LTC2917

FEATURES 9 Selectable Supply Voltages 12V, 5V, 3.3V, 2.5V, 1.8V 1.5V, 1.2V, 1V, +ADJ (0.5V) ■ 3 Selectable Tolerances –5%, –10%, –15% (LTC2917) ■ Manual Reset Input (LTC2918) ■ 1.5V to 5.5V Supply Operation www.DataSheet4U.com ■ Adjustable Watchdog Timeout ■ Windowed Watchdog Timeout for Higher Reliability Applications (LTC2917-B, LTC2918-B) ■ 6.2V Shunt Regulator for High Voltage Operation ■ Guaranteed to 125˚C ■ Guaranteed Threshold Accuracy: ±1.5% ■ Low Quiescent Current: 30μA Typical ■ Power Supply Glitch Immunity ■ Guaranteed ⎯R⎯S⎯T for V CC ≥ 0.8V ■ 10-Lead MSOP Packages and (3mm × 2mm) DFN Packages ■ LTC2917/LTC2918 Low Voltage Supervisor with 27 Selectable Thresholds and Watchdog Timer DESCRIPTION The LTC®2917-A/LTC2917-B and LTC2918-A/LTC2918-B are low voltage single-supply monitors with selectable thresholds and an adjustable watchdog timer. 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 LTC2917, an additional three state input determines the tolerance (–5%, –10%, –15%). The tolerance for the LTC2918 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 and the watchdog timeout may be set with no external components, or adjusted using an external capacitor. A windowed w...