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MAX8745 Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX8745 Datasheet(HTML) 3 Page - Maxim Integrated Products |
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3 / 36 page  High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers _______________________________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 1, VIN = 12V, both SMPS enabled, FSEL = REF, SKIP = GND, ILIM = LDO5, FBA = LDO5, IREF = ILDO5 = IOUTA = no load, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Output Voltage Adjust Range Either SMPS 2.0 5.5 V FB3, FB5 Dual Mode Threshold 3.0 VLOO5 - 1.0 VLOO5 - 0.4 V Feedback Input Leakage Current VFB3 = VFB5 = 2.1V -0.1 +0.1 µA DC Load Regulation Either SMPS, SKIP = LDO5, 0 < VCSH_ - VCSL_ < 50mV -0.1 % Line Regulation Error Either SMPS, 6V < VIN < 26V 0.03 %/V FSEL = GND 170 200 230 FSEL = REF 270 300 330 Operating Frequency (Note 1) fOSC FSEL = LDO5 425 500 575 kHz Maximum Duty Factor DMAX (Note 1) 97.5 99 % Minimum On-Time tONMIN 100 ns 40 % SMPS3-to-SMPS5 Phase Shift SMPS5 starts after SMPS3 144 Deg CURRENT LIMIT ILIM Adjustment Range 0.5 VREF V Current-Sense Input Leakage Current CSH3 = CSH5 = GND or LDO5 -1 +1 µA Current-Limit Threshold (Fixed) VLIMIT VCSH_ - VCSL _, ILIM = LDO5 45 50 55 mV VILIM = 2.00V 185 200 215 Current-Limit Threshold (Adjustable) VLIMIT VCSH_ - VCSL _ VILIM = 1.00V 94 100 106 mV VCSH_ - VCSL _, SKIP = ILIM = LDO5 -67 -60 -53 mV Current-Limit Threshold (Negative) VNEG VCSH_ - VCSL _, SKIP = LDO5, adjustable mode, percent of current limit -120 % Current-Limit Threshold (Zero Crossing) VZX VCSH_ - VCSL _, SKIP = GND, ILIM = LDO5 03 6 mV ILIM = LDO5 6 10 14 mV Idle Mode™ Threshold VIDLE VCSH_ - VCSL _, SKIP = GND With respect to current-limit threshold (VLIMIT) 20 % ILIM = LDO5 2.5 5 7.5 mV Idle Mode Threshold (Low Audible-Noise Mode) VIDLE VCSH_ - VCSL _, SKIP = REF With respect to current-limit threshold (VLIMIT) 10 % ILIM Leakage Current ILIM = GND or REF -1 +1 µA Idle Mode is a trademark of Maxim Integrated Products, Inc. |
Similar Part No. - MAX8745 |
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Similar Description - MAX8745 |
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