ANALOG DEVICES DC1099A Demonstration Board, LTC2953, Pushbutton On/Off Controller

DC1099A demonstration circuit features the LTC2953, a push button On/Off controller that manages system power via a push button interface. An enable output toggles system power while an interrupt output provides debounced push button status. The interrupt output can be used in menu driven applications to request a system power down. The length of time that the push button must be held low for a power down is configurable with an external capacitor. The LTC2953 allows a user to force an immediate power down by tying /INT with /KILL and a push button turn off. The LTC2953 also features input and output supply monitors. An uncommitted power fail comparator provides real time input monitor threshold information, while a de-glitched under voltage lockout comparator gracefully initiates a system power down. The under voltage lockout comparator prevents from powering from a bad battery.

• Input voltage range from 2.7V to 27V
• 32ms turn on debounce time at push button turn on
• 30mV UVLO input hysteresis at UVLO pin

Notes

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