Voltage Supervisor with 27 Selectable Thresholds

The LTC2915/LTC2916 are low voltage single-supply monitors with selectable thresholds. The parts operate from 1.5V to 5.5V and consume a quiescent current of only 30µA.

Two three-state inputs select one of nine internally programmed thresholds without the need for external resistors. For the LTC2915, an additional three-state input determines the tolerance (–5%, –10%, –15%). The tolerance for the LTC2916 is fixed at –5%. Threshold accuracy is guaranteed at ±1.5% over the entire operating temperature range. Glitch filtering ensures reliable reset operation without false triggering.

The reset timeout may be set to 200ms or adjusted using an external capacitor. A separate manual reset input on the LTC2916 allows a simple push button interface.

Operation to 125°C makes the LTC2915 and LTC2916 suitable for automotive applications.

Applications

* Handheld Devices

* Cell Phone Base Stations

* Automotive Control Systems

* Network Servers

* Optical Networking Systems

* 9 Selectable Supply Voltages

* 12V, 5V, 3.3V, 2.5V, 1.8V

* 1.5V, 1.2V, 1.0V, +ADJ (0.5V)

* 3 Selectable Tolerances

* –5%, –10%, –15% (LTC2915)

* Manual Reset Input (LTC2916)

* 1.5V to 5.5V Supply Operation

* 6.2V Shunt Regulator for High Voltage Operation

* Guaranteed Operation to 125°C

* Guaranteed Threshold Accuracy: ±1.5%

* Low Quiescent Current: 30µA Typical

* Power Supply Glitch Immunity

* Guaranteed RST for VCC = 0.8V

* Low Profile (1mm) 8-Lead TSOT-23 (ThinSOT™) and(3mm × 2mm) DFN Packages