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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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LTM8056 Fiches technique(PDF) 4 Page - Linear Technology |
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LTM8056 Fiches technique(HTML) 4 Page - Linear Technology |
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4 / 42 page  LTC7813 4 7813f For more information www.linear.com/LTC7813 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) VBIAS = 12V, VRUN1,2 = 5V, VEXTVCC = 0V, VDRVSET = 0V, VPRG2 = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Maximum Duty Factor for TG Buck (Channel 1) in Dropout, FREQ = 0V Boost (Channel 2) 97.5 99 100 % % Maximum Duty Factor for BG Buck (Channel 1) in Overvoltage Boost (Channel 2) 100 96 % % ITRACK/SS1 Soft-Start Charge Current VTRACK/SS1 = 0V 8 10 12 µA ISS2 Soft-Start Charge Current VSS2 = 0V 8 10 12 µA VRUN1,2 ON RUN Pin On Threshold VRUN1, VRUN2 Rising l 1.22 1.275 1.33 V RUN Pin Hysteresis 75 mV VSENSE1,2(MAX) Maximum Current Sense Threshold ILIM = Float ILIM = 0V ILIM = INTVCC l l l 65 43 90 75 50 100 85 58 109 mV mV mV Gate Driver TG1,2 Pull-Up On-Resistance Pull-Down On-Resistance VDRVSET = INTVCC 2.2 1.0 Ω Ω BG1,2 Pull-Up On-Resistance Pull-Down On-Resistance VDRVSET = INTVCC 2.2 1.0 Ω Ω BOOST1,2 to DRVCC Switch On-Resistance VSW1,2 = 0V, VDRVSET = INTVCC 3.7 Ω TG Transition Time: Rise Time Fall Time (Note 6) VDRVSET = INTVCC CLOAD = 3300pF CLOAD = 3300pF 25 15 ns ns BG Transition Time: Rise Time Fall Time (Note 6) VDRVSET = INTVCC CLOAD = 3300pF CLOAD = 3300pF 25 15 ns ns Top Gate Off to Bottom Gate On Delay Synchronous Switch-On Delay Time CLOAD = 3300pF Each Driver, VDRVSET = INTVCC Buck (Channel 1) Boost (Channel 2) 55 85 ns ns Bottom Gate Off to Top Gate On Delay Top Switch-On Delay Time CLOAD = 3300pF Each Driver, VDRVSET = INTVCC Buck (Channel 1) Boost (Channel 2) 50 80 ns ns tON(MIN)1 Buck Minimum On-Time (Note 7) VDRVSET = INTVCC 80 ns tON(MIN)2 Boost Minimum On-Time (Note 7) VDRVSET = INTVCC 120 ns DRVCC Linear Regulator DRVCC Voltage from Internal VBIAS LDO VEXTVCC = 0V 7V < VBIAS < 60V, DRVSET = 0V 11V < VBIAS < 60V, DRVSET = INTVCC 5.8 9.6 6.0 10.0 6.2 10.4 V V DRVCC Load Regulation from VBIAS LDO ICC = 0mA to 50mA, VEXTVCC = 0V 0.9 2.0 % DRVCC Voltage from Internal EXTVCC LDO 7V < VEXTVCC < 13V, DRVSET = 0V 11V < VEXTVCC < 13V, DRVSET = INTVCC 5.8 9.6 6.0 10.0 6.2 10.4 V V DRVCC Load Regulation from Internal EXTVCC LDO ICC = 0mA to 50mA, VEXTVCC = 8.5V, VDRVSET = 0V 0.7 2.0 % EXTVCC LDO Switchover Voltage EXTVCC Ramping Positive DRVSET = 0V or RDRVSET ≤ 100kΩ DRVSET = INTVCC 4.5 7.4 4.7 7.7 4.9 8.0 V V EXTVCC Hysteresis 250 mV Programmable DRVCC RDRVSET = 50kΩ, VEXTVCC = 0V 5.0 V Programmable DRVCC RDRVSET = 70kΩ, VEXTVCC = 0V 6.4 7.0 7.6 V Programmable DRVCC RDRVSET = 90kΩ, VEXTVCC = 0V 9.0 V |
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