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LTC3577 Datasheet(PDF) 9 Page - Linear Technology |
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LTC3577 Datasheet(HTML) 9 Page - Linear Technology |
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9 / 52 page  LTC3577/LTC3577-1 9 3577f ELECTRICAL CHARACTERISTICS Pushbutton Controller. The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VOUT = 3.8V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Pushbutton Pin (ON) VOUT Pushbutton Operating Supply Range (Note 9) l 2.7 5.5 V VOUT UVLO VOUT Falling VOUT Rising Pushbutton is Disabled Below VOUT UVLO 2.5 2.7 2.8 2.9 V V VON_TH ON Threshold Rising ON Threshold Falling 0.4 0.8 0.7 1.2 V V ION ON Input Current VON = VOUT VON = 0V –1 –4 –9 1 –14 μA μA Power-On Input Pin (PWR_ON) VPWR_ON PWR_ON Threshold Rising PWR_ON Threshold Falling 0.4 0.8 0.7 1.2 V V IPWR_ON PWR_ON Input Current VPWR_ON = 3V –1 1 μA Status Output Pins (PBSTAT, WAKE, PG_DCDC) IPBSTAT PBSTAT Output High Leakage Current VPBSTAT = 3V –1 1 μA VPBSTAT PBSTAT Output Low Voltage IPBSTAT = 3mA 0.1 0.4 V IWAKE Wake Output High Leakage Current VWAKE = 3V –1 1 μA VWAKE Wake Low Output Voltage IWAKE = 3mA 0.1 0.4 V IPG_DCDC PG_DCDC Output High Leakage Current VPG_DCDC = 3V –1 1 μA VPG_DCDC PG_DCDC Output Low Voltage IPG_DCDC = 3mA 0.1 0.4 V VTHPG_DCDC PG_DCDC Threshold Voltage (Note 13) –8 % Pushbutton Timing Parameters tON_PBSTAT1 ON Low Time to PBSTAT Low WAKE High 50 ms tON_PBSTAT2 ON High to PBSTAT High PBSTAT Low > tPBSTAT_PW 900 μs tON_WAKE ON Low Time to WAKE High WAKE Low > tPWR_ONBK2 400 ms tON_HR ON Low to Hard Reset Hard Reset = All Supplies Disabled 4.2 5 5.8 Seconds tPBSTAT_PW PBSTAT Minimum Pulse Width 40 50 60 ms tWAKE_EXTP WAKE High from USB or Wall Present WAKE Low > tPWR_ONBK2 100 ms tWAKE_DCDC WAKE High to Buck1 Enable WAKE Low > tPWR_ONBK2 5μs tPWR_ONH PWR_ON High to WAKE High WAKE Low > tPWR_ONBK2 50 ms tPWR_ONL PWR_ON Low to WAKE Low WAKE High > tPWR_ONBK1 50 ms tPWR_ONBK1 PWR_ON Power-Up Blanking WAKE Rising Until PWR_ON Low Recognized 5 Seconds tPWR_ONBK2 PWR_ON Power-Down Blanking WAKE Falling Until PWR_ON High Recognized 1 Seconds tPG_DCDCH Bucks in Regulation to PG_DCDC High All Bucks Within PG_DCDC Threshold Voltage 230 ms tPG_DCDCL Bucks Disabled to PG_DCDC Low All Bucks Disabled 44 μs Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC3577E/LTC3577E-1 are guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. Note 3: This IC includes over temperature protection that is intended to protect the device during momentary overload conditions. Junction temperatures will exceed 110°C when over temperature protection is active. Continuous operation above the specified maximum operating junction temperature may result in device degradation or failure. |
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