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MAX640CSA Datasheet(PDF) 5 Page - Maxim Integrated Products |
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MAX640CSA Datasheet(HTML) 5 Page - Maxim Integrated Products |
5 / 12 page 5V/3.3V/3V/Adjustable, High-Efficiency, Low IQ, Step-Down DC-DC Converters _______________________________________________________________________________________ 5 0 70 MAX639 START-UP TIME vs. OUTPUT CURRENT 2 8 OUTPUT CURRENT (mA) 20 6 12 0 10 40 60 80 100 V+ = 5.5V 10 4 30 50 90 V+ = 9.0V V+ = 11.5V MEASURED FROM THE RISING EDGE OF V+ OR SHDN TO (VOUT = 5V). 0 70 MAX640/MAX653 START-UP TIME vs. OUTPUT CURRENT 2 8 OUTPUT CURRENT (mA) 20 6 0 10 40 60 80 100 10 4 30 50 90 V+ = 9.0V V+ = 11.5V V+ = 5.0V MEASURED FROM THE RISING EDGE OF V+ OR SHDN TO (VOUT = 3.3V)(MAX640) OR (VOUT = 3.0V)(MAX653). THE START-UP TIME DIFFERENCE BETWEEN THE MAX640 AND THE MAX653 IS NEGLIGIBLE. L = 100 µH 0 30 MAX639 START-UP TIME vs. OUTPUT CURRENT 10 30 OUTPUT CURRENT (mA) 0 5 15 25 40 20 10 20 V+ = 9.0V V+ = 11.5V V+ = 5.5V MEASURED FROM THE RISING EDGE OF V+ OR SHDN TO (VOUT = 5.0V) L = 470 µH. 0 30 MAX640/MAX653 START-UP TIME vs. OUTPUT CURRENT 10 30 OUTPUT CURRENT (mA) 0 5 15 25 40 20 10 20 V+ = 9.0V V+ = 11.5V V+ = 5.0V MEASURED FROM THE RISING EDGE OF V+ OR SHDN TO (VOUT = 3.3V)(MAX640) OR (VOUT = 3.0V)(MAX653). THE START-UP TIME DIFFERENCE BETWEEN THE MAX640 AND THE MAX653 IS NEGLIGIBLE. L = 470 µH _____________________________Typical Operating Characteristics (continued) (Circuit of Figure 3, internal feedback, L = 100µH, TA = +25°C, unless otherwise noted.) 0 7 NO-LOAD SUPPLY CURRENT vs. INPUT VOLTAGE 40 60 INPUT VOLTAGE (V) 4 50 70 0 1 2 3 5 6 11 12 MAX639, VOUT = 5V 10 30 20 9 8 10 MAX653, VOUT = 3V |
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