LTC2956 ELECTRICAL CHARACTERISTICSThe l denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25°C. VIN = 3.3V, RCOM = 100k unless otherwise noted. (Note 2) SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITS VIN Supply Voltage Range l 1.5 36 V IIN VIN Supply Current Awake State, PB Hi l 3 10 µA Sleep State, PB Hi l 0.8 3 µA Off State, PB Hi l 0.3 1 µA VUVL VIN Undervoltage Lockout VIN Rising l 1.08 1.24 1.4 V VUVL(HYST) VIN Undervoltage Lockout Hysteresis 100 mV Wake-Up Timer tPERIOD Period Accuracy RPERIOD = 100kΩ l 237 250 263 ms RPERIOD Period-Setting Resistor Range l 32.4 324 kΩ Timing (Refer to Timing Diagram) tSLEEP_MIN Minimum Sleep Duration l 76 128 180 ms tAWAKE_MIN Minimum Awake Time l 4 8 12 ms tONMAX Maximum Awake Time SLEEP = 0V, CONMAX = 3900pF l 32 52 72 ms tDB PB Debounce Time PB Goes Low → EN Goes High l 19 32 45 ms tPD(SLEEP) SLEEP Propagation Delay SLEEP → EN Transitions l 2 4 ms tPBOUT_FIRST Width of First PBOUT Pulse After Entering Awake State l 76 128 180 ms tLONG Long Power Down Time RLONG = 9.76k, RCOM = 100k l 76 128 180 ms RLONG = Open, RCOM = 100k l 9.83 16.4 22.9 s tOFF OFFALERT Pulse Width PB = 2V l 0.6 1 1.4 s Input Pins: PB, ONMAX, SLEEP VPB(MIN,MAX) PB Voltage Range l –36 36 V IPB PB Input Current PB = 0V l –1 –4 –8 µA PB = –36V –400 µA VPB(TH) PB Input Threshold PB Falling l 0.5 0.9 1.5 V VPB(HYST) PB Input Hysteresis 0.7 V VPB(OC) PB Open Circuit Voltage IPB = 0µA, –1µA l 1.5 V RPB PB Pull-Up Resistance l 0.45 0.9 1.35 MΩ VSLEEP(TH) SLEEP Input Threshold Voltage SLEEP Falling l 0.7 1 1.3 V VSLEEP(HYST) SLEEP Input Hysteresis 80 mV ISLEEP SLEEP Leakage Current SLEEP = 1V l 0 ±100 nA VONMAX(TH) ONMAX Input Threshold Voltage ONMAX Rising l 0.6 1 1.5 V IONMAX ONMAX Pull-Up Current ONMAX = 0V l –1.1 –2 –2.8 µA 2956fa For more information www.linear.com/LTC2956 3
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