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LT3466EDD Datasheet(PDF) 2 Page - Linear Technology |
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LT3466EDD Datasheet(HTML) 2 Page - Linear Technology |
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2 / 20 page  2 LT3466 3466f (Note 1) Input Voltage (VIN) ................................................... 24V SW1, SW2 Voltages ................................................ 44V VOUT1, VOUT2 Voltages ............................................. 44V CTRL1, CTRL2 Voltages ........................................... 24V FB1, FB2, RT Voltages ................................................ 2V Operating Temperature Range ................ –40 °C to 85°C Storage Temperature Range .................. –65 °C to 125°C Junction Temperature .......................................... 125 °C ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO TJMAX = 125°C, θJA = 43°C/W, θJC = 2.96°C/W EXPOSED PAD (PIN 11) IS GND MUST BE SOLDERED TO PCB ORDER PART NUMBER DD PART MARKING LBBH LT3466EDD Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The q denotes specifications that apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 3V, VCTRL1 = 3V, VCTRL2 = 3V, unless otherwise specified. PARAMETER CONDITIONS MIN TYP MAX UNITS Minimum Operating Voltage 2.7 V Maximum Operating Voltage 24 V FB1 Voltage q 192 200 208 mV FB2 Voltage q 192 200 208 mV FB1 Pin Bias Current VFB1 = 0.2V (Note 3) 10 50 nA FB2 Pin Bias Current VFB2 = 0.2V (Note 3) 10 50 nA Quiescent Current VFB1 = VFB2 = 0.3V 5 6 mA CTRL1 = CTRL2 = 0V 16 25 µA Switching Frequency RT = 48.7k 0.8 1 1.2 MHz Oscillator Frequency Range 200 2000 kHz Nominal RT Pin Voltage RT = 48.7k 0.54 V Maximum Duty Cycle RT = 48.7k q 90 96 % RT = 20.5k 92 % RT = 267k 99 % Converter 1 Current Limit q 320 400 mA Converter 2 Current Limit q 320 400 mA Converter 1 VCESAT ISW1 = 300mA 360 mV Converter 2 VCESAT ISW2 = 300mA 360 mV Switch 1 Leakage Current VSW1 = 10V 0.01 5 µA Switch 2 Leakage Current VSW2 = 10V 0.01 5 µA CTRL1 Voltage for Full LED Current 1.8 V CTRL2 Voltage for Full LED Current 1.8 V CTRL1 and CTRL2 Voltage to Shut Down Chip 50 mV CTRL1, CTRL2 Pin Bias Current VCTRL1 = VCTRL2 = 1V q 810 12 µA VOUT1 Overvoltage Threshold 42 V VOUT2 Overvoltage Threshold 42 V TOP VIEW 11 DD PACKAGE 10-LEAD (3mm × 3mm) PLASTIC DFN 10 9 6 7 8 4 5 3 2 1 FB1 CTRL1 RT CTRL2 FB2 VOUT1 SW1 VIN SW2 VOUT2 |
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