Datasheet LT8608, LT8608B (Analog Devices) - 3
| Fabricante | Analog Devices |
| Descripción | 42V, 1.5A Synchronous Step-Down Regulator with 2.5µA Quiescent Current |
| Páginas / Página | 24 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| Revisión | E |
| Formato / tamaño de archivo | PDF / 2.8 Mb |
| Idioma del documento | Inglés |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the full operating
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Versión de texto del documento
LT8608/LT8608B
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 2.5 3.0 V l 3.2 VIN Quiescent Current VEN/UV = 0V, VSYNC = 0V 1 4 µA VEN/UV = 2V, Not Switching, VSYNC = 0V or LT8608 DFN, VIN ≤ 36V l 1.7 12 µA VIN Current in Regulation VIN = 6V, VOUT = 2.7V, Output Load = 100µA l 56 90 µA VIN = 6V, VOUT = 2.7V, Output Load = 1mA l 500 700 µA Feedback Reference Voltage MSOP Package VIN = 6V, ILOAD = 100mA 0.774 0.778 0.782 V VIN = 6V, ILOAD = 100mA l 0.762 0.778 0.798 V DFN Package VIN = 6V, ILOAD = 100mA 0.773 0.778 0.783 V VIN = 6V, ILOAD = 100mA l 0.753 0.778 0.803 V Feedback Voltage Line Regulation VIN = 4.0V to 40V l ±0.02 ±0.06 %/V Feedback Pin Input Current VFB = 1V l ±20 nA Minimum On-Time ILOAD = 1A, SYNC = 0V or LT8608 DFN l 35 65 ns ILOAD = 1A, SYNC = 1.9V or LT8608B DFN l 35 60 ns Minimum Off Time 93 130 ns Oscillator Frequency MSOP Package RT = 221k, ILOAD = 500mA l 155 200 245 kHz RT = 60.4k, ILOAD = 500mA l 640 700 760 kHz RT = 18.2k, ILOAD = 500mA l 1.90 2.00 2.10 MHz DFN Package RT = 221k, ILOAD = 500mA l 130 200 270 kHz RT = 60.4k, ILOAD = 500mA l 610 700 790 kHz RT = 18.2k, ILOAD = 200mA l 1.85 2.00 2.15 MHz Top Power NMOS On-Resistance ILOAD = 0.5A 350 mΩ Top Power NMOS Current Limit l 2.1 2.9 3.9 A Bottom Power NMOS On-Resistance 230 mΩ SW Leakage Current VIN = 36V l 15 µA EN/UV Pin Threshold EN/UV Rising l 0.99 1.05 1.11 V EN/UV Pin Hysteresis 50 mV EN/UV Pin Current VEN/UV = 2V l ±20 nA PG Upper Threshold Offset from VFB VFB Rising l 5.0 8.5 13.0 % PG Lower Threshold Offset from VFB VFB Falling l 5.0 8.5 13.0 % PG Hysteresis 0.5 % PG Leakage VPG = 42V l ±200 nA PG Pull-Down Resistance VPG = 0.1V 550 1200 Ω Sync Low Input Voltage MSOP Only l 0.4 0.9 V Sync High Input Voltage INTVCC = 3.5V, MSOP Only l 2.7 3.2 V TR/SS Source Current MSOP Only l 1 2 3 µA TR/SS Pull-Down Resistance Fault Condition, TR/SS = 0.1V, MSOP Only 300 900 Ω Spread Spectrum Modulation VSYNC = 3.3V, MSOP Only l 0.5 3 6 kHz Frequency Rev. E For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical 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 2.5 3.0 V l 3.2 VIN Quiescent Current VEN/UV = 0V, VSYNC = 0V 1 4 µA VEN/UV = 2V, Not Switching, VSYNC = 0V or LT8608 DFN, VIN ≤ 36V l 1.7 12 µA VIN Current in Regulation VIN = 6V, VOUT = 2.7V, Output Load = 100µA l 56 90 µA VIN = 6V, VOUT = 2.7V, Output Load = 1mA l 500 700 µA Feedback Reference Voltage MSOP Package VIN = 6V, ILOAD = 100mA 0.774 0.778 0.782 V VIN = 6V, ILOAD = 100mA l 0.762 0.778 0.798 V DFN Package VIN = 6V, ILOAD = 100mA 0.773 0.778 0.783 V VIN = 6V, ILOAD = 100mA l 0.753 0.778 0.803 V Feedback Voltage Line Regulation VIN = 4.0V to 40V l ±0.02 ±0.06 %/V Feedback Pin Input Current VFB = 1V l ±20 nA Minimum On-Time ILOAD = 1A, SYNC = 0V or LT8608 DFN l 35 65 ns ILOAD = 1A, SYNC = 1.9V or LT8608B DFN l 35 60 ns Minimum Off Time 93 130 ns Oscillator Frequency MSOP Package RT = 221k, ILOAD = 500mA l 155 200 245 kHz RT = 60.4k, ILOAD = 500mA l 640 700 760 kHz RT = 18.2k, ILOAD = 500mA l 1.90 2.00 2.10 MHz DFN Package RT = 221k, ILOAD = 500mA l 130 200 270 kHz RT = 60.4k, ILOAD = 500mA l 610 700 790 kHz RT = 18.2k, ILOAD = 200mA l 1.85 2.00 2.15 MHz Top Power NMOS On-Resistance ILOAD = 0.5A 350 mΩ Top Power NMOS Current Limit l 2.1 2.9 3.9 A Bottom Power NMOS On-Resistance 230 mΩ SW Leakage Current VIN = 36V l 15 µA EN/UV Pin Threshold EN/UV Rising l 0.99 1.05 1.11 V EN/UV Pin Hysteresis 50 mV EN/UV Pin Current VEN/UV = 2V l ±20 nA PG Upper Threshold Offset from VFB VFB Rising l 5.0 8.5 13.0 % PG Lower Threshold Offset from VFB VFB Falling l 5.0 8.5 13.0 % PG Hysteresis 0.5 % PG Leakage VPG = 42V l ±200 nA PG Pull-Down Resistance VPG = 0.1V 550 1200 Ω Sync Low Input Voltage MSOP Only l 0.4 0.9 V Sync High Input Voltage INTVCC = 3.5V, MSOP Only l 2.7 3.2 V TR/SS Source Current MSOP Only l 1 2 3 µA TR/SS Pull-Down Resistance Fault Condition, TR/SS = 0.1V, MSOP Only 300 900 Ω Spread Spectrum Modulation VSYNC = 3.3V, MSOP Only l 0.5 3 6 kHz Frequency Rev. E For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts