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LTM4608 データシート(PDF) 3 Page - Linear Technology |
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LTM4608 データシート(HTML) 3 Page - Linear Technology |
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3 / 24 page  LTM4608 3 4608f ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 5V unless otherwise noted. See Figure 18. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IQ(VIN) Input Supply Bias Current VIN = 3.3V, VOUT = 1.5V, No Switching, Mode = VIN VIN = 3.3V, VOUT = 1.5V, No Switching, Mode = 0V VIN = 3.3V, VOUT = 1.5V, Switching Continuous 400 1.15 55 μA mA mA VIN = 5V, VOUT = 1.5V, No Switching, Mode = VIN VIN = 5V, VOUT = 1.5V, No Switching, Mode = 0V VIN = 5V, VOUT = 1.5V, Switching Continuous 450 1.3 75 μA mA mA Shutdown, RUN = 0, VIN = 5V 1 μA IS(VIN) Input Supply Current VIN = 2.375V, VOUT = 1.5V, IOUT = 5A VIN = 3.3V, VOUT = 1.5V, IOUT = 8A VIN = 5V, VOUT = 1.5V, IOUT = 8A 3.75 4.5 2.93 A A A Output Specifications IOUT(DC) Output Continuous Current Range (See Output Current Derating Curves for Different VIN, VOUT and TA) VOUT = 1.5V VIN = 3.3V, 5.5V VIN = 2.375V 0 0 8 5 A A ΔVOUT(LINE) VOUT Line Regulation Accuracy VOUT = 1.5V, VIN from 2.375V to 5.5V, IOUT = 0A ● 0.1 0.2 %/V ΔVOUT(LOAD) VOUT Load Regulation Accuracy VOUT = 1.5V VIN = 3.3V, 5.5V, ILOAD = 0A to 8A VIN = 2.375V, ILOAD = 0A to 5A ● ● 0.3 0.3 0.75 0.75 % % VOUT(AC) Output Ripple Voltage IOUT = 0A, COUT = 100μF/X5R/Ceramic, VIN = 5V, VOUT = 1.5V 10 mVP-P fS Switching Frequency IOUT = 8A, VIN = 5V, VOUT = 1.5V 1.3 1.5 1.7 MHz fSYNC SYNC Capture Range 0.75 2.25 MHz ΔVOUT(START) Turn-On Overshoot COUT = 100μF, VOUT = 1.5V, IOUT = 0A VIN = 3.3V VIN = 5V 10 10 mV mV tSTART Turn-On Time COUT = 100μF, VOUT = 1.5V, IOUT = 1A, Resistive Load, Track = VIN, VIN = 5V 100 μs ΔVOUT(LS) Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load, COUT = 100μF Ceramic, 100μF POSCAP, VIN = 5V, VOUT = 1.5V 15 mV tSETTLE Settling Time for Dynamic Load Step Load: 0% to 50% to 0% of Full Load, VIN = 5V, VOUT = 1.5V, COUT = 100μF 10 μs IOUT(PK) Output Current Limit COUT = 100μF VIN = 2.375V, VOUT = 1.5V VIN = 3.3V, VOUT = 1.5V VIN = 5V, VOUT = 1.5V 8 11 13 A A A Control Section VFB Voltage at FB Pin IOUT = 0A, VOUT = 1.5V, VIN = 2.375V to 5.5V ● 0.592 0.589 0.596 0.596 0.600 0.603 V V SS Delay Internal Soft-Start Delay 90 μs IFB 0.2 μA VRUN RUN Pin On/Off Threshold RUN Rising RUN Falling 1.4 1.3 1.55 1.4 1.7 1.5 V V |
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