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LTC7130 Datasheet(PDF) 3 Page - Linear Technology |
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LTC7130 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 36 page  LTC7130 3 7130fb For more information www.linear.com/LTC7130 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, VRUN = 5V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IFB Feedback Current (Note 4) –15 –50 nA VREFLNREG Reference Voltage Line Regulation VIN = 4.5V to 20V (Note 4) 0.002 0.02 % VLOADREG Output Voltage Load Regulation (Note 4) Measured in Servo Loop; ∆ITH Voltage = 1.2V to 0.7V Measured in Servo Loop; ∆ITH Voltage = 1.2V to 1.6V l l 0.01 0.01 0.1 0.1 % % gm Error Amplifier (EA) Transconductance ITH =1.2V, Sink/Source 5µA (Note 4) 2 mmho IQ Input DC Supply Current Normal Mode Shutdown (Note 5) VRUN = 0V 3.8 30 50 mA µA UVLO Undervoltage Lockout VINTVCC Ramping Down 3.4 3.75 4.1 V UVLOHYS UVLO Hysteresis Voltage 0.5 V VFBOVL Feedback Overvoltage Lockout Measured at VFB l 0.64 0.66 0.68 V ISNSD+ SNSD+ Pin Bias Current VSNSD+ = 3.3V 30 100 nA ISNSA+ SNSA+ Pin Bias Current VSNSA+ = 3.3V 1 2 µA AVT_SNS Total Sense Signal Gain to Current Comparator 5 V/V VSENSE(MAX) Maximum Current Sense Threshold –40°C to 125°C VSNS– = 1.8V, ILIM = 0V ILIM = 1/4VINTVCC ILIM = 1/2VINTVCC or Float ILIM = 3/4VINTVCC ILIM = VINTVCC l l l l l 8.8 14 19 23.5 28.3 10 15 20 25 30 11.2 16 21 26.5 31.7 mV mV mV mV mV ITEMP DCR Temperature Compensation Current VITEMP = 0.3V l 9 10 11 µA ITK/SS Soft-Start Charge Current VTK/SS = 0V l 1.0 1.25 1.5 µA VRUN RUN Pin on Threshold Voltage VRUN Rising l 1.1 1.22 1.35 V VRUN(HYS) RUN Pin on Hysteresis Voltage 80 mV tON(MIN) Minimum On-Time (Note 6) 90 ns INTVCC Linear Regulator VINTVCC Internal VCC Voltage 6V < VIN < 20V 5.25 5.5 5.75 V Load Regulation IINTVCC = 0mA to 20mA 0.5 2 % VEXTVCC External VCC Switchover Voltage EXTVCC Ramping Positive 4.5 4.7 V EXTVCC Voltage Drop IEXTVCC = 20mA, VEXTVCC = 5.5V 40 100 mV EXTVCC Hysteresis 250 mV Oscillator and Phase-Locked Loop fNOM Nominal Frequency VFREQ = 1.2V 450 500 550 kHz fLOW Lowest Frequency VFREQ = 0.4V 225 250 275 kHz fHIGH Highest Frequency VFREQ > 2.4V 700 770 850 kHz RMODE/PLLIN MODE/PLLIN Input Resistance 250 kΩ IFREQ Frequency Setting Current 9 10 11 µA |
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