DocumentationDatasheet
Reliability Data
Product Selector Card
LT Journal
cad_symbol
Features
- Simultaneously Monitors Four Supplies
- 16 User Selectable Combinations of 5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V and/or ±Adjustable Voltage Thresholds
- Guaranteed Threshold Accuracy: ±1.5% of Monitored Voltage Over Temperature
- Low Supply Current: 43µA Typ
- Adjustable Reset Time
- Small MSOP and 3mm x 3mm DFN Packages
- Manual Reset Pin
- Open-Drain RST Output (LTC2900-1)
- Push-Pull RST Output (LTC2900-2)
- Power Supply Glitch Immunity
- Guaranteed RST for VCC >/= 1V
Typical Application
Description
The LTC™2900 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.
The reset delay time is adjustable using an external capacitor and the manual reset input may be used with a momentary switch to issue reset pulses with programmed duration. 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 LTC2900-1 features an open-drain RST output, while the LTC2900-2 has a push-pull RST output.
The 43µA supply current makes the LTC2900 ideal for power conscious systems and it may be configured to monitor less than four inputs. The parts are available in the 10-lead MSOP and the 10-lead 3mm x 3mm DFN packages.
3x3 DFN-10,MS-10
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC2900-1CDD#PBF | DFN | 10 | C | $2.55 | $2.05 |
| LTC2900-1CDD#TRPBF | DFN | 10 | C | $2.15 | |
| LTC2900-1CMS#PBF | MSOP | 10 | C | $2.30 | $1.85 |
| LTC2900-1CMS#TRPBF | MSOP | 10 | C | $1.91 | |
| LTC2900-1IDD#PBF | DFN | 10 | I | $2.90 | $2.40 |
| LTC2900-1IDD#TRPBF | DFN | 10 | I | $2.50 | |
| LTC2900-1IMS#PBF | MSOP | 10 | I | $2.70 | $2.15 |
| LTC2900-1IMS#TRPBF | MSOP | 10 | I | $2.21 | |
| LTC2900-2CDD#PBF | DFN | 10 | C | $2.55 | $2.05 |
| LTC2900-2CDD#TRPBF | DFN | 10 | C | $2.15 | |
| LTC2900-2CMS#PBF | MSOP | 10 | C | $2.30 | $1.85 |
| LTC2900-2CMS#TRPBF | MSOP | 10 | C | $1.91 | |
| LTC2900-2IDD#PBF | DFN | 10 | I | $2.90 | $2.40 |
| LTC2900-2IDD#TRPBF | DFN | 10 | I | $2.50 | |
| LTC2900-2IMS#PBF | MSOP | 10 | I | $2.70 | $2.15 |
| LTC2900-2IMS#TRPBF | MSOP | 10 | I | $2.21 | |
| LTC2900-1CMS | MSOP | 10 | C | $4.60 | $3.70 |
| LTC2900-1CMS#TR | MSOP | 10 | C | $3.82 | |
| LTC2900-2CMS | MSOP | 10 | C | $4.60 | $3.70 |
| LTC2900-2CMS#TR | MSOP | 10 | C | $3.82 | |
| LTC2900-1IMS | MSOP | 10 | I | $5.40 | $4.30 |
| LTC2900-1IMS#TR | MSOP | 10 | I | $4.42 | |
| LTC2900-2IMS | MSOP | 10 | I | $5.40 | $4.30 |
| LTC2900-2IMS#TR | MSOP | 10 | I | $4.42 | |
| LTC2900-1CDD | DFN | 10 | C | $5.10 | $4.10 |
| LTC2900-1CDD#TR | DFN | 10 | C | $4.30 | |
| LTC2900-1IDD | DFN | 10 | I | $5.80 | $4.80 |
| LTC2900-1IDD#TR | DFN | 10 | I | $5.00 | |
| LTC2900-2CDD | DFN | 10 | C | $5.10 | $4.10 |
| LTC2900-2CDD#TR | DFN | 10 | C | $4.30 | |
| LTC2900-2IDD | DFN | 10 | I | $5.80 | $4.80 |
| LTC2900-2IDD#TR | DFN | 10 | I | $5.00 |
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.