LT3595 ELECTRICAL CHARACTERISTICSThe ● denotes the specifi cations which apply over the full operatingtemperature range, otherwise specifi cations are at TA = 25°C, VIN = 45V, VCC = 3.3V, PWM = ⎯ S ⎯ H ⎯ D ⎯ N = ⎯ O ⎯ P ⎯ E ⎯ N ⎯ L ⎯ E ⎯ D = 3.3V, RSET = 75k Ω ,GND = 0V, unless otherwise noted.PARAMETERCONDITIONSMINTYPMAXUNITS VIN Operating Voltage 4.5 V VCC Operating Voltage 3 5.5 V VCC Input Under Voltage Lockout 2.6 2.9 V IVIN Quiescent Current ON, No Switching VIN = 45V 0.25 mA IVIN Quiescent Current in Shutdown VIN = 45V, ⎯S⎯H⎯D⎯N = 0V 15 40 μA IVCC Quiescent Current ON, No Switching VCC = 3.3V 17 mA IVCC Quiescent Current in Shutdown VCC = 3.3V, ⎯S⎯H⎯D⎯N = 0V 3 10 μA IL1-16 Output Current Accuracy RSET = 75.0kΩ 18.4 20 21.6 mA Switching Frequency 1.6 2 2.4 MHz Maximum Duty Cycle ● 78 83 % Switch Current Limit ● 90 120 150 mA Switch VCESAT ISW1-16 = 50mA 450 mV Switch Leakage Current VSW1-16 = 45V 0.1 6 μA Schottky Forward Drop ISCHOTTKY = 50mA 0.8 V Schottky Leakage Current VIN = 45V, VSW1-16 = 0.7V, ⎯S⎯H⎯D⎯N = 0V 0.1 4 μA ⎯S⎯H⎯D⎯N, PWM1-16 Input Low Voltage 0.4 V ⎯S⎯H⎯D⎯N, PWM1-16 Input High Voltage 1.6 V ⎯S⎯H⎯D⎯N Pin Bias Current ⎯S⎯H⎯D⎯N = 3.3V 35 μA PWM1-16 Pin Bias Current PWM1-16 = 3.3V 0.1 1 μA ⎯O⎯P⎯E⎯N⎯L⎯E⎯D Pin Voltage VCC = 3.3V, I⎯O⎯P⎯E⎯N⎯L⎯E⎯D = 200μA 0.12 V ⎯O⎯P⎯E⎯N⎯L⎯E⎯D Pin Input Leakage Current ⎯O⎯P⎯E⎯N⎯L⎯E⎯D = 3.3V 0.1 1 μA Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 2: The LT3595 is guaranteed to meet performance specifi cations may cause permanent damage to the device. Exposure to any Absolute from 0°C to 85°C junction temperature. Specifi cations over the –40°C Maximum Rating condition for extended periods may affect device to 85°C operating junction temperature range are assured by design, reliability and lifetime. characterization and correlation with statistical process controls. 3595f 3
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