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MAX17014ETM+ Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX17014ETM+ Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 34 page Low-Cost Multiple-Output Power Supply for LCD TVs _______________________________________________________________________________________ 9 Note 2: When the inductor is in continuous conduction (EN2 = VL or heavy load), the output voltage has a DC regulation level lower than the error comparator threshold by 50% of the output voltage ripple. In discontinuous conduction (EN2 = GND with light load), the output voltage has a DC regulation level higher than the error comparator threshold by 50% of the output voltage ripple. Note 3: Disables boost switching if either SUP, SWI, or OVIN exceeds the threshold. Switching resumes when no threshold is exceeded. Note 4: Specifications to -40°C are guaranteed by design, not production tested. ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 1, VIN = IN2 = 12V, AVDD = OVIN = SUP = 15V, TA = -40°C to +85°C. Typical values are at TA = +25°C, unless oth- erwise noted.) (Note 4) PARAMETER CONDITIONS MIN TYP MAX UNITS MODE Voltage Threshold for Enabling DRN Switch Control in Mode 2 GON connects to DRN 1.2 1.3 V MODE Current-Source Stop Voltage Threshold MODE rising edge 2 3 V THR-to-GON Voltage Gain 9.4 10.6 V/V SEQUENCE CONTROL EN1, EN2 Input Low Voltage 0.6 V EN1, EN2 Input High Voltage 1.6 V SWITCHING FREQUENCY SELECTION FSEL Input Low Voltage 600kHz 0.6 V FSEL Input High Voltage 1.2MHz 1.6 V Typical Operating Characteristics (Circuit of Figure 1. VIN = VINL = VSUPP = 12V, AVDD = 16V, VGON = 34.5V, VGOFF = -6V, VOUT1 = 3.3V, TA = +25°C, unless other- wise noted.) STEP-DOWN REGULATOR EFFICIENCY vs. LOAD CURRENT LOAD CURRENT (A) 1 0.1 55 60 65 70 75 80 85 50 0.01 10 EN1 = VL, EN2 = GND EN1 = VL, EN2 = VL STEP-DOWN REGULATOR OUTPUT VOLTAGE vs. LOAD CURRENT LOAD CURRENT (A) 1.60 2.00 1.20 0.80 0.40 3.225 3.250 3.275 3.300 3.325 3.350 3.200 0 2.40 EN1 = VL, EN2 = GND EN1 = VL, EN2 = VL STEP-DOWN REGULATOR LOAD TRANSIENT RESPONSE MAX17014 toc03 10 µs/div A: VOUT, 100mV/div B: LOAD CURRENT, 2A/div C: INDUCTOR CURRENT, 1A/div A B C 0A 3.3V 2A 0.1A |
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