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LTM4619EVPBF データシート(PDF) 3 Page - Linear Technology |
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LTM4619EVPBF データシート(HTML) 3 Page - Linear Technology |
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3 / 24 page  LTM4619 3 4619f ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full internal operating temperature range, otherwise specifications are at TA = 25°C, VIN = 12V. Per typical application in Figure 18. Specified as each channel (Note 3). SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IINRUSH(VIN) Input Inrush Current at Start-Up IOUT = 0A, CIN = 10μF, COUT = 100μF, VOUT = 2.5V VIN = 12V 0.25 A IQ(VIN) Input Supply Bias Current VIN = 12V, VOUT1 = 2.5V, Switching Continuous VIN = 12V, VOUT2 = 2.5V, Switching Continuous VIN = 26.5V, VOUT1 = 2.5V, Switching Continuous VIN = 26.5V, VOUT2 = 2.5V, Switching Continuous Shutdown, RUN = 0, VIN = 20V 30 30 40 40 40 mA mA mA mA μA IS(VIN) Input Supply Current VIN = 12V, VOUT = 2.5V, IOUT = 4A VIN = 26.5V, VOUT = 2.5V, IOUT = 4A 0.97 0.480 A A INTVCC Internal VCC Voltage VIN = 12V, VRUN > 2V, No Load 4.8 5 5.2 V EXTVCC EXTVCC Switchover Voltage EXTVCC Ramping Positive l 4.5 4.7 V Output Specifications IOUT1, 2(DC) Output Continuous Current Range VIN = 12V, VOUT = 2.5V (Note 5) 0 4 A ΔVOUT1(LINE) VOUT(NOM) Line Regulation Accuracy VOUT = 2.5V, VIN from 6V to 26.5V IOUT = 0A For Each Output l 0.15 0.25 0.3 0.5 % % ΔVOUT2(LINE) VOUT(NOM) Line Regulation Accuracy VOUT = 2.5V, VIN from 6V to 26.5V IOUT = 0A For Each Output l 0.15 0.25 0.3 0.5 % % ΔVOUT1(LOAD) VOUT1(NOM) Load Regulation Accuracy For Each Output, VOUT = 2.5V, 0A to 4A (Note 5) VIN = 12V l 0.6 0.8 ±% ΔVOUT2(LOAD) VOUT2(NOM) Load Regulation Accuracy For Each Output, VOUT = 2.5V, 0A to 4A (Note 5) VIN = 12V l 0.6 0.8 ±% VOUT1, 2(AC) Output Ripple Voltage IOUT = 0A, COUT = 100μF X5R Ceramic VIN = 12V, VOUT = 2.5V VIN = 26.5V, VOUT = 2.5V 20 25 mV mV fS Output Ripple Voltage Frequency IOUT = 2A, VIN = 12V, VOUT = 2.5V FREQ/PLLFLTR = INTVCC 780 kHz ΔVOUTSTART Turn-On Overshoot COUT = 100μF X5R Ceramic, VOUT = 2.5V, IOUT = 0A VIN = 12V VIN = 26.5V 10 10 mV mV tSTART Turn-On Time COUT = 100μF X5R Ceramic, VOUT = 2.5V, IOUT = 0A Resistive Load, VIN = 12V VIN = 26.5V 0.250 0.130 ms ms ΔVOUTLS Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load COUT = 100μF X5R Ceramic,VOUT = 2.5V, VIN = 12V 15 mV tSETTLE Settling Time for Dynamic Load Step Load: 0% to 50% to 0% of Full Load COUT = 100μF X5R Ceramic,VOUT = 2.5V, VIN = 12V 10 μs IOUTPK Output Current Limit COUT = 100μF X5R Ceramic, VIN = 6V, VOUT = 2.5V VIN = 26.5V, VOUT = 2.5V 12 11 A A Control Section VFB1, VFB2 Voltage at VFB Pin IOUT = 0A, VOUT = 2.5V l 0.792 0.788 0.8 0.8 0.808 0.810 V ITK/SS1, 2 Soft-Start Charge Current VTK/SS = 0V, VOUT = 2.5V 0.9 1.3 1.7 μA DFMAX Maximum Duty Factor In Dropout (Note 4) 97 % tON(MIN) Minimum On-Time (Note 4) 90 ns |
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