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MAX797H Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX797H Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 8 page High-Voltage, Step-Down Controller with Synchronous Rectifier for CPU Power _______________________________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS (continued) (V+ = 15V, GND = PGND = 0V, IVL = IREF = 0A, TA = 0°C to +85°C, SYNC = 0V, unless otherwise noted.) SHDN, 0V or 30V SHDN, SKIP SYNC SYNC = 0V or 5V No external load (Note 1) SYNC = REF Guaranteed by design CSH = CSL = 6V V+ = 4V, CSL = 0V (Note 2) SYNC = 0V or 5V SHDN = 0V, V+ = 30V, CSL = 0V or 6V Falling edge 0µA < IREF < 100µA SYNC = REF SHDN = 0V, CSL = 6V, V+ = 0V or 30V, VL = 0V CONDITIONS 2.0 2.0 V VL - 0.5 Input High Voltage % 93 96 89 91 Maximum Duty Factor kHz 190 340 Oscillator Sync Range ns 200 SYNC Rise/Fall Time ns 200 SYNC Low Pulse Width ns 200 SYNC High Pulse Width 125 150 175 kHz 270 300 330 Oscillator Frequency 2.45 2.505 2.55 V Reference Output Voltage mW 4.8 6.6 Quiescent Power Consumption mW 4 8 Dropout Power Consumption 1 5 µA V+ Shutdown Current V 1.8 2.3 Reference Fault Lockout Voltage mV 50 Reference Load Regulation µA 0.1 1 CSL Shutdown Leakage Current UNITS MIN TYP MAX PARAMETER FB = CSH = CSL = 6V, VL switched over to CSL 1 5 µA V+ Off-State Leakage Current DL forced to 2V FB, FB = REF CSH, CSL, CSH = CSL = 4V, device not shut down SYNC, SKIP A 1 DL Sink/Source Current ±100 50 1.0 SHDN, SKIP SYNC 0.5 V 0.8 Input Low Voltage DH forced to 2V, BST - LX = 4.5V A 1 DH Sink/Source Current High or low, BST - LX = 4.5V High or low Ω 7 DH On-Resistance Ω 7 DL On-Resistance OSCILLATOR AND INPUTS/OUTPUTS nA Input Current µA |
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