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LT1933IDCB-PBF Datasheet(PDF) 5 Page - Linear Technology |
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LT1933IDCB-PBF Datasheet(HTML) 5 Page - Linear Technology |
5 / 20 page LT1933 5 1933fd TYPICAL PERFORMANCE CHARACTERISTICS Frequency Foldback Soft-Start SHDN Pin Current Typical Minimum Input Voltage Typical Minimum Input Voltage Switch Current Limit Operating Waveforms Operating Waveforms, Discontinuous Mode FB PIN VOLTAGE (V) 0.0 700 600 300 100 400 500 200 0 0.5 1933 G10 1.0 1.5 TA = 25°C SHDN PIN VOLTAGE (V) 0 1.4 1.2 0.6 0.2 0.8 1.0 0.4 0 1 1933 G11 234 TA = 25°C DC = 30% 0 200 150 50 100 0 4 1933 G12 812 16 SHDN PIN VOLTAGE (V) TA = 25°C LOAD CURRENT (mA) 5 6 7 8 1933 G13 4 VOUT = 5V TA = 25°C L = 33μH TO START TO RUN 1 10 100 LOAD CURRENT (mA) 4.5 5.0 5.5 6.0 1933 G14 3.0 3.5 4.0 VOUT = 3.3V TA = 25°C L = 22μH TO START TO RUN 1 10 100 TEMPERATURE (°C) –50 1.4 1.2 1.0 0.6 0 0.2 0.8 0.4 –25 0 25 1933 G15 50 75 100 150 125 VIN = 12V, VOUT = 3.3V, IOUT = 400mA, L = 22μH, COUT = 22μF 1933 G16 VOUT 10mV/DIV IL 200mA/DIV VOUT1 1.8V VOUT2 1.2V VSW 10V/DIV VIN = 12V, VOUT = 3.3V, IOUT = 20mA, L = 22μH, COUT = 22μF 1933 G17 VOUT 10mV/DIV IL 200mA/DIV VOUT1 1.8V VOUT2 1.2V VSW 10V/DIV |
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