Datasheet LT8619, LT8619-5 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 60V, 1.2A Synchronous Monolithic Buck Regulator with 6μA Quiescent Current |
| Pages / Page | 28 / 3 — ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply … |
| Revision | A |
| File Format / Size | PDF / 1.2 Mb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply over the full operating
Model Line for this Datasheet
LT8619
Text Version of Document
LT8619/LT8619-5
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VEN/UV = 2V unless otherwise noted (Notes 2, 3) PARAMETER CONDITIONS MIN TYP MAX UNITS Switching Loop
VIN Minimum Input Voltage 3.0 V VIN Quiescent Current at No Load VIN = 12V, VEN/UV = 0V 0.6 1.0 µA l 0.6 3.0 µA VIN = 12V, VOUT = 3.3V, RT = 66.5k, VEN/UV = 2V, VSYNC = 0V 6 10 µA l 6 18 µA VIN = 12V, VOUT = 3.3V, RT = 66.5k, VEN/UV = 2V, Floats SYNC 10 µA VIN = 12V, VOUT = 3.3V, RT = 66.5k, VEN/UV = 2V, VSYNC = INTVCC 3 mA VIN Current in Regulation VIN = 12V, VOUT = 3.3V, RT = 66.5k, VEN/UV = 2V, VSYNC = 0V ILOAD = 100µA l 38 65 µA ILOAD = 1mA l 320 400 µA BIAS Pin Current Consumption VIN = 12V, VBIAS = 3.3V, ILOAD = 0.5A, fOSC = 700kHz 2.2 mA Regulated Output Voltage LT8619-5, VIN = 12V, VSYNC = INTVCC, No Load 4.975 5.0 5.025 V l 4.925 5.0 5.075 Feedback Voltage LT8619, VIN = 12V, VSYNC = INTVCC, No Load 0.796 0.8 0.804 V l 0.788 0.8 0.812 V Feedback Voltage Line Regulation VIN = 4V to 50V, VSYNC = INTVCC l ±0.004 ±0.03 %/V Feedback Pin Input Current LT8619, VFB = 0.8V ±20 nA Minimum On-Time LT8619, ILOAD = 0.5A, VSYNC = INTVCC l 30 60 ns Minimum Off-Time 100 150 180 ns Top Switch Peak Current Limit l 1.5 1.75 2.0 A Bottom Switch Current Limit 1.8 A Bottom Switch Reverse Current Limit VSYNC = INTVCC 0.55 A Soft-Start Duration VIN = 12V, VOUT = 3.3V, No Load, COUT = 22µF 0.2 ms EN/UV to PG High Delay CINTVCC = 1µF, VOUT = 3.3V, No Load, COUT = 22µF 0.66 ms EN/UV to PG Low Delay 10 µs
Oscillator and SYNC
Operating Frequency RT = 162k l 260 300 340 kHz RT = 66.5k l 630 700 770 kHz RT = 20k l 1.9 2.0 2.1 MHz Synchronization Frequency fSYNC ≥ fOSC l 0.3 2.2 MHz SYNC Threshold Frequency Synchronization 1 V Burst Mode Operation 0.35 0.6 0.95 V Floats SYNC Pin, Pulse-Skipping Mode 1.2 V Forced Continuous Mode 1.6 2.0 2.4 V SYNC Pin Current Built-In Sourcing Current, VSYNC = 0V –0.2 µA Built-In Sinking Current, VSYNC = 3.3V 3.0 µA Rev A For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information 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. VEN/UV = 2V unless otherwise noted (Notes 2, 3) PARAMETER CONDITIONS MIN TYP MAX UNITS Switching Loop
VIN Minimum Input Voltage 3.0 V VIN Quiescent Current at No Load VIN = 12V, VEN/UV = 0V 0.6 1.0 µA l 0.6 3.0 µA VIN = 12V, VOUT = 3.3V, RT = 66.5k, VEN/UV = 2V, VSYNC = 0V 6 10 µA l 6 18 µA VIN = 12V, VOUT = 3.3V, RT = 66.5k, VEN/UV = 2V, Floats SYNC 10 µA VIN = 12V, VOUT = 3.3V, RT = 66.5k, VEN/UV = 2V, VSYNC = INTVCC 3 mA VIN Current in Regulation VIN = 12V, VOUT = 3.3V, RT = 66.5k, VEN/UV = 2V, VSYNC = 0V ILOAD = 100µA l 38 65 µA ILOAD = 1mA l 320 400 µA BIAS Pin Current Consumption VIN = 12V, VBIAS = 3.3V, ILOAD = 0.5A, fOSC = 700kHz 2.2 mA Regulated Output Voltage LT8619-5, VIN = 12V, VSYNC = INTVCC, No Load 4.975 5.0 5.025 V l 4.925 5.0 5.075 Feedback Voltage LT8619, VIN = 12V, VSYNC = INTVCC, No Load 0.796 0.8 0.804 V l 0.788 0.8 0.812 V Feedback Voltage Line Regulation VIN = 4V to 50V, VSYNC = INTVCC l ±0.004 ±0.03 %/V Feedback Pin Input Current LT8619, VFB = 0.8V ±20 nA Minimum On-Time LT8619, ILOAD = 0.5A, VSYNC = INTVCC l 30 60 ns Minimum Off-Time 100 150 180 ns Top Switch Peak Current Limit l 1.5 1.75 2.0 A Bottom Switch Current Limit 1.8 A Bottom Switch Reverse Current Limit VSYNC = INTVCC 0.55 A Soft-Start Duration VIN = 12V, VOUT = 3.3V, No Load, COUT = 22µF 0.2 ms EN/UV to PG High Delay CINTVCC = 1µF, VOUT = 3.3V, No Load, COUT = 22µF 0.66 ms EN/UV to PG Low Delay 10 µs
Oscillator and SYNC
Operating Frequency RT = 162k l 260 300 340 kHz RT = 66.5k l 630 700 770 kHz RT = 20k l 1.9 2.0 2.1 MHz Synchronization Frequency fSYNC ≥ fOSC l 0.3 2.2 MHz SYNC Threshold Frequency Synchronization 1 V Burst Mode Operation 0.35 0.6 0.95 V Floats SYNC Pin, Pulse-Skipping Mode 1.2 V Forced Continuous Mode 1.6 2.0 2.4 V SYNC Pin Current Built-In Sourcing Current, VSYNC = 0V –0.2 µA Built-In Sinking Current, VSYNC = 3.3V 3.0 µA Rev A For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Revision History Typical Application Related Parts
