LTC3459 ELECTRICAL CHARACTERISTICSThe l denotes the specifi cations which apply over the full operatingtemperature range, otherwise specifi cations are at TA = 25°C. VIN = 3.3V, VOUT = 5V, unless otherwise noted.PARAMETERCONDITIONSMINTYPMAXUNITSVIN Input Voltage Range l 1.5 5.5 V VIN Quiescent Current SHDN = VCC 10 20 μA VIN Shutdown Current SHDN = GND 0.1 1 μA VOUT Programmable Voltage Range l 2.5 10 V VOUT Quiescent Supply Current SHDN = VCC 2 4 μA VOUT Shutdown Current SHDN = GND 0.1 1 μA Reference Feedback Voltage VIN = 3.3V, VOUT = 7.5V l 1.19 1.22 1.25 V FB Input Leakage Current Measured on FB 10 50 nA Converter Performance Peak Switch Current (VIN = 3.3V) L = 22μH l 60 75 90 mA tOFF Timer (VIN = 3.3V, VOUT = 5V) Varies by 1/(VOUT – VIN) 225 400 550 ns Zero Current Comparator Threshold L = 22μH 0 mA Main NMOS Switch On-Resistance VOUT = 5V 2.8 Ω Leakage Current VSWITCH = 10V, VOUT = 10V 0.01 1 μA Main PMOS Switch On-Resistance VOUT = 5V 4.2 Ω Leakage Current VIN = 5V, VSWITCH = 5V, VOUT = 0V 0.02 2 μA Logic Inputs SHDN Threshold (Rising Edge) 0.3 1 V SHDN Hysteresis 80 mV SHDN Input Leakage Current SHDN = 3.3V 0 50 nA Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 3: This IC includes overtemperature protection that is intended may cause permanent damage to the device. Exposure to any Absolute to protect the device during momentary overload conditions. Junction Maximum Rating condition for extended periods may affect device temperature will exceed 125°C when overtemperature protection is active. reliability and lifetime. Continuous operation above the specifi ed maximum operating junction Note 2: The LTC3459E is guaranteed to meet performance specifi cations temperature may impair device reliability. from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. 3459fc 3
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