Datasheet LTC7130 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 20V 20A Monolithic Buck Converter with Ultralow DCR Sensing |
| Pages / Page | 36 / 3 — ELECTRICAL. CHARACTERISTICS The. denotes the specifications which apply … |
| File Format / Size | PDF / 1.5 Mb |
| Document Language | English |
ELECTRICAL. CHARACTERISTICS The. denotes the specifications which apply over the specified operating
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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 VIN = 4.5V to 20V (Note 4) 0.002 0.02 % Regulation VLOADREG Output Voltage Load (Note 4) Regulation Measured in Servo Loop; ∆ITH Voltage = 1.2V to 0.7V l 0.01 0.1 % Measured in Servo Loop; ∆ITH Voltage = 1.2V to 1.6V l 0.01 0.1 % gm Error Amplifier (EA) ITH =1.2V, Sink/Source 5µA (Note 4) 2 mmho Transconductance IQ Input DC Supply Current (Note 5) Normal Mode 3.8 mA Shutdown VRUN = 0V 30 50 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 5 V/V Current Comparator VSENSE(MAX) Maximum Current Sense –40°C to 125°C Threshold VSNS– = 1.8V, ILIM = 0V l 8.8 10 11.2 mV ILIM = 1/4VINTVCC l 14 15 16 mV ILIM = 1/2VINTVCC or Float l 19 20 21 mV ILIM = 3/4VINTVCC l 23.5 25 26.5 mV ILIM = VINTVCC l 28.3 30 31.7 mV ITEMP DCR Temperature VITEMP = 0.3V l 9 10 11 µA Compensation Current 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 80 mV Voltage 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 EXTVCC Ramping Positive 4.5 4.7 V Voltage 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 7130fb For more information www.linear.com/LTC7130 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Application Related Parts .34579 Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Typical Application Related Parts
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 VIN = 4.5V to 20V (Note 4) 0.002 0.02 % Regulation VLOADREG Output Voltage Load (Note 4) Regulation Measured in Servo Loop; ∆ITH Voltage = 1.2V to 0.7V l 0.01 0.1 % Measured in Servo Loop; ∆ITH Voltage = 1.2V to 1.6V l 0.01 0.1 % gm Error Amplifier (EA) ITH =1.2V, Sink/Source 5µA (Note 4) 2 mmho Transconductance IQ Input DC Supply Current (Note 5) Normal Mode 3.8 mA Shutdown VRUN = 0V 30 50 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 5 V/V Current Comparator VSENSE(MAX) Maximum Current Sense –40°C to 125°C Threshold VSNS– = 1.8V, ILIM = 0V l 8.8 10 11.2 mV ILIM = 1/4VINTVCC l 14 15 16 mV ILIM = 1/2VINTVCC or Float l 19 20 21 mV ILIM = 3/4VINTVCC l 23.5 25 26.5 mV ILIM = VINTVCC l 28.3 30 31.7 mV ITEMP DCR Temperature VITEMP = 0.3V l 9 10 11 µA Compensation Current 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 80 mV Voltage 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 EXTVCC Ramping Positive 4.5 4.7 V Voltage 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 7130fb For more information www.linear.com/LTC7130 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Application Related Parts .34579 Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Typical Application Related Parts
