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LTM8055 Datasheet(PDF) 3 Page - Linear Technology |
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LTM8055 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 26 page  LTM8005 3 8005f For more information www.linear.com/LTM8005 ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS MIN TYP MAX UNITS Minimum Input Voltage l 5 V LED DC Current CTRL1=1.5V CTRL1=0.6V CTRL1=0.2V 1.65 0.8 0.16 A A A SW Current Limit 10 12 14 A SW RDS(ON) 19 m ISMON Voltage ILED =1.5A 0.88 0.96 V Quiescent Current into VIN EN/UVLO=0V (Disabled), PWM=0V EN/UVLO=1.15V, PWM=0V RT =82.5K to GND, FB=1.5V (Not Switching) 35 40 3.5 µA µA mA VREF Voltage IREF =–100µA l 1.95 2.00 2.08 V VREF Line Regulation 5V < VIN < 48V 0.1 % VREF Load Regulation –100µA < IREF < 0µA 1 % SS Current Sourcing, SS=0V Sinking, ILED Overcurrent 28 2.8 µA µA ILED Overcurrent Threshold 2.4 A ISN-LED RDS(ON) 53 m VC Output Impedance 2000 k VC Standby Input Bias Current PWM=0V –20 20 nA VC Pin Current VC=1.2V, Sourcing VC=1.2V, Sinking 10 30 µA µA Voltage at FB pin l 1.23 1.25 1.27 V FB Amplifier gm 500 µS FB Pin Input Bias Current Current Out of Pin, FB=VFB 200 nA FB OPENLED Threshold OPENLED Falling 1.176 1.222 V FB Overvoltage Threshold 1.26 1.34 V FB SHORTLED Threshold SHORTLED Falling 300 350 mV LED Current C/10 Threshold 0.16 A Input Current Limit Threshold IVINP–IVINN 53 67 mV IVINCOMP Voltage IVINP–IVINN=60mV 1.2 V Switching Frequency RT =82.5k RT =26.1k RT =6.65k 85 240 800 105 300 1000 125 360 1200 kHz kHz kHz Switching Frequency Modulation RAMP=2V 70 % RAMP Input Low Threshold 1 V RAMP Input High Threshold 2 V RAMP Pin Source Current RAMP=0.4V 12 µA RAMP Pin Sink Current RAMP=1.6V 12 µA CTRL1, CTRL2 Pin Current CTRL1, CTRL2=1V 200 nA PWM Input Threshold Rising 1 V PWM Pin Bias Current 10 µA The l denotes the specifications which apply over the specified operating temperature range, otherwise specifications are at TA = 25°C. CTRL1 = CTRL2 = PWM = 5V, unless otherwise noted (Note 2). |
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