Datasheet LTC3802 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | Dual 550kHz Synchronous 2-Phase DC/DC Controller with Programmable Up/Down Tracking |
| 页数 / 页 | 28 / 3 — ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 359 Kb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply over the full operating
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LTC3802
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range. (Note 3) VCC = PVCC = BOOST = 5V, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IPVCC PVCC Supply Current VFB = VCMPIN = 0V, No Load 2 mA VRUN/SS = 0V (Notes 5, 6) 1 10 µA IBOOST BOOST Pin Current VFB = VCMPIN = 0V, No Load 1 mA VRUN/SS = 0V (Notes 5, 6) 1 10 µA
Switcher Control Loop
VFB Feedback Voltage VEXTREF = 5V, 0°C ≤ T ≤ 70°C 0.594 0.600 0.606 V VEXTREF = 5V ● 0.591 0.600 0.609 V ∆VFB Feedback Voltage VCC Line Regulation VCC = 4.5V to 6V ±0.01 %/V ∆VOUT Output Voltage Load Regulation (Note 7) 0.1 ±0.2 % AERR Error AMP DC Gain No Load, VEXTREF = VRUN/SS = VCC ● 70 80 dB GBW Error AMP Gain Bandwidth Product f = 100kHz (Note 7) 10 MHz ICOMP Error AMP Output Sink/Source Current VRUN/SS = VCC ±12 mA IFB Voltage Feedback Input Current VFB = 0V to 1V ● ±1 µA ICMPIN Comparators Input Current VCMPIN = 0V to 1V ● ±1 µA IFBT FBT Input Current VFBT = 0V to 1V ● ±1 µA IEXTREF EXTREF Input Current VEXTREF = 0V to 5V ● ±1 µA VEXTREF External Reference Not to Affect VFB ● 1 V ALFF ∆ Drop in Duty Cycle/∆ VINFF VVINFF = 5V to 30V 2.3 %/V RVINFF VINFF Input Resistance 1 MΩ VPGOOD Positive Power Good Threshold With Respect to 0.6V ● 5 10 15 % Negative Power Good Threshold With Respect to 0.6V ● –5 –10 –15 % VOVP Overvoltage Threshold With Respect to VFB 3 5 9 % VBURRS (VCMPIN – VFB) to Reset 15 mV Burst Mode Operation –12 mV VSAW SAW Before Line Compensation 1.2 V IIMAX IMAX Source Current VIMAX = 1V –9.0 –10 –11.0 µA ● –8.5 –10 –11.5 µA ILIM(TH) ILIM Comparator Offset ● –15 0 15 mV VIMAX/ILIM Threshold 5 V/V Hard ILIM/ILIM Threshold VCMPIN = 0V 1.5 V/V ISS RUN/SS Source Current VCMPIN = VFBT = 0.6V, VPHASEMD = VCC –5 –7 –9 µA RUN/SS Sink/Source Current Ratio VCMPIN = VFBT = 0.6V, VPHASEMD = 0V 1.5 2 2.5 µA/µA RUN/SS Sink Current, ILIM VCMPIN = VFBT = 0.6V 100 µA RUN/SS Sink Current, Hard ILIM VCMPIN = VFBT = 0V ● 1 mA VSHDN RUN/SS Shutdown Threshold RUN/SS↑ ● 0.4 0.8 1.2 V
LOGIC and PGOOD
IPHASEMD PHASEMD Pull-Up Current VPHASEMD = 0V –7 µA PHASEMD Pull-Down Current VPHASEMD = 5V 2 µA VIH PLLIN, FCB High Level Input Voltage ● 2.4 V VIL PLLIN, FCB Low Level Input Voltage ● 0.8 V IPGOOD VPGOOD Leakage Current Power Good ±1 µA VOLPG VPGOOD Output Low Voltage IPGOOD = 1mA ● 0.1 0.3 V tPGOOD VPGOOD Falling Edge Delay (Note 8) ● 100 150 µs VPGOOD Rising Edge Delay (Note 8) 10 µs 3802f 3
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range. (Note 3) VCC = PVCC = BOOST = 5V, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IPVCC PVCC Supply Current VFB = VCMPIN = 0V, No Load 2 mA VRUN/SS = 0V (Notes 5, 6) 1 10 µA IBOOST BOOST Pin Current VFB = VCMPIN = 0V, No Load 1 mA VRUN/SS = 0V (Notes 5, 6) 1 10 µA
Switcher Control Loop
VFB Feedback Voltage VEXTREF = 5V, 0°C ≤ T ≤ 70°C 0.594 0.600 0.606 V VEXTREF = 5V ● 0.591 0.600 0.609 V ∆VFB Feedback Voltage VCC Line Regulation VCC = 4.5V to 6V ±0.01 %/V ∆VOUT Output Voltage Load Regulation (Note 7) 0.1 ±0.2 % AERR Error AMP DC Gain No Load, VEXTREF = VRUN/SS = VCC ● 70 80 dB GBW Error AMP Gain Bandwidth Product f = 100kHz (Note 7) 10 MHz ICOMP Error AMP Output Sink/Source Current VRUN/SS = VCC ±12 mA IFB Voltage Feedback Input Current VFB = 0V to 1V ● ±1 µA ICMPIN Comparators Input Current VCMPIN = 0V to 1V ● ±1 µA IFBT FBT Input Current VFBT = 0V to 1V ● ±1 µA IEXTREF EXTREF Input Current VEXTREF = 0V to 5V ● ±1 µA VEXTREF External Reference Not to Affect VFB ● 1 V ALFF ∆ Drop in Duty Cycle/∆ VINFF VVINFF = 5V to 30V 2.3 %/V RVINFF VINFF Input Resistance 1 MΩ VPGOOD Positive Power Good Threshold With Respect to 0.6V ● 5 10 15 % Negative Power Good Threshold With Respect to 0.6V ● –5 –10 –15 % VOVP Overvoltage Threshold With Respect to VFB 3 5 9 % VBURRS (VCMPIN – VFB) to Reset 15 mV Burst Mode Operation –12 mV VSAW SAW Before Line Compensation 1.2 V IIMAX IMAX Source Current VIMAX = 1V –9.0 –10 –11.0 µA ● –8.5 –10 –11.5 µA ILIM(TH) ILIM Comparator Offset ● –15 0 15 mV VIMAX/ILIM Threshold 5 V/V Hard ILIM/ILIM Threshold VCMPIN = 0V 1.5 V/V ISS RUN/SS Source Current VCMPIN = VFBT = 0.6V, VPHASEMD = VCC –5 –7 –9 µA RUN/SS Sink/Source Current Ratio VCMPIN = VFBT = 0.6V, VPHASEMD = 0V 1.5 2 2.5 µA/µA RUN/SS Sink Current, ILIM VCMPIN = VFBT = 0.6V 100 µA RUN/SS Sink Current, Hard ILIM VCMPIN = VFBT = 0V ● 1 mA VSHDN RUN/SS Shutdown Threshold RUN/SS↑ ● 0.4 0.8 1.2 V
LOGIC and PGOOD
IPHASEMD PHASEMD Pull-Up Current VPHASEMD = 0V –7 µA PHASEMD Pull-Down Current VPHASEMD = 5V 2 µA VIH PLLIN, FCB High Level Input Voltage ● 2.4 V VIL PLLIN, FCB Low Level Input Voltage ● 0.8 V IPGOOD VPGOOD Leakage Current Power Good ±1 µA VOLPG VPGOOD Output Low Voltage IPGOOD = 1mA ● 0.1 0.3 V tPGOOD VPGOOD Falling Edge Delay (Note 8) ● 100 150 µs VPGOOD Rising Edge Delay (Note 8) 10 µs 3802f 3