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MAX8745ETJ+ Datasheet(PDF) 11 Page - Maxim Integrated Products |
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MAX8745ETJ+ Datasheet(HTML) 11 Page - Maxim Integrated Products |
11 / 36 page High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers ______________________________________________________________________________________ 11 Typical Operating Characteristics (continued) (Circuit of Figure 1, VIN = 12V, SKIP = GND, FSEL = REF, TA = +25°C, unless otherwise noted.) SOFT-START WAVEFORM MAX8744 toc16 B A 400 μs/div C D E 3.3V 0 5V 0 0 0 12V 5A 0 A. ON3 AND ON5, 5V/div B. 5V OUTPUT (VOUT5), 5V/div C. PGOOD5, 5V/div D. AUX LDO OUTPUT (VOUTA), 10V/div E. L5 INDUCTOR CURRENT, 5A/div SMPS DELAYED STARTUP SEQUENCE (ON3 = REF) MAX8744 toc17 B A 1ms/div C D E 3.3V 0 5V 0 0 0 3.3V 0 A. ON5, 5V/div B. 5V OUTPUT (VOUT5), 5V/div C. PGOOD5, 5V/div ON3 = REF D. 3.3V OUTPUT (VOUT3), 5V/div E. PGOOD3, 5V/div SMPS DELAYED STARTUP SEQUENCE (ON5 = REF) MAX8744 toc18 B A 1ms/div C D E 3.3V 0 5V 0 0 0 3.3V 0 A. ON3, 5V/div B. 5V OUTPUT (VOUT5), 5V/div C. PGOOD5, 5V/div ON5 = REF D. 3.3V OUTPUT (VOUT3), 5V/div E. PGOOD3, 5V/div SMPS SHUTDOWN WAVEFORMS MAX8744 toc19 B A 1ms/div C D E 3.3V 5V 3.3V 5V 0 0 0 0 A. SHDN, 5V/div B. 5V OUTPUT (VOUT5), 5V/div C. PGOOD5, 5V/div NO LOAD D. 3.3V OUTPUT (VOUT3), 5V/div E. PGOOD3, 5V/div OUT5 LOAD TRANSIENT MAX8744 toc20 B A 20 μs/div C D 5A 5.1V 1A 5A 12V 5.0V 4.9V 0 1A A. IOUT5 = 1A TO 5A, 5A/div B. VOUT5, 50mV/div C. INDUCTOR CURRENT, 5A/div D. LX5, 10V/div OUT3 LOAD TRANSIENT MAX8744 toc21 B A 20 μs/div C D 3A 3.35V 1A 3A 12V 3.30V 3.25V 0 1A A. IOUT3 = 1A TO 3A, 5A/div B. VOUT3, 50mV/div C. INDUCTOR CURRENT, 5A/div D. LX3, 10V/div |
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