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MAX1549ETL Datasheet(PDF) 2 Page - Maxim Integrated Products |
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MAX1549ETL Datasheet(HTML) 2 Page - Maxim Integrated Products |
2 / 35 page Dual, Interleaved, Fixed-Frequency Step-Down Controller with a Dynamically Adjustable Output 2 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS (Circuit of Figure 1, VCC = VDD = 5V, SKIP = GND, TA = 0°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. VCC to GND ..............................................................-0.3V to +6V VDD to PGND............................................................-0.3V to +6V CSH_, CSL_, OUT_, PGOOD_, OD_ to GND ...........................................-0.3V to (VCC + 0.3V) G0, G1, ILIM_, REFIN to GND ..................................-0.3V to +6V FB2, SKIP, ON_ to GND ...........................................-0.3V to +6V REF, CC1, FBLANK, FSEL to GND.............-0.3V to (VCC + 0.3V) DL1, DL2 to PGND .....................................-0.3V to (VDD + 0.3V) BST1, BST2 to PGND .............................................-0.3V to +36V LX1 to BST1..............................................................-6V to +0.3V DH1 to LX1 ..............................................-0.3V to (VBST1 + 0.3V) LX2 to BST2..............................................................-6V to +0.3V DH2 to LX2 ..............................................-0.3V to (VBST2 + 0.3V) GND to PGND .......................................................-0.3V to +0.3V REF Short Circuit to GND ...........................................Continuous Continuous Power Dissipation (TA = +70 °C) 40-Pin 6mm x 6mm Thin QFN (derated 26.3mW/ °C above +70 °C).............................................................2105mW 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 INPUT SUPPLIES (Note 1) Input Voltage Range VBIAS VCC, VDD 4.5 5.5 V Quiescent Supply Current (VCC) ICC OUT1 and FB2 forced above their regulation points 1.0 1.8 mA Quiescent Supply Current (VDD) IDD OUT1 and FB2 forced above their regulation points 1.5 5 µA Shutdown Supply Current (VCC) ON1 = ON2 = GND, SKIP = VCC 2.5 5 µA Shutdown Supply Current (VDD) ON1 = ON2 = GND <1 5 µA PWM CONTROLLERS 50% duty cycle -5 0 +5 Main Output-Voltage Accuracy (OUT1 Tracking) VREFIN - VOUT1 With respect to REFIN, SKIP = VCC or GND 10% to 90% duty cycle -10 +10 mV FB2 = GND 2.475 2.5 2.525 Secondary Preset Output-Voltage Accuracy (OUT2 Fixed) VOUT2 SKIP = VCC, 50% duty cycle (Note 1) FB2 = VCC 1.780 1.8 1.820 V 50% duty cycle 0.490 0.50 0.510 Secondary Feedback-Voltage Accuracy (FB2 Adjustable) VFB2 SKIP = VCC (Note 1) 10% to 90% duty cycle 0.485 0.515 V Load-Regulation Error ILOAD = 0 to 3A, SKIP = VCC 0.1 % VIN Line-Regulation Error VIN = 2V to 28V 1 % OUT1 (tracks REFIN) 0.5 2.0 Output Adjust Range OUT2 0.5 2.7 V OUT1 Input Bias Current IOUT1 VOUT1 = 0.5V to 2.0V -1 +1 µA FB2 Input Bias Current IFB2 VFB2 = 0 to 2.7V -0.1 +0.1 µA FB2 = GND or adjustable 120 250 460 OUT2 Input Resistance ROUT2 FB2 = VCC 85 180 335 k Ω |
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