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LTC3892-1 Datasheet(PDF) 5 Page - Linear Technology |
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LTC3892-1 Datasheet(HTML) 5 Page - Linear Technology |
5 / 36 page LTC3892/LTC3892-1 5 38921f For more information www.linear.com/LTC3892 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, VRUN1,2 = 5V, VEXTVCC = 0V, VDRVSET = 0V, VPRG1 = FLOAT unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VRUN1,2 ON RUN Pin On Threshold VRUN1, VRUN2 Rising l 1.22 1.275 1.33 V VRUN1,2 Hyst RUN Pin Hysteresis 75 mV VSENSE(MAX) Maximum Current Sense Threshold VFB1,2 = 0.7V, VSENSE1,2– = 3.3V ILIM = FLOAT (LTC3892) or LTC3892-1 ILIM = 0V (LTC3892 Only) ILIM = INTVCC (LTC3892 Only) l l l 66 43 90 75 50 100 84 58 109 mV mV mV VSENSE(MATCH) Matching Between VSENSE1(MAX) and VSENSE2(MAX) VFB1,2 = 0.7V, VSENSE1,2– = 3.3V ILIM = FLOAT (LTC3892) or LTC3892-1 ILIM = 0V (LTC3892 Only) ILIM = INTVCC (LTC3892 Only) l l l –8 –8 –8 0 0 0 8 8 8 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 BDSW1,2 BOOST to DRVCC Switch On-Resistance VSW = 0V, VDRVSET = INTVCC 3.7 Ω TG1,2 tr TG1,2 tf TG Transition Time: Rise Time Fall Time (Note 6) VDRVSET = INTVCC CLOAD = 3300pF CLOAD = 3300pF 25 15 ns ns BG1,2 tr BG1,2 tf BG Transition Time: Rise Time Fall Time (Note 6) VDRVSET = INTVCC CLOAD = 3300pF CLOAD = 3300pF 25 15 ns ns TG/BG t1D Top Gate Off to Bottom Gate On Delay Synchronous Switch-On Delay Time CLOAD = 3300pF Each Driver, VDRVSET = INTVCC 55 ns BG/TG t1D Bottom Gate Off to Top Gate On Delay Top Switch-On Delay Time CLOAD = 3300pF Each Driver, VDRVSET = INTVCC 50 ns tON(MIN)1,2 TG Minimum On-Time (Note 7) VDRVSET = INTVCC 80 ns DRVCC Linear Regulator VDRVCC(INT) DRVCC Voltage from Internal VIN LDO VEXTVCC = 0V 7V < VIN < 60V, DRVSET = 0V 11V < VIN < 60V, DRVSET = INTVCC 5.8 9.6 6.0 10.0 6.2 10.4 V V VLDOREG(INT) DRVCC Load Regulation from VIN LDO ICC = 0mA to 50mA, VEXTVCC = 0V 0.9 2.0 % VDRVCC(EXT) 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 VLDOREG(EXT) DRVCC Load Regulation from Internal EXTVCC LDO ICC = 0mA to 50mA, VEXTVCC = 8.5V, VDRVSET = 0V 0.7 2.0 % VEXTVCC EXTVCC LDO Switchover Voltage EXTVCC Ramping Positive DRVUV = 0V DRVUV = INTVCC 4.5 7.4 4.7 7.7 4.9 8.0 V V VLDOHYS EXTVCC Hysteresis 250 mV VDRVCC(50kΩ) Programmable DRVCC RDRVSET = 50kΩ, VEXTVCC = 0V 5.0 V VDRVCC(70kΩ) Programmable DRVCC RDRVSET = 70kΩ, VEXTVCC = 0V 6.4 7.0 7.6 V VDRVCC(90kΩ) Programmable DRVCC RDRVSET = 90kΩ, VEXTVCC = 0V 9.0 V |
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Similar Description - LTC3892-1_15 |
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