Datasheet LTC3626 (Analog Devices) - 3

LTC3626
e lecTrical characTerisTics The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 3). PVIN = SVIN = 12V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
PVIN Input Supply Range l 3.0 20 V SVIN Input Supply Range l 3.6 20 V VVOUT Output Voltage Range (Note 5) VON = VOUT 0.6 6 V IQ Input DC Supply Current Forced Continuous Operation MODE = 0, RRT = 158k, IMONIN, IMONOUT, PVIN TMON, TSET = INTVCC 30 39 µA SVIN 900 1200 µA Sleep Current VFB > 0.6V, IMONIN, IMONOUT, TMON, TSET, PVIN MODE = INTVCC 30 39 µA SVIN 270 350 µA Shutdown ILOAD = 0A, VRUN = 0V PVIN 0.01 2 µA SVIN 13 17 µA VFB Feedback Reference Voltage l 0.594 0.600 0.606 V ∆VLINE(REG) VFB Line Regulation PVIN = SVVIN = 3.6V to 20V 0.01 %/V ∆VLOAD(REG) VFB Load Regulation ITH = 0.6V to 1.5V 0.1 % Feedback Pin Input Current VFB = 0.6V ±30 nA Error Amplifier Transconductance ITH = 1.2V 1.5 mS tON(MIN) Minimum On-Time VVON =1V, PVIN = SVVIN = 3.6V 20 ns tOFF(MIN) Minimum Off-Time PVIN = SVIN = 6V 40 60 ns Valley Switch Current Limit 2.4 2.9 3.6 A Negative Valley Switch Current Limit –1 A fOSC Oscillator Frequency VRT = INTVCC 1.4 2 2.6 MHz RRT = 158k 1.7 2 2.3 MHz RRT = 105k 2.5 3 3.5 MHz RDS(ON) Top Switch On-Resistance 115 mΩ Bottom Switch On-Resistance 70 mΩ IMONOUT Current (Note 6) ISW = 2.5A 148.5 156.25 164.0 µA ISW = 1.5A 89.1 93.75 98.4 µA ISW = 0.5A 29.7 31.25 33.5 µA IOUT Limit Regulation Voltage l 1.15 1.22 1.28 V IMONIN Current (Note 6) ISW = 2.5A, 20% Duty Cycle 29.7 31.25 32.8 µA ISW = 1.5A, 20% Duty Cycle 17.8 18.75 19.7 µA ISW = 0.5A, 20% Duty Cycle 5.9 6.25 6.7 µA IIN Limit Regulation Voltage l 1.15 1.22 1.28 V Internal Temperature Monitor TA = 25°C 1.5 V Internal Temperature Monitor Slope (Note 7) 200 °C/V Temperature Limit Hysteresis 50 mV PVIN Overvoltage Lockout Threshold PVIN Rising 21.5 V PVIN Falling 20 20.5 V VINTVCC INTVCC Voltage 3.6V < PVIN = SVVIN < 20V 3.1 3.3 3.5 V INTVCC Load Regulation (Note 8) IINTVCC = 0mA to 20mA 0.6 % VRUN RUN Threshold RUN Rising l 1.19 1.23 1.27 V RUN Falling l 0.97 1.0 1.03 V RUN Leakage Current PVVIN = SVVIN = 20V 0 ±1 μA 3626fa For more information www.linear.com/LTC3626 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts