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LBRX Datasheet(PDF) 2 Page - Linear Technology |
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LBRX Datasheet(HTML) 2 Page - Linear Technology |
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2 / 20 page  2 LT3466-1 34661f PARAMETER CONDITIONS MIN TYP MAX UNITS Minimum Operating Voltage 2.7 V Maximum Operating Voltage 22 V FB1 Voltage ● 192 200 208 mV FB2 Voltage ● 788 800 812 mV FB1 Pin Bias Current VFB1 = 0.2V (Note 3) 10 50 nA FB2 Pin Bias Current VFB2 = 0.8V (Note 3) 10 50 nA Quiescent Current VFB1 = VFB2 = 1V 5 7.5 mA CTRL1 = CTRL2 = 0V 16 25 µA Switching Frequency RT = 48.7k 0.75 1 1.25 MHz Oscillator Frequency Range (Note 4) 200 2000 kHz Nominal RT Pin Voltage RT = 48.7k 0.54 V Maximum Duty Cycle RT = 48.7k ● 90 96 % RT = 20.5k 92 % RT = 267k 99 % Converter 1 Current Limit ● 310 400 mA Converter 2 Current Limit ● 310 400 mA Converter 1 VCESAT ISW1 = 300mA 320 mV Converter 2 VCESAT ISW2 = 300mA 320 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 Feedback Voltage ● 1V CTRL1 or CTRL2 Voltage to Turn On the IC 150 mV CTRL1 and CTRL2 Voltages to Shut Down Chip 70 mV CTRL1 Pin Bias Current VCTRL1 = 1V ● 6 9 12.5 µA CTRL2 Pin Bias Current VCTRL2 = 1V (Note 3) ● 10 120 nA (Note 1) Input Voltage (VIN) ................................................... 24V SW1, SW2 Voltages ................................................ 44V VOUT1, VOUT2 Voltages ............................................. 44V CTRL1, CTRL2 Voltages ........................................... 24V FB1, FB2 Voltages ...................................................... 2V Operating Temperature Range (Note 2) ... –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 = 3°C/W EXPOSED PAD (PIN 11) IS GND MUST BE SOLDERED TO PCB ORDER PART NUMBER DD PART MARKING LBRX LT3466EDD-1 Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The ● 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. 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 Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ |
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