Datasheet LTC3866 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | Current Mode Synchronous Controller for Sub Milliohm DCR Sensing |
| 页数 / 页 | 36 / 4 — e lecTrical characTerisTics The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 538 Kb |
| 文件语言 | 英语 |
e lecTrical characTerisTics The. denotes the specifications which apply over the specified operating
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LTC3866
e lecTrical 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 = 15V, VRUN = 5V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
TG/BG tD Top Gate Off to Bottom Gate CLOAD = 3300pF 30 ns On Delay, Synchronous Switch-On Delay Time BG/TG tD Bottom Gate Off to Top Gate CLOAD = 3300pF 30 ns On Delay, Top Switch-On Delay Time tON(MIN) Minimum On-Time (Note 8) 90 ns
INTVCC Linear Regulator
VINTVCC Internal VCC Voltage 6V < VIN < 38V 5.25 5.5 5.75 V Load Regulation IINTVCC = 0mA to 20mA 0.5 2 % VEXTVCC External VCC Switchover EXTVCC Ramping Positive 4.5 4.7 V Voltage EXTVCC Voltage Drop IEXTVCC = 20mA, VEXTVCC = 5V 50 100 mV EXTVCC Hysteresis 200 mV
Oscillator and Phase-Locked Loop
fNOM Nominal Frequency VFREQ = 1.2V 450 500 550 kHz fLOW Lowest Frequency VFREQ = 0.4V 225 250 275 kHz fHIGH Highest Frequency VFREQ > 2.4V 700 770 850 kHz RMODE/PLLIN MODE/PLLIN Input Resistance 250 kΩ IFREQ Frequency Setting Current 9 10 11 µA CLKOUT Phase Relative to the 180 Deg Oscillator Clock CLKOUTHI Clock Output High Voltage VINTVCC = 5.5V 4.5 5.5 V CLKOUTLO Clock Output Low Voltage 0 0.2 V
PGOOD Output
VPGDLO PGOOD Voltage Low IPGOOD = 2mA 0.1 0.3 V IPGD PGOOD Leakage Current VPGOOD = 5.5V 2 µA VPGD PGOOD Trip VFB with Respect to Set Output Voltage VFB Going Negative –10 % VFB Going Positive 10 %
Differential Amplifier
AV Gain –40°C to 85°C l 0.999 1 1.001 V/V –40°C to 125°C l 0.998 1 1.002 V/V RIN Input Resistance Measured at DIFFP Input 80 kΩ VOS Input Offset Voltage VDIFFP = 1.5V, VDIFFOUT = 100µA 2 mV PSRR Power Supply Rejection Ratio 5V < VIN < 38V 90 dB IOUT Maximum Sourcing Output 1.5 3 mA Current VOUT Maximum Output Voltage VINTVCC = 5.5V, IDIFFOUT = 300µA VINTVCC – 1.4 VINTVCC – 1.1 V GBW Gain-Bandwidth Product (Note 9) 3 MHz SR Slew Rate (Note 9) 2 V/µs 3866fc 4 For more information www.linear.com/LTC3866 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional 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 specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 15V, VRUN = 5V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
TG/BG tD Top Gate Off to Bottom Gate CLOAD = 3300pF 30 ns On Delay, Synchronous Switch-On Delay Time BG/TG tD Bottom Gate Off to Top Gate CLOAD = 3300pF 30 ns On Delay, Top Switch-On Delay Time tON(MIN) Minimum On-Time (Note 8) 90 ns
INTVCC Linear Regulator
VINTVCC Internal VCC Voltage 6V < VIN < 38V 5.25 5.5 5.75 V Load Regulation IINTVCC = 0mA to 20mA 0.5 2 % VEXTVCC External VCC Switchover EXTVCC Ramping Positive 4.5 4.7 V Voltage EXTVCC Voltage Drop IEXTVCC = 20mA, VEXTVCC = 5V 50 100 mV EXTVCC Hysteresis 200 mV
Oscillator and Phase-Locked Loop
fNOM Nominal Frequency VFREQ = 1.2V 450 500 550 kHz fLOW Lowest Frequency VFREQ = 0.4V 225 250 275 kHz fHIGH Highest Frequency VFREQ > 2.4V 700 770 850 kHz RMODE/PLLIN MODE/PLLIN Input Resistance 250 kΩ IFREQ Frequency Setting Current 9 10 11 µA CLKOUT Phase Relative to the 180 Deg Oscillator Clock CLKOUTHI Clock Output High Voltage VINTVCC = 5.5V 4.5 5.5 V CLKOUTLO Clock Output Low Voltage 0 0.2 V
PGOOD Output
VPGDLO PGOOD Voltage Low IPGOOD = 2mA 0.1 0.3 V IPGD PGOOD Leakage Current VPGOOD = 5.5V 2 µA VPGD PGOOD Trip VFB with Respect to Set Output Voltage VFB Going Negative –10 % VFB Going Positive 10 %
Differential Amplifier
AV Gain –40°C to 85°C l 0.999 1 1.001 V/V –40°C to 125°C l 0.998 1 1.002 V/V RIN Input Resistance Measured at DIFFP Input 80 kΩ VOS Input Offset Voltage VDIFFP = 1.5V, VDIFFOUT = 100µA 2 mV PSRR Power Supply Rejection Ratio 5V < VIN < 38V 90 dB IOUT Maximum Sourcing Output 1.5 3 mA Current VOUT Maximum Output Voltage VINTVCC = 5.5V, IDIFFOUT = 300µA VINTVCC – 1.4 VINTVCC – 1.1 V GBW Gain-Bandwidth Product (Note 9) 3 MHz SR Slew Rate (Note 9) 2 V/µs 3866fc 4 For more information www.linear.com/LTC3866 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts