Datasheet LTC3829 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | 3-Phase, Single Output Synchronous Step-Down DC/DC Controller with Diffamp |
| 页数 / 页 | 40 / 4 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| 修订版 | E |
| 文件格式/大小 | PDF / 960 Kb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the full operating
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LTC3829
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN = 5V, unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
TG Transition Time (Note 6) TG1,2,3 tr Rise Time CLOAD = 3300pF 25 ns TG1,2,3 tf Fall Time CLOAD = 3300pF 25 ns BG Transition Time (Note 6) BG1,2,3 tr Rise Time CLOAD = 3300pF 25 ns BG1,2,3 tf Fall Time CLOAD = 3300pF 25 ns TG/BG t1D Top Gate Off to Bottom Gate On Delay CLOAD = 3300pF Each Driver 30 ns Synchronous Switch-On Delay Time BG/TG t2D Bottom Gate Off to Top Gate On Delay CLOAD = 3300pF Each Driver 30 ns Top Switch-On Delay Time tON(MIN) Minimum On-Time (Note 7) 90 ns
INTVCC Linear Regulator
VINTVCC Internal VCC Voltage 6V < VIN ≤ 38V 4.8 5.0 5.2 V VLDO INT INTVCC Load Regulation ICC = 0mA to 20mA 0.5 2.0 % VEXTVCC EXTVCC Switchover Voltage EXTVCC Ramping Positive l 4.5 4.7 V VLDO EXT EXTVCC Voltage Drop ICC = 20mA, VEXTVCC = 5V 50 100 mV VLDOHYS EXTVCC Hysteresis 200 mV
Oscillator and Phase-Locked Loop
fNOM Nominal Frequency VFREQ = 1.2V 450 500 550 kHz fLOW Lowest Frequency VFREQ = 0V 210 250 290 kHz fHIGH Highest Frequency VFREQ ≥ 2.4V 700 770 850 kHz RPLLN PLLIN Input Resistance 100 kΩ IFREQ Frequency Setting Current 9 10 11 µA IISET Shed and Burst Mode Program 6.5 7.5 8.5 µA Current CLKOUT Phase (Relative to Controller 1) Non-Shedding Mode 60 Deg Channel 2 and 3 Shedding 180 Deg CLKHIGH Clock High Output Voltage 4 5 V CLKLOW Clock Low Output Voltage 0 0.2 V
PGOOD Output
VPGL PGOOD Voltage Low IPGOOD = 2mA 0.1 0.3 V IPGOOD PGOOD Leakage Current VPGOOD = 5V 0 ±2 µA VPG PGOOD Trip Level, Either Controller VFB with Respect to Set Output Voltage VFB Ramping Negative –12 –10 –7 % VFB Ramping Positive 8 10 13 %
Differential Amplifier
ADA Gain l 0.997 1 1.003 V/V RIN Input Resistance Measured at DIFFP Input 80 kΩ VOS Input Offset Voltage VDIFFP = VDIFFOUT = 1.5V, 2.5 mV IDIFFOUT = 100µA PSRR Power Supply Rejection Ratio 5V < VIN < 38V 100 dB ICL Maximum Output Current 3 mA VOUT(MAX) Maximum Output Voltage INTVCC = 5V, IDIFFOUT = 300µA VINTVCC – 1.4 VINTVCC – 1.1 V GBW Gain-Bandwidth Product (Note 8) 3 MHz SR Slew Rate (Note 8) 2 V/µs Rev. E 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Application Package Description Revision History Typical Application Related Parts
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN = 5V, unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
TG Transition Time (Note 6) TG1,2,3 tr Rise Time CLOAD = 3300pF 25 ns TG1,2,3 tf Fall Time CLOAD = 3300pF 25 ns BG Transition Time (Note 6) BG1,2,3 tr Rise Time CLOAD = 3300pF 25 ns BG1,2,3 tf Fall Time CLOAD = 3300pF 25 ns TG/BG t1D Top Gate Off to Bottom Gate On Delay CLOAD = 3300pF Each Driver 30 ns Synchronous Switch-On Delay Time BG/TG t2D Bottom Gate Off to Top Gate On Delay CLOAD = 3300pF Each Driver 30 ns Top Switch-On Delay Time tON(MIN) Minimum On-Time (Note 7) 90 ns
INTVCC Linear Regulator
VINTVCC Internal VCC Voltage 6V < VIN ≤ 38V 4.8 5.0 5.2 V VLDO INT INTVCC Load Regulation ICC = 0mA to 20mA 0.5 2.0 % VEXTVCC EXTVCC Switchover Voltage EXTVCC Ramping Positive l 4.5 4.7 V VLDO EXT EXTVCC Voltage Drop ICC = 20mA, VEXTVCC = 5V 50 100 mV VLDOHYS EXTVCC Hysteresis 200 mV
Oscillator and Phase-Locked Loop
fNOM Nominal Frequency VFREQ = 1.2V 450 500 550 kHz fLOW Lowest Frequency VFREQ = 0V 210 250 290 kHz fHIGH Highest Frequency VFREQ ≥ 2.4V 700 770 850 kHz RPLLN PLLIN Input Resistance 100 kΩ IFREQ Frequency Setting Current 9 10 11 µA IISET Shed and Burst Mode Program 6.5 7.5 8.5 µA Current CLKOUT Phase (Relative to Controller 1) Non-Shedding Mode 60 Deg Channel 2 and 3 Shedding 180 Deg CLKHIGH Clock High Output Voltage 4 5 V CLKLOW Clock Low Output Voltage 0 0.2 V
PGOOD Output
VPGL PGOOD Voltage Low IPGOOD = 2mA 0.1 0.3 V IPGOOD PGOOD Leakage Current VPGOOD = 5V 0 ±2 µA VPG PGOOD Trip Level, Either Controller VFB with Respect to Set Output Voltage VFB Ramping Negative –12 –10 –7 % VFB Ramping Positive 8 10 13 %
Differential Amplifier
ADA Gain l 0.997 1 1.003 V/V RIN Input Resistance Measured at DIFFP Input 80 kΩ VOS Input Offset Voltage VDIFFP = VDIFFOUT = 1.5V, 2.5 mV IDIFFOUT = 100µA PSRR Power Supply Rejection Ratio 5V < VIN < 38V 100 dB ICL Maximum Output Current 3 mA VOUT(MAX) Maximum Output Voltage INTVCC = 5V, IDIFFOUT = 300µA VINTVCC – 1.4 VINTVCC – 1.1 V GBW Gain-Bandwidth Product (Note 8) 3 MHz SR Slew Rate (Note 8) 2 V/µs Rev. E 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Application Package Description Revision History Typical Application Related Parts