Datasheet LTC3537 (Analog Devices) - 3

LTC3537
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. (Note 2) VINB = 1.2V, VOUTB = 3.3V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
RNMOS NMOS Switch On Resistance VOUTB = 1.8V 0.8 Ω VOUTB = 3.3V 0.4 Ω VOUTB = 5V 0.3 Ω RPMOS PMOS Switch On Resistance VOUTB = 1.8V 1 Ω VOUTB = 3.3V 0.6 Ω VOUTB = 5V 0.4 Ω ILIM NMOS Current Limit (Note 4) l 600 750 mA tLIMDELAY Current Limit Delay Time to (Note 3) 40 ns Output 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 %
The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. (Note 2) VINL = 3.3V, VOLDO = 3V, unless otherwise noted. 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 5 V 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 3537fd 3