Datasheet LTC7871 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | Six-Phase, Synchronous Bidirectional Buck or Boost Controller |
| 页数 / 页 | 48 / 4 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 1.4 Mb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the full operating
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LTC7871
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C, VHIGH = 48V, VRUN = 5V unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loops
VHIGH VHIGH Supply Voltage Range 6 100 V VLOW VLOW Supply Voltage Range VHIGH > 6V 1.2 60 V VLOW Regulated Feedback Voltage (Note 4); ITHLOW Voltage = 1.5V l 1.188 1.200 1.212 V VHIGH Regulated Feedback Voltage (Note 4); ITHHIGH Voltage = 0.5V l 1.188 1.200 1.212 V VLOW EA Feedback Current (Note 4) –10 –40 nA VHIGH EA Feedback Current (Note 4) –10 –40 nA Reference Voltage Line Regulation (Note 4); VHIGH = 7V to 80V 0.02 0.2 % VHIGH/VLOW Voltage Load Regulation Measured in Servo Loop, ∆ITH Voltage = 1.0V to 1.5V 0.01 0.2 % Measured in Servo Loop, ∆ITH Voltage = 1.0V to 0.5V –0.01 –0.2 % gm–buck Buck Mode Transconductance (Note 4) ITHLOW = 1.5V, Sink/Source 5µA 2 mmho Amplifier gm–buck gm–boost Boost Mode Transconductance (Note 4) ITHHIGH = 0.5V, Sink/Source 5µA 1 mmho Amplifier gm–boost IQ VHIGH DC Supply Current (Note 5) 10 16 mA Shutdown Mode, VHIGH Supply Current VRUN = 0V; VHIGH = 48V 30 µA Shutdown Mode, VLOW Supply Current VRUN = 0V; VLOW = 12V 20 µA UVLO DRVCC Undervoltage Lockout DRVCC Ramping Down, VDRVSET = VV5 6.9 7.2 7.5 V Threshold DRVCC Ramping Down, VDRVSET = Float 4.8 5.0 5.2 V DRVCC Ramping Down, VDRVSET = 0V 3.9 4.1 4.3 V DRVCC Undervoltage Hysteresis VDRVSET = Float, VV5 0.8 V VDRVSET = 0V 0.5 V V5 Undervoltage Lockout Threshold V5 Ramping Down, VDRVSET = Float, VV5 4.2 4.4 4.6 V V5 Ramping Down, VDRVSET = 0V 3.9 4.1 4.3 V5 Undervoltage Hysteresis VDRVSET = Float, VV5 0.2 V VDRVSET = 0V 0.5 V RUN Pin On Threshold VRUN Rising 1.1 1.22 1.35 V RUN Pin On Hysteresis 80 mV RUN Pin Source Current VRUN < 1.1V l 0.6 2 µA RUN Pin Hysteresis Current VRUN > 1.3V l 2 6 µA ISS Soft-Start Charging Current VSS = 1.2V 0.8 1.0 1.2 µA BUCK Pin Input Threshold VBUCK Rising 2.2 V VBUCK Falling 1.7 V BUCK Pin Pull-Up Resistance BUCK Pin to V5 200 kΩ Maximum Duty Cycle Buck Mode 96 98 % Boost Mode 92 %
Current Monitoring and Regulation Functions
ISNSA+ SNSA+ Pins Input Current ±0.05 ±1 µA ISNSD+ SNSD+ Pins Input Current ±0.05 ±1 µA ISNS– SNS– Pins Input Current 1 mA ILIM Pin Input Resistance 100 kΩ ISETCUR SETCUR Pin Sourcing Current MFR_IDAC_SETCUR = 0x00 l 15.0 16.0 17.0 µA IMON Current Proportional to VLOW at VILIM = Float, RSENSE = 3mΩ ±10 % Max Current IMON Zero Current Voltage 1.240 1.250 1.260 V Rev. 0 4 For more information www.analog.com 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 Serial Port Serial Port Register Details Typical Applications Package Description Typical Application Related Parts
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C, VHIGH = 48V, VRUN = 5V unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loops
VHIGH VHIGH Supply Voltage Range 6 100 V VLOW VLOW Supply Voltage Range VHIGH > 6V 1.2 60 V VLOW Regulated Feedback Voltage (Note 4); ITHLOW Voltage = 1.5V l 1.188 1.200 1.212 V VHIGH Regulated Feedback Voltage (Note 4); ITHHIGH Voltage = 0.5V l 1.188 1.200 1.212 V VLOW EA Feedback Current (Note 4) –10 –40 nA VHIGH EA Feedback Current (Note 4) –10 –40 nA Reference Voltage Line Regulation (Note 4); VHIGH = 7V to 80V 0.02 0.2 % VHIGH/VLOW Voltage Load Regulation Measured in Servo Loop, ∆ITH Voltage = 1.0V to 1.5V 0.01 0.2 % Measured in Servo Loop, ∆ITH Voltage = 1.0V to 0.5V –0.01 –0.2 % gm–buck Buck Mode Transconductance (Note 4) ITHLOW = 1.5V, Sink/Source 5µA 2 mmho Amplifier gm–buck gm–boost Boost Mode Transconductance (Note 4) ITHHIGH = 0.5V, Sink/Source 5µA 1 mmho Amplifier gm–boost IQ VHIGH DC Supply Current (Note 5) 10 16 mA Shutdown Mode, VHIGH Supply Current VRUN = 0V; VHIGH = 48V 30 µA Shutdown Mode, VLOW Supply Current VRUN = 0V; VLOW = 12V 20 µA UVLO DRVCC Undervoltage Lockout DRVCC Ramping Down, VDRVSET = VV5 6.9 7.2 7.5 V Threshold DRVCC Ramping Down, VDRVSET = Float 4.8 5.0 5.2 V DRVCC Ramping Down, VDRVSET = 0V 3.9 4.1 4.3 V DRVCC Undervoltage Hysteresis VDRVSET = Float, VV5 0.8 V VDRVSET = 0V 0.5 V V5 Undervoltage Lockout Threshold V5 Ramping Down, VDRVSET = Float, VV5 4.2 4.4 4.6 V V5 Ramping Down, VDRVSET = 0V 3.9 4.1 4.3 V5 Undervoltage Hysteresis VDRVSET = Float, VV5 0.2 V VDRVSET = 0V 0.5 V RUN Pin On Threshold VRUN Rising 1.1 1.22 1.35 V RUN Pin On Hysteresis 80 mV RUN Pin Source Current VRUN < 1.1V l 0.6 2 µA RUN Pin Hysteresis Current VRUN > 1.3V l 2 6 µA ISS Soft-Start Charging Current VSS = 1.2V 0.8 1.0 1.2 µA BUCK Pin Input Threshold VBUCK Rising 2.2 V VBUCK Falling 1.7 V BUCK Pin Pull-Up Resistance BUCK Pin to V5 200 kΩ Maximum Duty Cycle Buck Mode 96 98 % Boost Mode 92 %
Current Monitoring and Regulation Functions
ISNSA+ SNSA+ Pins Input Current ±0.05 ±1 µA ISNSD+ SNSD+ Pins Input Current ±0.05 ±1 µA ISNS– SNS– Pins Input Current 1 mA ILIM Pin Input Resistance 100 kΩ ISETCUR SETCUR Pin Sourcing Current MFR_IDAC_SETCUR = 0x00 l 15.0 16.0 17.0 µA IMON Current Proportional to VLOW at VILIM = Float, RSENSE = 3mΩ ±10 % Max Current IMON Zero Current Voltage 1.240 1.250 1.260 V Rev. 0 4 For more information www.analog.com 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 Serial Port Serial Port Register Details Typical Applications Package Description Typical Application Related Parts