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MAX857ESA Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX857ESA Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 12 page 3.3V/5V or Adjustable-Output, Step-Up DC-DC Converters _______________________________________________________________________________________ 3 100 20 10 0 0.01 0.001 0.1 10 1 100 1000 MAX858/MAX859 EFFICIENCY vs. OUTPUT CURRENT VOUT = 3.3V 40 30 50 LOAD CURRENT (mA) 60 70 80 90 VIN = 2.0V VIN = 2.5V VIN = 1.5V 100 20 10 0 0.01 0.001 0.1 10 1 100 1000 MAX858/MAX859 EFFICIENCY vs. OUTPUT CURRENT VOUT = 5V 40 30 50 LOAD CURRENT (mA) 60 70 80 90 VIN = 2.5V VIN = 3.3V VIN = 1.5V 100 20 10 0 0.01 0.001 0.1 10 1 100 1000 MAX856/MAX857 EFFICIENCY vs. OUTPUT CURRENT VOUT = 5V 40 30 50 LOAD CURRENT (mA) 60 70 80 90 VIN = 2.0V VIN = 3.3V VIN = 1.5V 100 20 10 0 0.01 0.001 0.1 10 1 100 1000 MAX856/MAX857 EFFICIENCY vs. OUTPUT CURRENT VOUT = 3.3V 40 30 50 LOAD CURRENT (mA) 60 70 80 90 VIN = 2.0V VIN = 2.5V VIN = 1.5V __________________________________________Typical Operating Characteristics (Circuits of Figure 2, TA = +25°C, unless otherwise noted.) ELECTRICAL CHARACTERISTICS (continued) (Circuits of Figure 2, VIN = 2.5V, ILOAD = 0mA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) Note 2: Supply current from the 3.3V output is measured with an ammeter between the 3.3V output and OUT pin. This current correlates directly with actual battery supply current, but is reduced in value according to the step-up ratio and efficiency. VOUT = 3.47V to keep the internal switch open when measuring the current into the device. Note 3: Minimum value is production tested. Maximum value is guaranteed by design and is not production tested. – S — H — D — N – , 3/ – 5 – Input Voltage Low 0.4 V S — H — D — N – , 3/ – 5 – Input Voltage High 1.6 V S — H — D — N – , 3/ – 5 – , FB, LBI Input Current LBI = 1.5V, FB = 1.5V, – S — H — D — N – = 0V or 3V, 3/ – 5 – = 0V or 3V ±100 nA FB Voltage MAX857/MAX859 1.22 1.25 1.28 V Output Voltage Range MAX857/MAX859, ILOAD = 0mA (Note 3) 2.7 6.0 V |
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