Datasheet LTC3899 (Analog Devices) - 5
| Fabricante | Analog Devices |
| Descripción | 60V Low IQ, Triple Output, Buck/Buck/Boost Synchronous Controller with PassThru |
| Páginas / Página | 38 / 5 — ELECTRICAL. CHARACTERISTICS The. denotes the specifications which apply … |
| Formato / tamaño de archivo | PDF / 937 Kb |
| Idioma del documento | Inglés |
ELECTRICAL. CHARACTERISTICS The. denotes the specifications which apply over the specified operating
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LTC3899
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, VRUN1,2,3 = 5V, VEXTVCC = 0V, VDRVSET = 0V, VPRG3 = Float unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
BDSW1,2,3 BOOST to DRVCC Switch On-Resistance VSW = 0V, VDRVSET = INTVCC 3.7 Ω TG Transition Time: (Note 6) VDRVSET = INTVCC TG1,2,3 tr Rise Time CLOAD = 3300pF 25 ns TG1,2,3 tf Fall Time CLOAD = 3300pF 15 ns BG Transition Time: (Note 6) VDRVSET = INTVCC BG1,2,3 tr Rise Time CLOAD = 3300pF 25 ns BG1,2,3 tf Fall Time CLOAD = 3300pF 15 ns TG1,2/BG1,2 Top Gate Off to Bottom Gate On Delay CLOAD = 3300pF Each Driver, VDRVSET = INTVCC 55 ns t1D Synchronous Switch-On Delay Time BG1,2/TG1,2 Bottom Gate Off to Top Gate On Delay CLOAD = 3300pF Each Driver, VDRVSET = INTVCC 50 ns t1D Top Switch-On Delay Time TG3/BG3 t1D CH3 Top Gate Off to Bottom Gate On Delay CLOAD = 3300pF Each Driver, VDRVSET = INTVCC 85 ns Bottom Switch-On Delay Time BG3/TG3 t1D CH3 Bottom Gate Off to Top Gate On Delay CLOAD = 3300pF Each Driver, VDRVSET = INTVCC 80 ns Synchronous Switch-On Delay Time tON(MIN)1,2 Buck Minimum On-Time (Note 7) VDRVSET = INTVCC 80 ns tON(MIN)3 Boost Minimum On-Time (Note 7) VDRVSET = INTVCC 120 ns
DRVCC Linear Regulator
VDRVCC(INT) DRVCC Voltage from Internal VBIAS LDO VEXTVCC = 0V 7V < VBIAS < 60V, DRVSET = 0V 5.8 6.0 6.2 V 11V < VBIAS < 60V, DRVSET = INTVCC 9.6 10.0 10.4 V VLDOREG(INT) DRVCC Load Regulation from VBIAS LDO ICC = 0mA to 50mA, VEXTVCC = 0V 0.9 2.0 % VDRVCC(EXT) DRVCC Voltage from Internal EXTVCC LDO 7V < VEXTVCC < 13V, DRVSET = 0V 5.8 6.0 6.2 V 11V < VEXTVCC < 13V, DRVSET = INTVCC 9.6 10.0 10.4 V VLDOREG(EXT) DRVCC Load Regulation from Internal ICC = 0mA to 50mA, VEXTVCC = 8.5V, 0.7 2.0 % EXTVCC LDO VDRVSET = 0V VEXTVCC EXTVCC LDO Switchover Voltage EXTVCC Ramping Positive DRVSET = 0V or RDRVSET ≤ 100kΩ 4.5 4.7 4.9 V DRVSET = INTVCC 7.4 7.7 8.0 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
Oscillator and Phase-Locked Loop
f25kΩ Programmable Frequency RFREQ =25kΩ, PLLIN/MODE = DC Voltage 105 kHz f65kΩ Programmable Frequency RFREQ = 65kΩ, PLLIN/MODE = DC Voltage 375 440 505 kHz f105kΩ Programmable Frequency RFREQ = 105kΩ, PLLIN/MODE = DC Voltage 835 kHz fLOW Low Fixed Frequency VFREQ = 0V, PLLIN/MODE = DC Voltage 320 350 380 kHz fHIGH High Fixed Frequency VFREQ = INTVCC, PLLIN/MODE = DC Voltage 485 535 585 kHz fSYNC Synchronizable Frequency PLLIN/MODE = External Clock l 75 850 kHz PLLIN VIH PLLIN/MODE Input High Level PLLIN/MODE = External Clock l 2.5 V PLLIN VIL PLLIN/MODE Input Low Level PLLIN/MODE = External Clock l 0.5 V
BOOST3 Charge Pump
IBST3 BOOST3 Charge Pump Available Output FREQ = 0V, PLLIN/MODE = INTVCC Current VBOOST3 = 16.5V, VSW3 = 12V 75 µA VBOOST3 = 19V, VSW3 = 12V 35 µA 3899fa For more information www.linear.com/LTC3899 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagrams Operation Typical Applications Package Description 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) VBIAS = 12V, VRUN1,2,3 = 5V, VEXTVCC = 0V, VDRVSET = 0V, VPRG3 = Float unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
BDSW1,2,3 BOOST to DRVCC Switch On-Resistance VSW = 0V, VDRVSET = INTVCC 3.7 Ω TG Transition Time: (Note 6) VDRVSET = INTVCC TG1,2,3 tr Rise Time CLOAD = 3300pF 25 ns TG1,2,3 tf Fall Time CLOAD = 3300pF 15 ns BG Transition Time: (Note 6) VDRVSET = INTVCC BG1,2,3 tr Rise Time CLOAD = 3300pF 25 ns BG1,2,3 tf Fall Time CLOAD = 3300pF 15 ns TG1,2/BG1,2 Top Gate Off to Bottom Gate On Delay CLOAD = 3300pF Each Driver, VDRVSET = INTVCC 55 ns t1D Synchronous Switch-On Delay Time BG1,2/TG1,2 Bottom Gate Off to Top Gate On Delay CLOAD = 3300pF Each Driver, VDRVSET = INTVCC 50 ns t1D Top Switch-On Delay Time TG3/BG3 t1D CH3 Top Gate Off to Bottom Gate On Delay CLOAD = 3300pF Each Driver, VDRVSET = INTVCC 85 ns Bottom Switch-On Delay Time BG3/TG3 t1D CH3 Bottom Gate Off to Top Gate On Delay CLOAD = 3300pF Each Driver, VDRVSET = INTVCC 80 ns Synchronous Switch-On Delay Time tON(MIN)1,2 Buck Minimum On-Time (Note 7) VDRVSET = INTVCC 80 ns tON(MIN)3 Boost Minimum On-Time (Note 7) VDRVSET = INTVCC 120 ns
DRVCC Linear Regulator
VDRVCC(INT) DRVCC Voltage from Internal VBIAS LDO VEXTVCC = 0V 7V < VBIAS < 60V, DRVSET = 0V 5.8 6.0 6.2 V 11V < VBIAS < 60V, DRVSET = INTVCC 9.6 10.0 10.4 V VLDOREG(INT) DRVCC Load Regulation from VBIAS LDO ICC = 0mA to 50mA, VEXTVCC = 0V 0.9 2.0 % VDRVCC(EXT) DRVCC Voltage from Internal EXTVCC LDO 7V < VEXTVCC < 13V, DRVSET = 0V 5.8 6.0 6.2 V 11V < VEXTVCC < 13V, DRVSET = INTVCC 9.6 10.0 10.4 V VLDOREG(EXT) DRVCC Load Regulation from Internal ICC = 0mA to 50mA, VEXTVCC = 8.5V, 0.7 2.0 % EXTVCC LDO VDRVSET = 0V VEXTVCC EXTVCC LDO Switchover Voltage EXTVCC Ramping Positive DRVSET = 0V or RDRVSET ≤ 100kΩ 4.5 4.7 4.9 V DRVSET = INTVCC 7.4 7.7 8.0 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
Oscillator and Phase-Locked Loop
f25kΩ Programmable Frequency RFREQ =25kΩ, PLLIN/MODE = DC Voltage 105 kHz f65kΩ Programmable Frequency RFREQ = 65kΩ, PLLIN/MODE = DC Voltage 375 440 505 kHz f105kΩ Programmable Frequency RFREQ = 105kΩ, PLLIN/MODE = DC Voltage 835 kHz fLOW Low Fixed Frequency VFREQ = 0V, PLLIN/MODE = DC Voltage 320 350 380 kHz fHIGH High Fixed Frequency VFREQ = INTVCC, PLLIN/MODE = DC Voltage 485 535 585 kHz fSYNC Synchronizable Frequency PLLIN/MODE = External Clock l 75 850 kHz PLLIN VIH PLLIN/MODE Input High Level PLLIN/MODE = External Clock l 2.5 V PLLIN VIL PLLIN/MODE Input Low Level PLLIN/MODE = External Clock l 0.5 V
BOOST3 Charge Pump
IBST3 BOOST3 Charge Pump Available Output FREQ = 0V, PLLIN/MODE = INTVCC Current VBOOST3 = 16.5V, VSW3 = 12V 75 µA VBOOST3 = 19V, VSW3 = 12V 35 µA 3899fa For more information www.linear.com/LTC3899 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagrams Operation Typical Applications Package Description Typical Application Related Parts