LTC3422 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25 ° C. VIN = 1.2V, VOUT = 3.3V, RT = 28k, unless otherwise noted. (Note 2)PARAMETERCONDITIONSMINTYPMAXUNITS SHDN Input High VOUT = 0V (Turn-On Threshold, Initial Start-Up) 1 V VOUT > 2.4V (Stay-On Threshold) 0.65 V SHDN Input Low Turn-Off Threshold 0.25 V SHDN Input Current VSHDN = 3.3V ● 0.01 1 µA Error Amp Transconductance 50 µS Soft-Start Current Source VSS = 1V –5 –2.4 –1.2 µA BURST Threshold Voltage Falling Edge, Sensed at the BURST Pin 0.79 0.88 0.97 V Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 3: Once VOUT is greater than 2.4V, the LTC3422 is not dependent on may cause permanent damage to the device. Exposure to any Absolute the VIN supply. Maximum Rating condition for extended periods may affect device Note 4: Current is measured into the VOUT pin since the supply current is reliabilty and lifetime. bootstrapped to the output. The current will reflect to the input supply by Note 2: The LTC3422E is guaranteed to meet performance specifications (VOUT/VIN) • Efficiency. The outputs are not switching. from 0°C to 85°C. Specifications over the –40°C to 85°C operating Note 5: This IC includes overtemperature protection that is intended to temperature range are assured by design, characterization and correlation protect the device during momentary overload conditions. Junction with statistical process controls. temperature will exceed 125°C when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device reliability. 3422fa 3
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