Datasheet LT8650S (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | Dual Channel 4A, 42V, Synchronous Step-Down Silent Switcher 2 with 6.2µA Quiescent Current |
| 页数 / 页 | 32 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| 修订版 | B |
| 文件格式/大小 | PDF / 3.3 Mb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the full operating
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LT8650S
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage l 2.6 3 V VIN1 Quiescent Current in Shutdown VEN/UV1 = VEN/UV2 = 0V, VSYNC = 0V 1.7 4 µA l 10 µA VIN1 + VCC Quiescent Current in VEN/UV1 = VEN/UV2 = 2V, VFB1 = VFB2 >0.8V, VVC1 = VVC2 = VCC, 3.7 8 µA Sleep with Internal Compensation VSYNC = 0V l 20 µA VIN1 + VCC Quiescent Current in VEN/UV1 = VEN/UV2 = 2V, VFB1 = VFB2 >0.8V, VVC1 = VVC2 = Float, 90 120 µA Sleep with External Compensation VSYNC = 0V l 140 µA VIN1 + VCC Quiescent Current when VEN/UV1 = VEN/UV2 = 2V, VFB1 = VFB2 >0.8V, VVC1 = VVC2 = VCC, VSYNC = 3.4V l 5 7 mA Active VIN Current in Regulation VIN = 12V, VOUT = 3.3V, Output Load = 100µA, VVC1 = VVC2 = VCC, VSYNC = 0V 45 75 µA VIN = 12V, VOUT = 3.3V, Output Load = 1mA, VVC1 = VVC2 = VCC, VSYNC = 0V 350 550 µA Feedback Reference Voltage 0.794 0.800 0.806 V l 0.790 0.800 0.810 V Feedback Voltage Line Regulation VIN = 4.0V to 36V 0.004 0.02 %/V Feedback Pin Input Current VFB = 0.8V –20 20 nA Minimum On-Time ILOAD = 3A, SYNC ≥ 2V l 40 60 ns Oscillator Frequency RT = 133k l 270 300 330 kHz RT = 35.7k l 0.94 1.0 1.06 MHz RT = 15k l 1.85 2.00 2.15 MHz Top Power NMOS Current Limit 10 12 14 A Bottom Power NMOS Current Limit 6.5 8.5 10.5 A SW Leakage Current VIN = 42V, VSW = 0V,42V –2 2 µA EN/UV Pin Threshold EN/UV Falling l 0.7 0.74 0.78 V EN/UV Pin Hysteresis 30 mV EN/UV Pin Current VEN/UV = 2V –20 20 nA PG Upper Threshold Offset from VFB VFB Falling l 5.4 7.2 9 % PG Lower Threshold Offset from VFB VFB Rising l –9.3 –7.5 –5.7 % PG Hysteresis 0.3 % PG Leakage VPG = 12V –40 40 nA PG Pull-Down Resistance VPG = 0.1V l 600 1200 Ohm SYNC Threshold SYNC DC and Clock Low Level Voltage 0.4 V SYNC Clock High Level Voltage 1.5 V SYNC DC High Level Voltage 2.8 V SYNC Pin Current VSYNC = 6V 120 µA SS Source Current l 1.0 2.0 3.0 µA SS Pull-Down Resistance Fault Condition, SS = 0.1V 200 Ω Error Amplifier Transconductance VC = 1.25V 0.9 mS VC Source Current VFB = 0.6V, VVC = 1.25V 185 µA VC Sink Current VFB = 1.0V, VVC = 1.25V 185 µA VC Pin to Switch Current Gain 9.6 A/V TEMP Output Voltage ITEMP = 0µA, Temperature = 25°C 250 mV ITEMP = 0µA, Temperature = 125°C 1200 mV Rev. B For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage l 2.6 3 V VIN1 Quiescent Current in Shutdown VEN/UV1 = VEN/UV2 = 0V, VSYNC = 0V 1.7 4 µA l 10 µA VIN1 + VCC Quiescent Current in VEN/UV1 = VEN/UV2 = 2V, VFB1 = VFB2 >0.8V, VVC1 = VVC2 = VCC, 3.7 8 µA Sleep with Internal Compensation VSYNC = 0V l 20 µA VIN1 + VCC Quiescent Current in VEN/UV1 = VEN/UV2 = 2V, VFB1 = VFB2 >0.8V, VVC1 = VVC2 = Float, 90 120 µA Sleep with External Compensation VSYNC = 0V l 140 µA VIN1 + VCC Quiescent Current when VEN/UV1 = VEN/UV2 = 2V, VFB1 = VFB2 >0.8V, VVC1 = VVC2 = VCC, VSYNC = 3.4V l 5 7 mA Active VIN Current in Regulation VIN = 12V, VOUT = 3.3V, Output Load = 100µA, VVC1 = VVC2 = VCC, VSYNC = 0V 45 75 µA VIN = 12V, VOUT = 3.3V, Output Load = 1mA, VVC1 = VVC2 = VCC, VSYNC = 0V 350 550 µA Feedback Reference Voltage 0.794 0.800 0.806 V l 0.790 0.800 0.810 V Feedback Voltage Line Regulation VIN = 4.0V to 36V 0.004 0.02 %/V Feedback Pin Input Current VFB = 0.8V –20 20 nA Minimum On-Time ILOAD = 3A, SYNC ≥ 2V l 40 60 ns Oscillator Frequency RT = 133k l 270 300 330 kHz RT = 35.7k l 0.94 1.0 1.06 MHz RT = 15k l 1.85 2.00 2.15 MHz Top Power NMOS Current Limit 10 12 14 A Bottom Power NMOS Current Limit 6.5 8.5 10.5 A SW Leakage Current VIN = 42V, VSW = 0V,42V –2 2 µA EN/UV Pin Threshold EN/UV Falling l 0.7 0.74 0.78 V EN/UV Pin Hysteresis 30 mV EN/UV Pin Current VEN/UV = 2V –20 20 nA PG Upper Threshold Offset from VFB VFB Falling l 5.4 7.2 9 % PG Lower Threshold Offset from VFB VFB Rising l –9.3 –7.5 –5.7 % PG Hysteresis 0.3 % PG Leakage VPG = 12V –40 40 nA PG Pull-Down Resistance VPG = 0.1V l 600 1200 Ohm SYNC Threshold SYNC DC and Clock Low Level Voltage 0.4 V SYNC Clock High Level Voltage 1.5 V SYNC DC High Level Voltage 2.8 V SYNC Pin Current VSYNC = 6V 120 µA SS Source Current l 1.0 2.0 3.0 µA SS Pull-Down Resistance Fault Condition, SS = 0.1V 200 Ω Error Amplifier Transconductance VC = 1.25V 0.9 mS VC Source Current VFB = 0.6V, VVC = 1.25V 185 µA VC Sink Current VFB = 1.0V, VVC = 1.25V 185 µA VC Pin to Switch Current Gain 9.6 A/V TEMP Output Voltage ITEMP = 0µA, Temperature = 25°C 250 mV ITEMP = 0µA, Temperature = 125°C 1200 mV Rev. B For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts