DC1033B

DC1033B demonstration circuit features the LTC2952, a micropower, multipurpose, pushbutton On/Off PowerPath™ controller that provides voltage monitoring and supervisory features, as well as ideal diode power paths. Selectable PowerPath management modes allow a variety of power on and off configurations, including pushbutton on/off control and voltage detection on/off control. The LTC2952’s pushbutton input has independently programmable ON and OFF de-bounce times. A simple microprocessor interface allows for proper system housekeeping prior to power down. The status of digital pins G1STAT, active low (PFO, RST and INT) are displayed with LEDs. Under system fault conditions, the part’s internal active low (KILL) timer ensures that the system can be shut down. High reliability systems may utilize the LTC2952’s power fail, voltage monitoring, diode status, watchdog and μP reset features to monitor power status and ensure system integrity.

• DC1033B operates over full LTC2952 range of 2.7V to 28V
• 3.055V power fail input voltage PFI (default resistors (R3 and R4) monitor VS)
• 2.325V voltage monitor VM (default resistors (R1 and R2) monitor 2P6V)
• 26ms pushbutton on time ONT (JP3 set to OPEN, LTC2952 default ONT)