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MAX640ESA Datasheet(PDF) 2 Page - Maxim Integrated Products |
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MAX640ESA Datasheet(HTML) 2 Page - Maxim Integrated Products |
2 / 12 page 5V/3.3V/3V/Adjustable, High-Efficiency, Low IQ, Step-Down DC-DC Converters 2 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS (V+ = 9V for the MAX639, V+ = 5V for the MAX640/MAX653, ILOAD = 0mA, TA = TMIN to TMAX, typical values are at TA = +25°C, unless otherwise noted.) Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. PARAMETER MIN TYP MAX UNITS 91 Dropout Voltage 0.5 V Output Voltage (Note 2) 2.88 3.00 3.12 V 3.17 3.30 3.43 94 87 91 85 Supply Current Supply Voltage 4.0 11.5 V 10 20 µA 4.80 5.00 5.20 Efficiency 89 % CONDITIONS MAX653 IOUT = 100mA, L = 100µH MAX653, V+ = 4.0V to 11.5V, 0mA < IOUT < 100mA MAX640, V+ = 4.0V to 11.5V, 0mA < IOUT < 100mA MAX639 MAX640 SHDN = V+, no load MAX639, V+ = 6.0V to 11.5V, 0mA < IOUT < 100mA V+...........................................................................................12V LX .........................................................(V+ - 12V) to (V+ + 0.3V) LBI, LBO, VFB, SHDN, VOUT........................-0.3V to (V+ + 0.3V) LX Output Current (Note 1) ......................................................1A LBO Output Current ............................................................10mA Continuous Power Dissipation (TA = +70°C) Plastic DIP (derate 9.09mW/°C above +70°C) .............727mW SO (derate 5.88mW/°C above +70°C) ..........................471mW CERDIP (derate 8.00mW/°C above +70°C) ..................640mW Operating Temperature Ranges: MAX639C_ _ .......................................................0°C to +70°C MAX639E_ _ ....................................................-40°C to +85°C MAX639MJA ..................................................-55°C to +125°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10sec) .............................+300°C IOUT = 100mA, L = 100µH IOUT = 25mA, L = 470µH IOUT = 100mA, L = 100µH IOUT = 25mA, L = 470µH IOUT = 100mA, L = 100µH IOUT = 25mA, L = 470µH Switch On-Time V+ = 9V, VOUT = 5V V+ = 6V, VOUT = 3V 42.5 50.0 57.5 V+ = 9V, VOUT = 3.3V V+ = 4V, VOUT = 3.3V µs 10.6 12.5 14.4 V+ = 9V, VOUT = 3V V+ = 4V, VOUT = 3V 14.2 16.7 19.2 7.5 8.8 10.1 60.7 71.4 82.1 7.1 8.3 9.5 MAX653 MAX639 MAX640 Switch Off-Time V+ = 9V, VOUT = 5V V+ = 6V, VOUT = 3V 14.6 17.2 19.8 V+ = 9V, VOUT = 3.3V V+ = 4V, VOUT = 3.3V µs 9.0 11.7 13.5 V+ = 9V, VOUT = 3V V+ = 4V, VOUT = 3V 16.6 19.5 22.4 13.3 15.6 17.9 13.3 15.6 17.9 14.6 17.2 19.8 MAX653 MAX639 MAX640 Note 1: Peak inductor current must be limited to 600mA by using an inductor of 100µH or greater. |
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