Datasheet LTC7150S, LTC7150S-4 (Analog Devices) - 3

LTC7150S/LTC7150S-4
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 12V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SVIN SVIN Operating Voltage l 3.1 20 V PVIN PVIN Operating Voltage 20 V VOUT VOUT Operating Voltage 0.6 5.5 V IQ Input Quiescent Current (Note 3) Active Mode 2 4 mA Shutdown Mode; VRUN = 0V 20 40 µA VFB Feedback Reference Voltage (Note 4) ITH = 1.0V 0.598 0.600 0.602 V ITH = 1.0V, –40°C to 150°C l 0.594 0.600 0.606 V ∆VLINE_REG Feedback Voltage Line Regulation VIN = 3.1V to 20V l 0.04 %/V –40°C to 150°C ∆VLOAD_REG Feedback Voltage Load Regulation ITH = 0.5V to 1.5V l 0.2 % –40°C to 150°C IFB Feedback Pin Input Current –50 50 nA gm(EA) Error Amplifier Transconductance ITH = 1.0V 1.0 1.3 1.6 mS tON(MIN) Minimum On-Time l 20 25 nS tOFF(MIN) Minimum Off-Time 50 nS ILIM Positive Inductor Valley Current Limit FB = 0.58V l 21 24 27 A ILIM-ITH Current Limit at Different ITH Voltage ITH = 1.4V l 9.5 12 14.5 A ITH = 1V l –2.5 0 2.5 A ITH = 0.6V l –14.5 –12 –9.5 A ITH = 0.2V l –27 –24 –21 A RTOP Top Power NMOS On-Resistance INTVCC = 3.3V 6 mΩ RBOT Bottom Power NMOS On-Resistance INTVCC = 3.3V 2.5 mΩ ISW Top Switch Leakage VIN = 20V, VSW = 0V 0.1 1 µA (Note 5) Bottom Switch Leakage VIN = 20V, VSW = 20V 1 50 µA VUVLO INTVCC Undervoltage Lockout Threshold INTVCC Falling 2.45 2.6 2.75 V INTVCC Hysteresis (Rising) 250 mV VRUN RUN Rising 1.15 1.20 1.25 V RUN Falling Hysteresis 100 mV IRUN Run Leakage Current 100 nA VINTVCC Internal VCC Voltage 3.2 3.3 3.4 V OV Output Overvoltage VFB Rising 6 8 10 % PGOOD Upper Threshold VFB Falling Hysteresis 10 mV UV Output Undervoltage VFB Falling –10 –8 –6 % PGOOD Lower Threshold VFB Rising Hysteresis 10 mV RPGOOD PGOOD Pull-Down Resistance VPGOOD = 100mV 8 15 Ω IPGOOD PGOOD Leakage VFB = 0.6V 2 µA tPGOOD PGOOD Delay PGOOD Low to High 6 cycles PGOOD High to Low 25 cycles ITRACK/SS Track Pull-Up Current VTRACK/SS = 0V 6 10 µA fOSC Oscillator Frequency RT = 162kΩ l 0.9 1 1.15 MHz fSYNC SYNC Capture Range % of Programmed Frequency 70 130 % Rev. B For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Typical Applications Package Photo Revision History Typical Application Related Parts