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ADP1621 Datasheet(PDF) 10 Page - Analog Devices |
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ADP1621 Datasheet(HTML) 10 Page - Analog Devices |
10 / 32 page ADP1621 Rev. A | Page 10 of 32 250 0 –40 160 CS LEAKAGE (nA) VIN = 5V CS = 30V 200 150 100 50 10 60 110 Figure 17. Temperature vs. CS Leakage 8 –16 –50 150 TEMPERATURE (°C) 4 0 –4 –8 –12 0 50 100 VFB = 1.2113V AT 25°C FB BIAS CURRENT IS MEASURED BY FORCING A CONSTANT 1.2113V OVER THE TEMPERATURE RANGE. Figure 18. FB Bias Current vs. Temperature 90 0 1.0 fSYNC/fOSC 2.2 fOSC = 200kHz fOSC = 550kHz 80 70 60 50 40 30 20 10 1.2 1.4 1.6 1.8 2.0 Figure 19. Slope-Compensation Current vs. fSYNC/fOSC 1.6 0 –50 150 TEMPERATURE (°C) 0 50 100 1.4 1.2 1.0 0.8 0.6 0.4 0.2 VIN = 5V SDSN = 0V Figure 20. Shutdown IN Current vs. Temperature 1.2165 1.2120 –50 150 TEMPERATURE (°C) 050 100 VIN = 5V SDSN = 0V 1.2160 1.2155 1.2150 1.2145 1.2140 1.2135 1.2130 1.2125 Figure 21. FB Voltage vs. Temperature CH1 5V CH2 5V CH4 500mAΩ M2µs A CH1 2.9V 1 2 4 TA = 25°C VIN = 3.3V VOUT = 5V LOAD = 0.1A DCM OPERATION CH1 = GATE CH4 = INDUCTOR CURRENT CH2 = DRAIN VOLTAGE Figure 22. DCM Switching Waveform |
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