Datasheet LT8705 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 80V VIN and VOUT Synchronous 4-Switch Buck-Boost DC/DC Controller |
| Pages / Page | 44 / 5 — e lecTrical characTerisTics The. denotes the specifications which apply … |
| File Format / Size | PDF / 508 Kb |
| Document Language | English |
e lecTrical characTerisTics The. denotes the specifications which apply over the full operating
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LT8705
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, SHDN = 3V unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
CSPIN, CSNIN Common Mode Operating Voltage Range l 1.5 80 V CSPIN, CSNIN Differential Operating Voltage Range l –100 100 mV VCSPIN-CSNIN to IMON_IN Amplifier A7 gm VCSPIN – VCSNIN = 50mV, VCSPIN = 5.025V (All Grades) 0.95 1 1.05 mmho (LT8705E, LT8705I) l 0.94 1 1.06 mmho (LT8705H, LT8705MP) l 0.93 1 1.07 mmho IMON_IN Maximum Output Current l 100 µA IMON_IN Overvoltage Threshold l 1.55 1.61 1.67 V IMON_IN Error Amp EA2 gm 185 µmho IMON_IN Error Amp EA2 Voltage Gain 130 V/V CSPOUT, CSNOUT Bias Current BOOST Capacitor Charge Control Block Not Active ICSPOUT + ICSNOUT, VCSPOUT = VCSNOUT = 12V 45 µA ICSPOUT + ICSNOUT, VCSPOUT = VCSNOUT = 1.5V 4 µA CSPOUT, CSNOUT Common Mode Operating Voltage Range l 0 80 V CSPOUT, CSNOUT Differential Mode Operating Voltage l –100 100 mV Range VCSPOUT-CSNOUT to IMON_OUT Amplifier A6 gm VCSPOUT – VCSNOUT = 50mV, VCSPOUT = 5.025V (All Grades) 0.95 1 1.05 mmho (LT8705E, LT8705I) l 0.94 1 1.085 mmho (LT8705H, LT8705MP) l 0.93 1 1.095 mmho VCSPOUT – VCSNOUT = 5mV, VCSPOUT = 5.0025V (All Grades) 0.65 1 1.35 mmho (LT8705E, LT8705I) l 0.55 1 1.6 mmho (LT8705H, LT8705MP) l 0.5 1 1.65 mmho IMON_OUT Maximum Output Current l 100 µA IMON_OUT Overvoltage Threshold l 1.55 1.61 1.67 V IMON_OUT Error Amp EA1 gm 185 µmho IMON_OUT Error Amp EA1 Voltage Gain 130 V/V SRVO_IIN Activation Threshold (Note 5) (VIMON_IN Rising) – (Regulation Voltage for –60 –49 –37 mV IMON_IN), VFBIN = 3V, VFBOUT = 0V, VIMON_OUT = 0V SRVO_IIN Activation Threshold Hysteresis (Note 5) VFBIN = 3V, VFBOUT = 0V, VIMON_OUT = 0V 22 mV SRVO_IOUT Activation Threshold (Note 5) (VIMON_OUT Rising) – (Regulation Voltage for IMON_ –62 –51 –39 mV OUT), VFBIN = 3V, VFBOUT = 0V, VIMON_IN = 0V SRVO_IOUT Activation Threshold Hysteresis (Note 5) VFBIN = 3V, VFBOUT = 0V, VIMON_IN = 0V 22 mV SRVO_IIN, SRVO_IOUT Low Voltage (Note 5) I = 100μA l 110 330 mV SRVO_IIN, SRVO_IOUT Leakage Current (Note 5) VSRVO_IIN = VSRVO_IOUT = 2.5V l 0 1 µA
NMOS Gate Drivers
TG1, TG2 Rise Time CLOAD = 3300pF (Note 4) 20 ns TG1, TG2 Fall Time CLOAD = 3300pF (Note 4) 20 ns BG1, BG2 Rise Time CLOAD = 3300pF (Note 4) 20 ns BG1, BG2 Fall Time CLOAD = 3300pF (Note 4) 20 ns TG1 Off to BG1 On Delay CLOAD = 3300pF Each Driver 100 ns BG1 Off to TG1 On Delay CLOAD = 3300pF Each Driver 80 ns TG2 Off to BG2 On Delay CLOAD = 3300pF Each Driver 100 ns 8705ff For more information www.linear.com/LT8705 5 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, SHDN = 3V unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
CSPIN, CSNIN Common Mode Operating Voltage Range l 1.5 80 V CSPIN, CSNIN Differential Operating Voltage Range l –100 100 mV VCSPIN-CSNIN to IMON_IN Amplifier A7 gm VCSPIN – VCSNIN = 50mV, VCSPIN = 5.025V (All Grades) 0.95 1 1.05 mmho (LT8705E, LT8705I) l 0.94 1 1.06 mmho (LT8705H, LT8705MP) l 0.93 1 1.07 mmho IMON_IN Maximum Output Current l 100 µA IMON_IN Overvoltage Threshold l 1.55 1.61 1.67 V IMON_IN Error Amp EA2 gm 185 µmho IMON_IN Error Amp EA2 Voltage Gain 130 V/V CSPOUT, CSNOUT Bias Current BOOST Capacitor Charge Control Block Not Active ICSPOUT + ICSNOUT, VCSPOUT = VCSNOUT = 12V 45 µA ICSPOUT + ICSNOUT, VCSPOUT = VCSNOUT = 1.5V 4 µA CSPOUT, CSNOUT Common Mode Operating Voltage Range l 0 80 V CSPOUT, CSNOUT Differential Mode Operating Voltage l –100 100 mV Range VCSPOUT-CSNOUT to IMON_OUT Amplifier A6 gm VCSPOUT – VCSNOUT = 50mV, VCSPOUT = 5.025V (All Grades) 0.95 1 1.05 mmho (LT8705E, LT8705I) l 0.94 1 1.085 mmho (LT8705H, LT8705MP) l 0.93 1 1.095 mmho VCSPOUT – VCSNOUT = 5mV, VCSPOUT = 5.0025V (All Grades) 0.65 1 1.35 mmho (LT8705E, LT8705I) l 0.55 1 1.6 mmho (LT8705H, LT8705MP) l 0.5 1 1.65 mmho IMON_OUT Maximum Output Current l 100 µA IMON_OUT Overvoltage Threshold l 1.55 1.61 1.67 V IMON_OUT Error Amp EA1 gm 185 µmho IMON_OUT Error Amp EA1 Voltage Gain 130 V/V SRVO_IIN Activation Threshold (Note 5) (VIMON_IN Rising) – (Regulation Voltage for –60 –49 –37 mV IMON_IN), VFBIN = 3V, VFBOUT = 0V, VIMON_OUT = 0V SRVO_IIN Activation Threshold Hysteresis (Note 5) VFBIN = 3V, VFBOUT = 0V, VIMON_OUT = 0V 22 mV SRVO_IOUT Activation Threshold (Note 5) (VIMON_OUT Rising) – (Regulation Voltage for IMON_ –62 –51 –39 mV OUT), VFBIN = 3V, VFBOUT = 0V, VIMON_IN = 0V SRVO_IOUT Activation Threshold Hysteresis (Note 5) VFBIN = 3V, VFBOUT = 0V, VIMON_IN = 0V 22 mV SRVO_IIN, SRVO_IOUT Low Voltage (Note 5) I = 100μA l 110 330 mV SRVO_IIN, SRVO_IOUT Leakage Current (Note 5) VSRVO_IIN = VSRVO_IOUT = 2.5V l 0 1 µA
NMOS Gate Drivers
TG1, TG2 Rise Time CLOAD = 3300pF (Note 4) 20 ns TG1, TG2 Fall Time CLOAD = 3300pF (Note 4) 20 ns BG1, BG2 Rise Time CLOAD = 3300pF (Note 4) 20 ns BG1, BG2 Fall Time CLOAD = 3300pF (Note 4) 20 ns TG1 Off to BG1 On Delay CLOAD = 3300pF Each Driver 100 ns BG1 Off to TG1 On Delay CLOAD = 3300pF Each Driver 80 ns TG2 Off to BG2 On Delay CLOAD = 3300pF Each Driver 100 ns 8705ff For more information www.linear.com/LT8705 5 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
