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MAX856ESA Datasheet(PDF) 2 Page - Maxim Integrated Products |
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MAX856ESA Datasheet(HTML) 2 Page - Maxim Integrated Products |
2 / 12 page 3.3V/5V or Adjustable-Output, Step-Up DC-DC Converters 2 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS (Circuits of Figure 2, VIN = 2.5V, ILOAD = 0mA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) 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. Supply Voltage (OUT to GND) ...................................-0.3V, +7V Switch Voltage (LX to GND) .......................................-0.3V, +7V S — H — D — N – , LBO to GND ....................................................-0.3V, +7V LBI, REF, 3/ – 5 – , FB to GND .........................-0.3V, (VOUT + 0.3V) Reference Current (IREF) ..................................................2.5mA Continuous Power Dissipation (TA = +70°C) SO (derate 5.88mW/°C above +70°C) .........................471mW µMAX (derate 4.1mW/°C above +70°C) ......................330mW CERDIP (derate 8.00mW/°C above +70°C) .................640mW Reverse Battery Current (TA ≤ +45°C, Note 1) .................750mA Operating Temperature Ranges MAX85_C_ _ ......................................................0°C to +70°C MAX85_E_ _ ....................................................-40°C to +85°C MAX85_MJA .................................................-55°C to +125°C Junction Temperature .....................................................+150°C Storage Temperature Range ............................-65°C to +160°C Lead Temperature (soldering, 10sec) ............................+300°C Note 1: Reverse battery current is measured from the Typical Operating Circuit’s battery input terminal to GND when the battery is connected backwards. A reverse current of 750mA will not exceed the SO or CERDIP package dissipation limits but, if left for an extended time (more than ten minutes), may degrade performance. LBO = 5V ISINK = 2mA With falling edge 3/ – 5 – = 3V, -20µA ≤ REF load ≤ 250µA, CREF = 0.22µF No REF load MAX858/MAX859 ILOAD = 0mA, 3/ – 5 – = 3V, LBI = 1.5V, VOUT = 3.47V, (FB = 1.5V, MAX857/MAX859 only) MAX856/MAX857 S — H — D — N – = 0V, 3/ – 5 – = 3V, LBI = 1.5V, VOUT = 3.47V, (FB = 1.5V, MAX857/MAX859 only) 2V ≤ VIN ≤ 3V ILOAD = 0mA Output set for 3.3V, measured at VIN in Figure 2, R3 omitted. CONDITIONS µA 1 LBO Output Leakage Current V 0.4 LBO Output Voltage Low mV 25 LBI Input Hysteresis V 1.22 1.25 1.28 LBI Input Threshold % 0.8 2.0 Reference-Voltage Regulation V 1.23 1.25 1.27 Reference Voltage mA 125 500 µA 15 Shutdown Quiescent Current (Note 2) 1 µA 60 No Load Battery Current 4.80 5.0 5.20 3.17 3.3 3.43 4.80 5.0 5.20 µA 25 60 Quiescent Supply Current in 3.3V Mode (Note 2) V 0.8 Minimum Operating Voltage 4.80 5.0 5.20 3.17 3.3 3.43 V 4.80 5.0 5.20 Output Voltage V 0.8 1.8 Minimum Start-Up Supply Voltage UNITS MIN TYP MAX PARAMETER Peak Inductor Current Limit MAX856, 3/ – 5 – = 0V, 0mA ≤ ILOAD ≤ 100mA MAX856, 3/ – 5 – = 3V, 0mA ≤ ILOAD ≤ 150mA MAX857, VOUT = 5V, 0mA ≤ ILOAD ≤100mA MAX858, 3/ – 5 – = 0V, 0mA ≤ ILOAD ≤ 25mA MAX858, 3/ – 5 – = 3V, 0mA ≤ ILOAD ≤ 35mA MAX859, VOUT = 5V, 0mA ≤ ILOAD ≤ 25mA MAX85_C MAX85_E/M |
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