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MAX1953EUB Datasheet(PDF) 2 Page - Maxim Integrated Products |
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MAX1953EUB Datasheet(HTML) 2 Page - Maxim Integrated Products |
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2 / 22 page  Low-Cost, High-Frequency, Current-Mode PWM Buck Controller 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, FB to GND...........................................................-0.3V to +6V LX to BST..................................................................-6V to +0.3V BST to GND ............................................................-0.3V to +20V DH to LX ....................................................-0.3V to (VBST + 0.3V) DL, COMP to GND.......................................-0.3V to (VIN + 0.3V) HSD, ILIM, REFIN to GND ........................................-0.3V to 14V PGND to GND .......................................................-0.3V to +0.3V IDH, IDL ................................................................±100mA (RMS) Continuous Power Dissipation (TA = +70°C) (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 ELECTRICAL CHARACTERISTICS (VIN = 5V, VBST - VLX = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER CONDITIONS MIN TYP MAX UNITS Operating Input Voltage Range 3.0 5.5 V HSD Voltage Range MAX1954 only (Note 2) 3.0 13.2 V Quiescent Supply Current VFB = 1.5V, no switching 1 2 mA Standby Supply Current (MAX1953/ MAX1957) VIN = VBST = 5.5V, COMP = GND 220 350 µA Standby Supply Current (MAX1954) VIN = VBST = 5.5V, VHSD = 13.2V, COMP = GND 220 350 µA Undervoltage Lockout Trip Level Rising and falling VIN, 3% hysteresis 2.50 2.78 2.95 V Output Voltage Adjust Range (VOUT) 0.8 0.86 x VIN V ERROR AMPLIFIER TA = 0 °C to +85°C (MAX1953/MAX1954) 0.788 0.8 0.812 TA = -40 °C to +85°C (MAX1953/MAX1954) 0.776 0.8 0.812 FB Regulation Voltage MAX1957 only VREFIN - 8mV VREFIN VREFIN + 8mV V Transconductance 70 110 160 µS FB Input Leakage Current VFB = 0.9V 5 500 nA REFIN Input Bias Current VREFIN = 0.8V, MAX1957 only 5 500 nA FB Input Common-Mode Range -0.1 1.5 V REFIN Input Common-Mode Range MAX1957 only -0.1 1.5 V Current-Sense Amplifier Voltage Gain Low ILIM = GND (MAX1953 only) 5.67 6.3 6.93 V/V VILIM = VIN or ILIM = open (MAX1953 only) Current-Sense Amplifier Voltage Gain MAX1954/MAX1957 3.15 3.5 3.85 V/V |
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