Datasheet LTC3601 (Analog Devices) - 3

LTC3601
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VVIN = 12V, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VVIN Input Supply Range l 4 15 V IQ Input DC Supply Current Forced Continuous Operation MODE = 0V 700 1000 µA Sleep Current MODE = INTVCC, VFB > 0.6V 300 500 µA Shutdown RUN = 0V 14 25 µA VFB Feedback Reference Voltage l 0.594 0.600 0.606 V ∆VLINEREG Reference Voltage Line Regulation VVIN = 4V to 15V 0.01 %/V ∆VLOADREG Output Voltage Load Regulation ITH = 0.6V to 1.6V 0.1 % IFB Feedback Pin Input Current VFB = 0.6V ±30 nA gm(EA) Error Amplifier Transconductance ITH = 1.2V 2.0 mS tON(MIN) Minimum On-Time VON = 1V, VIN = 4V 20 ns tOFF(MIN) Minimum Off-Time VIN = 6V 40 60 ns ILIM Valley Switch Current Limit 1.7 2.2 2.8 A Negative Valley Switch Current Limit –1.2 A fOSC Oscillator Frequency VRT = INTVCC 1.4 2 2.6 MHz RRT = 160k 1.7 2 2.3 MHz RRT = 80k 3.4 4 4.6 MHz RDS(ON) Top Switch On-Resistance 130 mΩ Bottom Switch On-Resistance 100 mΩ VVIN-OV VIN Overvoltage Lockout Threshold VIN Rising l 16.8 17.5 18 V VIN Falling l 15.8 16.5 17 V VINTVCC INTVCC Voltage 4V < VIN < 15V 3.15 3.3 3.45 V ∆INTVCC INTVCC Load Regulation (Note 4) IINTVCC = 0mA to 20mA 0.6 % VUVLO INTVCC Undervoltage Lockout INTVCC Rising, VIN = INTVCC 2.75 2.9 V Threshold INTVCC Falling, VIN = INTVCC 2.45 V VRUN RUN Threshold RUN Rising l 1.21 1.25 1.29 V RUN Falling l 0.97 1.0 1.03 V IRUN(LKG) RUN Leakage Current VVIN = 15V 0 ±3 µA VFB_GB PGOOD Good-to-Bad Threshold FB Rising 8 10 % FB Falling –8 –10 % VFB_BG PGOOD Bad-to-Good Threshold FB Rising –3 –5 % FB Falling 3 5 % tPGOOD Power Good Filter Time 20 40 µs RPGOOD PGOOD Pull-Down Resistance 10mA Load 15 Ω ISW(LKG) Switch Leakage Current VRUN = 0V 0.01 1 µA tSS Internal Soft-Start Time VFB from 10% to 90% Full Scale 400 700 µs VFB_TRACK TRACK Pin TRACK = 0.3V 0.28 0.3 0.315 V ITRACK TRACK Pull-Up Current 1.4 µA VMODE/SYNC MODE Threshold Voltage MODE VIH l 1.0 V MODE VIL l 0.4 V SYNC Threshold Voltage SYNC VIH l 0.95 V IMODE MODE Input Current MODE = 0V –1.5 µA MODE = INTVCC 1.5 µA 3601fc For more information www.linear.com/LTC3601 3 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Related Parts