Datasheet LTC3633A-2, LTC3633A-3 (Analog Devices) - 3

LTC3633A-2/LTC3633A-3
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TJ = 25°C (Note 2). PVIN1 = PVIN2 = SVIN = 12V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SVIN Supply Range l 3.6 20 V PVIN1 Supply Range l 1.5 20 V PVIN2 Supply Range 3.6V < SVIN < 20V l 1.5 20 V Output Voltage Range (Note 4) LTC3633A-2, VON = VOUT 0.6 6 V LTC3633A-3, VON = VOUT 1.5 12 V IQ Input DC Supply Current (PVIN1 + PVIN2 + SVIN) Both Channels Active (Note 5) MODE = 0V 1.3 mA Sleep Current MODE = INTVCC, VFB1, VFB2 > 0.6 500 µA Shutdown RUN1 = RUN2 = 0V 13 µA VFB Feedback Reference Voltage l 0.594 0.6 0.606 V ∆VLINE_REG Reference Voltage Line Regulation PVIN = 3.6V to 20V 0.002 %/V ∆VLOAD_REG Output Voltage Load Regulation ITH = 0.8V to 1.6V 0.05 % IFB Feedback Pin Input Current ±30 nA gm(EA) Error Amplifier Transconductance ITH = 1.2V 1.8 mS tON Minimum On Time VON = 0.6V, PVIN = 4V 20 ns tOFF Minimum Off Time PVIN = 6V 45 ns fOSC Oscillator Frequency VRT = INTVCC 1.4 2 2.6 MHz RT = 162k 1.7 2 2.3 MHz RT = 80.6k 3.4 4 4.6 MHz ILIM Positive Val ey Switch Current Limit 2.6 3.5 4.5 A Negative Inductor Val ey Current Limit –2 A RDS(ON) Top Switch On-Resistance 130 mΩ Bottom Switch On-Resistance 65 mΩ ISW(LKG) Switch Leakage Current PVIN = 20V, VRUN = 0V 0.01 ±1 µA VVIN-OV VIN Overvoltage Lockout Threshold PVIN Rising 22.5 V PVIN Falling 20.3 21.5 22.5 V INTVCC Voltage 3.6V < SVIN < 20V, 0mA Load 3.1 3.3 3.5 V INTVCC Load Regulation 0mA to 50mA Load, SVIN = 4V to 20V 1.3 % RUN Threshold Rising l 1.18 1.22 1.26 V RUN Threshold Fal ing l 0.98 1.01 1.04 V RUN Leakage Current 0 ±3 µA PGOOD Good-to-Bad Threshold VFB Rising 8 10 % VFB Falling –8 –10 % PGOOD Bad-to-Good Threshold VFB Rising –3 –5 % VFB Falling 3 5 % RPGOOD PGOOD Pul -Down Resistance 10mA Load 20 Ω tPGOOD Power Good Filter Time 20 40 µs tSS Internal Soft-Start Time 10% to 90% Rise Time 400 700 µs VFB During Tracking TRACKSS = 0.3V 0.28 0.3 0.315 V ITRACKSS TRACKSS Pul -Up Current 1.4 µA 3633a23fb For more information www.linear.com/LTC3633A-2 3 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Package Description Typical Application Related Parts