC2901-1/LTC2901-3)
- Push-Pull RST Output (LTC2901-2/LTC2901-4)
- Individual Nondelayed Monitor Output for Each Supply
- Power Supply Glitch Immunity
- Guaranteed RST for VCC ≥ 1V
- 16-Lead Narrow SSOP Package
Typical Application
Description
The LTC2901 is a programmable supply monitor for systems with up to four supply voltages. One of 16 preset or adjustable voltage monitor combinations can be selected using an external resistor divider connected to the program pin. The preset voltage thresholds are accurate to ±1.5% over temperature. All four voltage comparator outputs are connected to separate pins for individual supply monitoring.
The reset and watchdog delay times are adjustable using external capacitors. Tight voltage threshold accuracy and glitch immunity ensure reliable reset operation without false triggering. The RST output is guaranteed to be in the correct state for VCC down to 1V. The LTC2901-1/LTC2901-3 features an open-drain RST output, while the LTC2901-2/LTC2901-4 has a push-pull RST output.
The 43µA supply current makes the LTC2901 ideal for power conscious systems and it may be configured to monitor less than four inputs. The parts are available in the 16-lead narrow SSOP package.
Patent Pending.
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 |
|---|---|---|---|---|---|
| LTC2901-1CGN#PBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LTC2901-1CGN#TRPBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LTC2901-1IGN#PBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | Yes |
| LTC2901-1IGN#TRPBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | Yes |
| LTC2901-2CGN#PBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LTC2901-2CGN#TRPBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LTC2901-2IGN#PBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | Yes |
| LTC2901-2IGN#TRPBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | Yes |
| LTC2901-3CGN#PBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LTC2901-3CGN#TRPBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LTC2901-3IGN#PBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | Yes |
| LTC2901-3IGN#TRPBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | Yes |
| LTC2901-4CGN#PBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LTC2901-4CGN#TRPBF | SSOP-16 | GN | C | 05-08-1641 (GN16) | Yes |
| LTC2901-4IGN#PBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | Yes |
| LTC2901-4IGN#TRPBF | SSOP-16 | GN | I | 05-08-1641 (GN16) | 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 | |
|---|---|---|---|---|---|---|
| LTC2901-1CGN#PBF | SSOP-16 | C | $2.95 | $2.35 | Yes | |
| LTC2901-1CGN#TRPBF | SSOP-16 | C | $2.41 | Yes | ||
| LTC2901-1IGN#PBF | SSOP-16 | I | $3.40 | $2.70 | Yes | |
| LTC2901-1IGN#TRPBF | SSOP-16 | I | $2.76 | Yes | ||
| LTC2901-2CGN#PBF | SSOP-16 | C | $2.95 | $2.35 | Yes | |
| LTC2901-2CGN#TRPBF | SSOP-16 | C | $2.41 | Yes | ||
| LTC2901-2IGN#PBF | SSOP-16 | I | $3.40 | $2.70 | Yes | |
| LTC2901-2IGN#TRPBF | SSOP-16 | I | $2.76 | Yes | ||
| LTC2901-3CGN#PBF | SSOP-16 | C | $2.95 | $2.35 | Yes | |
| LTC2901-3CGN#TRPBF | SSOP-16 | C | $2.41 | Yes | ||
| LTC2901-3IGN#PBF | SSOP-16 | I | $3.40 | $2.70 | Yes | |
| LTC2901-3IGN#TRPBF | SSOP-16 | I | $2.76 | Yes | ||
| LTC2901-4CGN#PBF | SSOP-16 | C | $2.95 | $2.35 | Yes | |
| LTC2901-4CGN#TRPBF | SSOP-16 | C | $2.41 | Yes | ||
| LTC2901-4IGN#PBF | SSOP-16 | I | $3.40 | $2.70 | Yes | |
| LTC2901-4IGN#TRPBF | SSOP-16 | I | $2.76 | 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
Applications
- Desktop and Notebook Computers
- Multivoltage Systems
- Telecom Equipment
- Portable Battery-Powered Equipment
- Network Servers
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