Datasheet LT8652S (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | Dual Channel 8.5A, 18V, Synchronous Step-Down Silent Switcher with 16µA Quiescent Current |
| 页数 / 页 | 34 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 2.9 Mb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the full operating
文件文字版本
LT8652S
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 3.0 V VIN1 Quiescent Current in Shutdown VEN = 0V, VSYNC = 0V 6 15 µA VIN1 Quiescent Current in Sleep with VEN = 2V, VFB1 = VFB2 > 0.6V, VVC1 = VVC2 = VCC, VSYNC = 0V 16 30 µA Internal Compensation l 100 µA VIN1 Quiescent Current in Sleep with VEN = 2V, VFB1 = VFB2 > 0.6V, VVC1 = VVC2 = FLOAT, VSYNC = 0V 210 260 µA External Compensation l 300 µA VIN Current in Regulation VIN = 6, VOUT = 0.6, Output Load = 50mA, VSYNC = 0V 7 10 mA Feedback Reference Voltage 596 600 604 mV l 592.8 600 607.2 mV Feedback Voltage Line Regulation VIN = 3.0V to 18V l 0.004 0.02 %/V Feedback Pin Input Current VFB = 0.6V –20 20 nA Minimum On-Time ILOAD = 4A, SYNC = FLOAT l 20 45 ns Oscillator Frequency RT = 143k l 255 300 345 kHz RT = 60.4k l 660 700 740 kHz RT = 20k l 1.85 2.00 2.15 MHz Top Power NMOS Current Limit l 22 26.5 32 A Bottom Power NMOS Current Limit 12.5 16.5 20.5 A Top Power NMOS R DS(ON) 24 mΩ Bottom Power NMOS R DS(ON) 8 mΩ SW Leakage Current VIN = 18V, VSW = 0V,18V –15 15 µA EN/UV Pin Threshold EN/UV Falling l 0.76 0.8 0.84 V EN/UV Pin Hysteresis 20 mV EN/UV Pin Current VEN/UV = 2V –20 20 nA PG Upper Threshold Offset from VFB VFB Rising l 3 6.5 11 % PG Lower Threshold Offset from VFB VFB Falling l –3 –7 –11 % PG Hysteresis 0.5 % PG Leakage VPG = 3.3V –40 40 nA PG Pull-Down Resistance VPG = 0.1V l 630 1300 Ω SYNC Threshold SYNC DC and Clock Low Level Voltage 0.4 V SYNC DC High Level Voltage 2.8 V SYNC Clock High Level Voltage 1.5 V SYNC Pin Current VSYNC = 6V 60 µA TR/SS Source Current l 1.0 2.0 3.0 µA TR/SS Pull-Down Resistance Fault Condition, TR/SS = 0.1V 200 Ω Error Amplifier Transconductance VC = 1.2V 1.4 mS VC Source Current VFB = 0.4V, VVC = 1.2V 200 µA VC Sink Current VFB = 0.8V, VVC = 1.2V 225 µA VC Pin to Switch Current Gain 15 A/V TEMP Output Voltage ITEMP = 0µA, Temperature = 25°C 250 mV ITEMP = 0µA, Temperature = 125°C 1250 mV IMON Current ISW = 2A, 12% Duty Cycle 27 30 33 µA ISW = 6A, 12% Duty Cycle l 77 82 87 µA MON Pin Limit Regulation Voltage l 0.95 1.00 1.05 V Rev. 0 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 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 3.0 V VIN1 Quiescent Current in Shutdown VEN = 0V, VSYNC = 0V 6 15 µA VIN1 Quiescent Current in Sleep with VEN = 2V, VFB1 = VFB2 > 0.6V, VVC1 = VVC2 = VCC, VSYNC = 0V 16 30 µA Internal Compensation l 100 µA VIN1 Quiescent Current in Sleep with VEN = 2V, VFB1 = VFB2 > 0.6V, VVC1 = VVC2 = FLOAT, VSYNC = 0V 210 260 µA External Compensation l 300 µA VIN Current in Regulation VIN = 6, VOUT = 0.6, Output Load = 50mA, VSYNC = 0V 7 10 mA Feedback Reference Voltage 596 600 604 mV l 592.8 600 607.2 mV Feedback Voltage Line Regulation VIN = 3.0V to 18V l 0.004 0.02 %/V Feedback Pin Input Current VFB = 0.6V –20 20 nA Minimum On-Time ILOAD = 4A, SYNC = FLOAT l 20 45 ns Oscillator Frequency RT = 143k l 255 300 345 kHz RT = 60.4k l 660 700 740 kHz RT = 20k l 1.85 2.00 2.15 MHz Top Power NMOS Current Limit l 22 26.5 32 A Bottom Power NMOS Current Limit 12.5 16.5 20.5 A Top Power NMOS R DS(ON) 24 mΩ Bottom Power NMOS R DS(ON) 8 mΩ SW Leakage Current VIN = 18V, VSW = 0V,18V –15 15 µA EN/UV Pin Threshold EN/UV Falling l 0.76 0.8 0.84 V EN/UV Pin Hysteresis 20 mV EN/UV Pin Current VEN/UV = 2V –20 20 nA PG Upper Threshold Offset from VFB VFB Rising l 3 6.5 11 % PG Lower Threshold Offset from VFB VFB Falling l –3 –7 –11 % PG Hysteresis 0.5 % PG Leakage VPG = 3.3V –40 40 nA PG Pull-Down Resistance VPG = 0.1V l 630 1300 Ω SYNC Threshold SYNC DC and Clock Low Level Voltage 0.4 V SYNC DC High Level Voltage 2.8 V SYNC Clock High Level Voltage 1.5 V SYNC Pin Current VSYNC = 6V 60 µA TR/SS Source Current l 1.0 2.0 3.0 µA TR/SS Pull-Down Resistance Fault Condition, TR/SS = 0.1V 200 Ω Error Amplifier Transconductance VC = 1.2V 1.4 mS VC Source Current VFB = 0.4V, VVC = 1.2V 200 µA VC Sink Current VFB = 0.8V, VVC = 1.2V 225 µA VC Pin to Switch Current Gain 15 A/V TEMP Output Voltage ITEMP = 0µA, Temperature = 25°C 250 mV ITEMP = 0µA, Temperature = 125°C 1250 mV IMON Current ISW = 2A, 12% Duty Cycle 27 30 33 µA ISW = 6A, 12% Duty Cycle l 77 82 87 µA MON Pin Limit Regulation Voltage l 0.95 1.00 1.05 V Rev. 0 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 Typical Application Related Parts