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MAX8545EUB+ Datasheet(PDF) 2 Page - Maxim Integrated Products |
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MAX8545EUB+ Datasheet(HTML) 2 Page - Maxim Integrated Products |
2 / 18 page Low-Cost, Wide Input Range, Step-Down Controllers with Foldback Current Limit 2 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS (VIN = VL = VCC = 5V, TA = -40°C to +85°C, 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. (All voltages referenced to GND unless otherwise noted.) VIN to GND ............................................................-0.3V to +30V VCC to GND .............................-0.3V, lower of 6V or (VL + 0.3V) FB to GND ................................................................-0.3V to +6V BST to GND ............................................................-0.3V to +36V VL, DL, COMP to GND ..............................-0.3V to (VCC + 0.3V) BST to LX..................................................................-0.3V to +6V DH to LX ....................................................-0.3V to (VBST + 0.3V) VL Short to GND ......................................................................5s LX to GND ................................................................-1V to +30V Input Current (any pin) .....................................................±50mA Continuous Power Dissipation (TA = +70°C) 10-Pin µMAX (derate 5.6mW/°C above +70°C) ..........444mW 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 PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS VCC = VL, VIN separate from VCC 4.9 28.0 VIN Operating Range VIN VIN = VL = VCC 2.7 5.5 V VIN Undervoltage Lockout (UVLO) Trip Level Rising and falling edge, hysteresis = 2% 2.35 2.50 2.66 V VIN Operating Supply Current VFB = 0.88V (no switching) 0.7 1.2 mA VL Output Voltage 5.5V < VIN < 28V, VCC = VL, 1mA < ILOAD < 25mA 4.7 5 5.3 V Thermal Shutdown Rising temperature, typical hysteresis = 10 °C (Note 1) +160 °C OSCILLATOR MAX8545, MAX8546 250 300 360 Frequency fOSC MAX8548 80 100 120 kHz DH output, MAX8545, MAX8546 5 Minimum Duty Cycle DCMIN MAX8548 10 % DH output, MAX8545, MAX8546 83 86 Maximum Duty Cycle DCMAX MAX8548 90 95 % SOFT-START MAX8545, MAX8546 6.6 Digital Ramp Period MAX8548 10.2 ms MAX8545, MAX8546 VOUT / 64 Soft-Start Levels MAX8548 VOUT / 32 V |
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