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MAX8640YEXT13+T Datasheet(PDF) 2 Page - Maxim Integrated Products |
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MAX8640YEXT13+T Datasheet(HTML) 2 Page - Maxim Integrated Products |
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2 / 11 page  Tiny 500mA, 4MHz/2MHz Synchronous Step-Down DC-DC Converters 2 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS 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. IN to GND .................................................................-0.3V to +6V LX, OUT, SHDN to GND ..............................-0.3V to (VIN + 0.3V) LX Current (Note 1) ........................................................0.8ARMS OUTPUT Short Circuit to GND ...................................Continuous Continuous Power Dissipation (TA = +70°C) 6-Pin SC70 (derate 3.1mW/°C above +70°C) ..............245mW 6-Pin µDFN (derate 2.1mW/°C above +70°C) ..............167.7mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C ELECTRICAL CHARACTERISTICS (VIN = 3.6V, SHDN = IN, TA = -40°C to +85°C, typical values are at TA = +25°C, unless otherwise noted.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Range VIN 2.7 5.5 V UVLO Threshold UVLO VIN rising, 100mV hysteresis 2.44 2.6 2.70 V No load, no switching 28 48 TA = +25°C 0.01 0.1 Supply Current ICC SHDN = GND TA = +85°C 0.1 µA Output Voltage Range VOUT Factory preset 0.8 2.5 V ILOAD = 0mA, TA = +25°C -1 0 +1 Output Voltage Accuracy (Falling Edge) ILOAD = 0mA, TA = -40°C to +85°C -2 +2 % Output Load Regulation (Voltage Positioning) Equal to inductor DC resistance RL V/A VIH VIN = 2.7V to 5.5V 1.4 SHDN Logic Input Level VIL VIN = 2.7V to 5.5V 0.4 V TA = +25°C 0.001 1 SHDN Logic Input Bias Current IIH,IL VIN = 5.5V, SHDN = GND or IN TA = +85°C 0.01 µA Peak Current Limit ILIMP pFET switch 590 770 1400 mA Valley Current Limit ILIMN nFET rectifier 450 650 1300 mA Rectifier Off-Current Threshold ILXOFF nFET rectifier 10 40 70 mA RONP pFET switch, ILX = -40mA 0.6 1.2 On-Resistance RONN nFET rectifier, ILX = 40mA 0.35 0.7 Ω TA = +25°C 0.1 1 LX Leakage Current ILXLKG VIN = 5.5V, LX = GND to IN, SHDN = GND TA = +85°C 1 µA tON(MIN) 95 Minimum On and Off Times tOFF(MIN) 95 ns Thermal Shutdown +160 °C Thermal-Shutdown Hysteresis 20 °C Note 1: LX has internal clamp diodes to IN and GND. Applications that forward bias these diodes should not exceed the IC’s package power-dissipation limit. Note 2: All devices are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design. |
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