Description

The LTC2901 is a programmable supply monitor for systems with up to four supply voltages. It allows for the selection of one of 16 preset or adjustable voltage monitor combinations using an external resistor divider connected to the program pin. The preset voltage thresholds have an accuracy of ±1.5% over temperature. It also features separate pins for individual supply monitoring, with all four voltage comparator outputs connected to these pins.

Specifications and 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

Application Scenarios

- Desktop and Notebook Computers

- Multivoltage Systems

- Telecom Equipment

- Portable Battery-Powered Equipment

- Network Servers

Comparison