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MAX8775 Datasheet(PDF) 8 Page - Maxim Integrated Products |
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MAX8775 Datasheet(HTML) 8 Page - Maxim Integrated Products |
8 / 30 page Dual and Combinable Graphics Core Controller for Notebook Computers 8 _______________________________________________________________________________________ Typical Operating Characteristics (continued) (Circuit of Figure 1, VIN = 12V, VDD = VCC = 5V, SKIP_ = GND, TA = +25°C, unless otherwise noted.) STARTUP WAVEFORMS MAX8775 toc10 0 0 5A 200 μs/div 0 0 A B D C E 0 D: PGOOD1, 5V/div E: ILX1, 5A/div A: ON1, 5V/div B: DL1, 5V/div C: VOUT1, 1V/div SKIP1 = GND, RLOAD1 = 1 Ω, VIN = 12V SHUTDOWN WAVEFORMS MAX8775 toc11 0 1.5V 0 5A 0 0 A B D C E 0 D: PGOOD1, 5V/div E: ILX1, 5A/div A: ON1, 5V/div B: DL1, 5V/div C: VOUT1, 1V/div SKIP1 = GND, RLOAD1 = 1 Ω, VIN = 12V 200 μs/div STARTUP/SHUTDOWN— SAME SLEW RATE 0 0 5V 5V 0 0 A B D C E 0 D: PGOOD1, 5V/div E: PGOOD2, 5V/div A: ON1, ON2, 5V/div B: VOUT1, 1V/div C: VOUT2, 1V/div CSLEW1 = CSLEW2 = 470pF RLOAD1 = RLOAD2 = 1 Ω 400 μs/div MAX8775 toc12 STARTUP/SHUTDOWN— SAME START TIME MAX8775 toc13 0 0 5V 5V 0 400 μs/div 0 A B D C E 0 D: PGOOD1, 5V/div E: PGOOD2, 5V/div A: ON1, ON2, 5V/div B: VOUT1, 1V/div C: VOUT2, 1V/div CSLEW1 = 470pF, CSLEW2 = 600pF RLOAD1 = RLOAD2 = 1 Ω LOAD TRANSIENT (SEPARATE MODE) MAX8775 toc14 0 10A 5V 0 20 μs/div 1.2V 12V A B D C 0 C: LX1, 10V/div D: ILX1, 10A/div A: VOUT1, 100mV/div B: DL1, 5V/div VIN = 12V, VOUT1 = 1.2V SKIP1 = GND IOUT1 = 1A TO 11A TO 1A LOAD TRANSIENT (COMBINED MODE) MAX8775 toc15 0 10A 0 1.5V 12V 12V A B D C 0 C: LX1, 10V/div D: LX2, 10V/div A: VOUT1, 100mV/div B: ILX1, 10A/div VIN = 12V, VOUT = 1.5V IOUT1 = 5A TO 25A TO 5A 20 μs/div |
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