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MAX1917EEE Datasheet(PDF) 4 Page - Maxim Integrated Products |
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MAX1917EEE Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 18 page Tracking, Sinking and Sourcing, Synchronous Buck Controller for DDR Memory and Termination Supplies 4 _______________________________________________________________________________________ ELECTRICAL CHARACTERISTICS (continued) (V+ = 12V, VEN/HSD = VDDR = 2.5V, CVL = 4.7µF, CVTTR = 1µF, CREF = 0.22µF, VFSEL = 0, ILIM = VL, PGND = LX = POK = GND, BST = VL. Specifications are for TA = 0°C to +85°C. Typical values are at TA = +25°C, unless otherwise specified.) PARAMETER CONDITIONS MIN TYP MAX UNITS Logic VL Level FSEL = VL VL - 0.4 V EN/HSD LOGIC EN/HSD Shutdown Current Max IEN/HSD for VEN/HSD = 0.8V 0.5 3.0 µA Logic High VL = V+ = 4.5V to 5.5V, 100mV hysteresis 1.45 V Logic Low VL = V+ = 4.5V to 5.5V 0.8 V POWER-OK OUTPUT Upper VTT Threshold 110 112 114 %VDDR/ 2 Lower VTT Threshold 86 88 90 %VDDR/ 2 Upper VTTR Threshold 110 112 114 %VDDR/ 2 Lower VTTR Threshold 86 88 90 %VDDR/ 2 POK Output Low Level ISINK = 2mA 0.4 V POK Output High Leakage VPOK = 5.5V 5 µA ELECTRICAL CHARACTERISTICS (V+ = 12V, VEN/HSD = VDDR = 2.5V, CVL = 4.7µF, CVTTR = 1µF, CREF = 0.22µF, VFSEL = 0, ILIM = VL, PGND = LX = POK = GND, BST = VL. Specifications are for TA = -40°C to +85°C, unless otherwise specified.) (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS 5.5 14.0 V V+ Input Voltage Range VL = V+ 4.5 5.5 V EN/HSD Input Voltage Range Enabled 1.5 15.0 V DDR Input Voltage Range 0 3.6 V V+ Supply Current VTT = 2.0V 1.2 mA DDR Supply Current 250 µA EN/HSD Supply Current VEN/HSD = 2.5V 10 µA VL Supply Current VL = V+ = 5.5V 1.2 mA V+ Shutdown Supply Current EN/HSD = 0V 5 µA DDR Shutdown Supply Current EN/HSD = 0V 1 µA VL Shutdown Supply Current VL = V+ = 5.5V 5 µA VL Undervoltage Lockout Threshold Rising edge, hysteresis = 40mV 4.05 4.40 V VTT VTT Input Bias Current VVTT = 2.5V -0.15 0 µA VTT Feedback Voltage Range 0 1.8 V Overload range, VDDR = 1.8V 49.5 50.5 VTT Feedback Voltage Accuracy Overload range, VDDR = 3.6V 49.5 50.5 %VDDR REFERENCE Reference Output Voltage V+ = VL = 4.5V to 5.5V, IREF = 0 1.98 2.02 V Reference Load Regulation V+ = VL = 5V, IREF = 0 to 50µA 10 mV |
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