LTC3537 ELECTRICAL CHARACTERISTICSThe l denotes the specifi cations which apply over the full operatingtemperature range, otherwise specifi cations are at TA = 25°C. (Note 2) VINL = 3.3V, VOLDO = 3V, unless otherwise noted.SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITS PSRR Ripple Rejection f = 2.2MHz at ILOAD = 100mA (Note 3) 24 dB ISHORT Short Circuit Current Limit VOLDO = 0V l 110 150 mA VENLDOH ENLDO Input High Voltage 0.8 V VENLDOL ENLDO Input Low Voltage 0.3 V IENLDO ENLDO Input Current VENLDO = 5.5V 1.5 μA VPGDLLOW PGDL Voltage Low IPGDL = 5mA 200 mV IPGDLLEAK PGDL Leakage Current VPGDL = 5.5V 0.01 1 μA PGDL Trip Point VFBL Rising 96 % VOLDO PGDL Hysteresis 3 % Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 4: Current measurements are made when the output is not switching. may cause permanent damage to the device. Exposure to any Absolute Note 5: This IC includes overtemperature protection that is intended Maximum Rating condition for extended periods may affect device to protect the device during momentary overload conditions. Junction reliability and lifetime. temperature will exceed 125°C when overtemperature protection is active. Note 2: The LTC3537 is guaranteed to meet performance specifi cations Continuous operation above the specifi ed maximum operating junction from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating temperature may result in device degradation or failure. temperature range are assured by design, characterization and correlation Note 6: Failure to solder the exposed backside of the package to the PC with statistical process controls. board ground plane will result in a thermal resistance much higher than Note 3: Specifi cation is guaranteed by design and not 100% tested in 68°C/W. production. 3537fd 4
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