Datasheet LT8609, LT8609A, LT8609B (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 42V, 3A Synchronous Step-Down Regulator with 2.5µA Quiescent Current |
| Pages / Page | 26 / 3 — The. denotes the specifications which apply over the full operating |
| Revision | H |
| File Format / Size | PDF / 327 Kb |
| Document Language | English |
The. denotes the specifications which apply over the full operating
Text Version of Document
LT8609/LT8609A/LT8609B 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 3.0 V l 2.7 3.2 VIN Quiescent Current LT8609/LT8609A: VEN/UV = 0V, VSYNC = 0V 1 4 µA VEN/UV = 2V, Not Switching, VSYNC = 0V l 1.7 12 µA LT8609B: VEN/UV = 0V 1 4 µA VEN/UV = 2V, Not Switching 350 µA VIN Current in Regulation LT8609/LT8609A: VIN = 6V, VOUT = 2.7V, Output Load = 100µA l 46 90 µA VIN = 6V, VOUT = 2.7V, Output Load = 1mA l 480 700 µA Feedback Reference Voltage LT8609/LT8609A: VIN = 6V, ILOAD = 100mA 0.778 0.782 0.786 V VIN = 6V, ILOAD = 100mA l 0.770 0.782 0.794 V LT8609B: VIN = 6V, ILOAD = 100mA 0.772 0.782 0.792 V VIN = 6V, ILOAD = 100mA l 0.759 0.782 0.805 V Feedback Voltage Line Regulation VIN = 4.0V to 40V l 0.02 0.04 %/V Feedback Pin Input Current VFB = 1V l ±20 nA Minimum On-Time ILOAD = 1.5A, SYNC = 0V l 45 75 ns ILOAD = 1.5A, SYNC = 1.9V l 45 60 ns Minimum Off Time 90 130 ns Oscillator Frequency LT8609/LT8609A: RT = 221k, ILOAD = 0.5A l 155 200 245 kHz RT = 60.4k, ILOAD = 0.5A l 640 700 760 kHz RT = 18.2k, ILOAD = 0.5A l 1.925 2.00 2.075 MHz LT8609B: RT = 18.2k, ILOAD = 0.5A l 1.875 2.00 2.125 MHz Top Power NMOS On-Resistance ILOAD = 1A 185 mΩ Top Power NMOS Current Limit l 3.4 4.5 5.7 A Bottom Power NMOS On-Resistance 115 mΩ SW Leakage Current VIN = 42V, VSW = 40V 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 LT8609/LT8609A: VEN/UV = 2V l ±20 nA LT8609B: VEN/UV = 2V l ±30 nA PG Upper Threshold Offset from VFB LT8609/LT8609A: VFB Rising l 5.0 8.5 13.0 % LT8609B: VFB Rising l 4.0 8.5 14.0 % Rev. H For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
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 3.0 V l 2.7 3.2 VIN Quiescent Current LT8609/LT8609A: VEN/UV = 0V, VSYNC = 0V 1 4 µA VEN/UV = 2V, Not Switching, VSYNC = 0V l 1.7 12 µA LT8609B: VEN/UV = 0V 1 4 µA VEN/UV = 2V, Not Switching 350 µA VIN Current in Regulation LT8609/LT8609A: VIN = 6V, VOUT = 2.7V, Output Load = 100µA l 46 90 µA VIN = 6V, VOUT = 2.7V, Output Load = 1mA l 480 700 µA Feedback Reference Voltage LT8609/LT8609A: VIN = 6V, ILOAD = 100mA 0.778 0.782 0.786 V VIN = 6V, ILOAD = 100mA l 0.770 0.782 0.794 V LT8609B: VIN = 6V, ILOAD = 100mA 0.772 0.782 0.792 V VIN = 6V, ILOAD = 100mA l 0.759 0.782 0.805 V Feedback Voltage Line Regulation VIN = 4.0V to 40V l 0.02 0.04 %/V Feedback Pin Input Current VFB = 1V l ±20 nA Minimum On-Time ILOAD = 1.5A, SYNC = 0V l 45 75 ns ILOAD = 1.5A, SYNC = 1.9V l 45 60 ns Minimum Off Time 90 130 ns Oscillator Frequency LT8609/LT8609A: RT = 221k, ILOAD = 0.5A l 155 200 245 kHz RT = 60.4k, ILOAD = 0.5A l 640 700 760 kHz RT = 18.2k, ILOAD = 0.5A l 1.925 2.00 2.075 MHz LT8609B: RT = 18.2k, ILOAD = 0.5A l 1.875 2.00 2.125 MHz Top Power NMOS On-Resistance ILOAD = 1A 185 mΩ Top Power NMOS Current Limit l 3.4 4.5 5.7 A Bottom Power NMOS On-Resistance 115 mΩ SW Leakage Current VIN = 42V, VSW = 40V 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 LT8609/LT8609A: VEN/UV = 2V l ±20 nA LT8609B: VEN/UV = 2V l ±30 nA PG Upper Threshold Offset from VFB LT8609/LT8609A: VFB Rising l 5.0 8.5 13.0 % LT8609B: VFB Rising l 4.0 8.5 14.0 % Rev. H For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
