Datasheet LTC3636, LTC3636-1 (Analog Devices) - 3

LTC3636/LTC3636-1
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TJ = 25°C (Note 2). VIN1 = VIN2 = 12V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN1 Supply Range l 3.1 20 V VIN1 Supply Range l 3.1 20 V VIN2 Supply Range 3.1V < VIN1 < 20V l 1.5 20 V Output Voltage Range (Note 4) LTC3636 0.6 5 V LTC3636-1 1.8 12 V IQ Input DC Supply Current (VIN1 + VIN2) Both Channels Active (Note 5) MODE = 0V 1.3 mA Sleep Current MODE = INTVCC, VFB1, VFB2 > 0.6 600 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 VIN = 3.1V 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 30 nA gm(EA) Error Amplifier Transconductance ITH = 1.2V 1.8 mS tON Minimum On-Time LTC3636 30 35 ns LTC3636-1 30 tOFF Minimum Off-Time 100 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 Valley Switch Current Limit ITH = 1.8V 6 6.6 7.2 A Negative Valley Switch Current Limit –4.2 A RDS(ON) Top Switch On-Resistance 32 mΩ Bottom Switch On-Resistance 18 mΩ ISW(LKG) Switch Leakage Current VIN = 20V, VRUN = 0V –1 0.01 1 µA Internal Temperature Monitor TA = 25°C 1.5 V Internal Temperature Monitor Slope (Note 6) 200 °C/V VVIN-OV VIN Overvoltage Lockout Threshold VIN Rising 22.5 V VIN Falling 20.3 21.5 22.5 V INTVCC Voltage 3.6V < VIN < 20V, 0mA Load 3.1 3.3 3.5 V INTVCC Load Regulation 0mA to 50mA Load, VIN = 4V to 20V 1.3 % INTVCC Undervoltage Lockout Threshold INTVCC Rising, VIN = INTVCC 2.7 2.9 V INTVCC Falling, VIN = INTVCC 2.55 V RUN Threshold Rising l 1.16 1.22 1.28 V RUN Threshold Falling l 0.96 1.01 1.06 V RUN Leakage Current –3 0 3 µA PGOOD Good-to-Bad Threshold VFB Rising 8 10 % VFB Falling –10 –8 % PGOOD Bad-to-Good Threshold VFB Rising –5 –3 % VFB Falling 3 5 % Rev. C For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts