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LTC3537EUD-TRPBF Datasheet(PDF) 3 Page - Linear Technology |
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LTC3537EUD-TRPBF Datasheet(HTML) 3 Page - Linear Technology |
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3 / 20 page  LTC3537 3 3537fa ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VINB = 1.2V, VOUTB = 3.3V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS RNMOS NMOS Switch On Resistance VOUTB = 1.8V VOUTB = 3.3V VOUTB = 5V 0.8 0.4 0.3 Ω Ω Ω RPMOS PMOS Switch On Resistance VOUTB = 1.8V VOUTB = 3.3V VOUTB = 5V 1 0.6 0.4 Ω Ω Ω ILIM NMOS Current Limit (Note 4) l 600 750 mA tLIMDELAY Current Limit Delay Time to Output (Note 3) 40 ns Max Duty Cycle VFBB = 1.15V l 87 92 % Min Duty Cycle VFBB = 1.3V l 0% fSW Switching Frequency l 2 2.2 2.4 MHz VENBSTH ENBST Input High Voltage 0.8 V VENBSTL ENBST Input Low Voltage 0.3 V IENBSTIN ENBST Input Current VENBST = 5.5V 1.5 μA VMODEH MODE Input High Voltage 0.8 V VMODEL MODE Input Low Voltage 0.3 V IMODEIN MODE Input Current VMODE = 5.5V 1.5 μA tSS Soft-Start Time 0.5 ms VFBLBI LBI Feedback Voltage Falling Threshold 530 553 575 mV LBI Hysteresis Voltage 35 mV ILBIIN LBI Input Current VLBI = 1V 10 50 nA VLBOLOW LBO Voltage Low ILBO = 5mA 200 mV ILBOLEAK LBO Leakage Current VLBO = 5.5V 0.01 1 μA VPGDBLOW PGDB Voltage Low IPGDB = 5mA 200 mV IPGDBLEAK PGDB Leakage Current VPGDB = 5.5V 0.01 1 μA PGDB Trip Point Voltage VFBB Rising 94 % VOUTB PGDB Hysteresis 6% SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS LDO Regulator VINL Input Voltage Range 1.8 5.5 V VOLDO Output Voltage Range ILOAD = 100mA VFBL 5V IOUTMAX Max Output Current l 100 mA VFBL Feedback Voltage l 590 600 610 mV Line Regulation VINL = 1.8V to 5.5V 0.1 % Load Regulation ILOAD = 10mA to 90mA 0.4 % VDROPOUT Dropout Voltage IO = 50mA 100 mV The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VINL = 3.3V, VOLDO = 3V, unless otherwise noted. |
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