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LT3599EUHPBF Datasheet(PDF) 3 Page - Linear Technology |
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LT3599EUHPBF Datasheet(HTML) 3 Page - Linear Technology |
3 / 26 page LT3599 3599fd elecTrical characTerisTics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, VSHDN = 5V, unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS Minimum Operating Voltage l 2.7 3.1 V Maximum Operating Voltage l 30 V Reference Voltage VREF I(VREF ) = 0µA l 1.21 1.20 1.227 1.24 1.25 V V Reference Voltage Line Regulation I(VREF ) = 0µA, 3.1V < VIN < 30V 0.01 0.03 %/V Maximum VREF Pin Current (Note 3) 100 µA VREF Load Regulation 0 < I(VREF) ≤ 100µA (Max) 1 mV Feedback Voltage l 1.196 1.223 1.250 V FB Pin Bias Current (Note 3) 100 250 nA FB Error Amp Transconductance ∆I = 5µA 200 µmhos FB Error Amp Voltage Gain 210 V/V Current Loop Amp Transconductance 50 µmhos Current Loop Amp Voltage Gain 50 V/V VC Source Current (Out of Pin) LED1-4 = 0.4V, FB = 1V, VC = 1.5V 8 µA VC Sink Current (OVP Mode) LED1-4 = 0.4V, FB = 1.5V, VC = 1.5V 15 µA Quiescent Current VSHDN = 5V, PWM = 0V, Not Switching, VC = 0.7V 3 4.8 mA Quiescent Current in Shutdown VSHDN = 0V 0 1 µA LED Current RISET = 13.3k 96 99 102 mA LED String Current Matching 100mA LED Current l ±0.25 ±1.5 % LED Open Detection Threshold (VLED–GND) FB > 1.25V 0.3 0.4 V LED Short Detection Threshold (VOUT–VLED) 0.8 1.5 2.2 V LED Regulation Voltage 0.77 V LED1-4 Leakage Current VLED1-4 = 45V 0.1 1 µA CTRL Pin Bias Current VCTRL = 0.8V (Note 3) 100 200 nA Switching Frequency RT = 324k RT = 53.6k RT = 20k 176 0.9 1.82 198 1 2.06 220 1.1 2.3 kHz MHz MHz TSET Voltage 595 mV Maximum Switch Duty Cycle RT = 324k RT = 53.6k RT = 20k l 97 85 70 98 90 80 % % % Switch Current Limit (Note 4) 2 2.5 3 A Switch VCESAT ISW = 0.5A 0.10 V Switch Leakage Current VSW = 45V, FB = 1.3V 0.2 5 µA SHDN/UVLO Pin Threshold (VSD_SHDN) Shutdown 0.3 0.7 0.95 V SHDN/UVLO Pin Threshold (VSD_ UVLO) Rising 1.28 1.36 1.44 V SHDN/UVLO Pin Hysteresis Current SHDN = VSD_UVLO – 50mV SHDN = VSD_UVLO + 50mV 2.5 4 0 5.5 µA µA Soft-Start Current SS = 1V (Note 3) 11 µA PWM Input High Threshold 1 V PWM Input Low Threshold 0.4 V |
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