LTC2956 OPERATION OFF STATE: EN = 0 VLONG < VCC/2 OFFALERT = 1 POWER-ON ONALERT = 1 tOFF = TRUE t V SLEEP_MIN = TRUE AND LONG > VCC/2 PB = LOW SHUTTING OFF STATE: EN = 1 OFFALERT = 0 SHUTDOWN MODE FROM OFF STATE: ONALERT = 0 EN = 1 (PB = LOW FOR tLONG) OR (tONMAX = FALSE AND SLEEP = HIGH FOR tLONG) AWAKE STATE: EN = 1 tPERIOD RESTART PB = HIGH AND tSLEEP_MIN = TRUE AND tAWAKE_MIN = TRUE AND (tPERIOD = TRUE OR (SLEEP↓ = TRUE OR PB = LOW OR tONMAX = TRUE) SLEEP = HIGH) SLEEP STATE: EN = 0 ONALERT = 1 OFFALERT = 1 RUN MODE 2956 F01 Figure 1. Functional State Diagram 2956fa For more information www.linear.com/LTC2956 9