Datasheet LT8619, LT8619-5 (Analog Devices) - 7
| Fabricante | Analog Devices |
| Descripción | 60V, 1.2A Synchronous Monolithic Buck Regulator with 6μA Quiescent Current |
| Páginas / Página | 28 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS. Power Good, Overvoltage. Minimum On … |
| Revisión | A |
| Formato / tamaño de archivo | PDF / 1.2 Mb |
| Idioma del documento | Inglés |
TYPICAL PERFORMANCE CHARACTERISTICS. Power Good, Overvoltage. Minimum On T. Minimum On-Time. Minimum Off-Time. Power Good, Over
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LT8619
Versión de texto del documento
LT8619/LT8619-5
TYPICAL PERFORMANCE CHARACTERISTICS Power Good, Overvoltage Minimum On T Minimum On-Time Minimum Off-Time Power Good, Over Threshold voltage Threshold
120 180 10.0 VOUT = 3.3V PPG V f FB RISING SW = 2MHz 7.5 100 FORCED CONTINUOUS MODE PPG V 170 5.0 FB FALLING 80 NO LOAD 2.5 OV TAGE THRESHOLD (%) 60 160 0 VOL 0.5A LOAD 0.2A LOAD –2.5 40 MINIMUM ON-TIME (ns) MINIMUM OFF TIME (ns) 150 NO LOAD 0.5A LOAD –5.0 NPG VFB RISING 20 –7.5 NPG VFB FALLING 0 140 POWER GOOD, OVER –10.0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8619 G19 8619 G20 8619 G21
Power Good Delay IN V UVLO IBIAS vs Load
100 3.0 12 VOUT = 1.6V, NO LOAD VIN = 12V fSW = 700kHz VOUT = 3.3V FORCED CONTINUOUS MODE 10 2.9 FORCED CONTINUOUS MODE 75 Y (µs) V 8 IN RISING 2.8 50 (mA) 6 UVLO (V) 2.7 f I BIAS SW = 2MHz V IN 4 POWER GOOD DELA 25 2.6 VIN FALLING 2 fSW = 700kHz 0 2.5 0 0 20 40 60 80 100 –50 –25 0 25 50 75 100 125 150 0 0.2 0.4 0.6 0.8 1.0 1.2 VFB – VPGTH (mV) TEMPERATURE (°C) LOAD CURRENT (A) 8619 G22 8619 G23 8619 G24
IBIAS vs fSW IBIAS at 700kHz vs Temperature IBIAS I at 2MHz vs Temperature BIAS at 2MHz vs T
10 10 24 VIN = 12V V 1.2A LOAD IN = 12V VIN = 12V VOUT = 3.3V VOUT = 3.3V VOUT = 5V L = 10µH BIAS = V 20 1.2A LOAD BIAS = V 8 8 OUT OUT FORCED CONTINUOUS MODE FORCED CONTINUOUS MODE 1A LOAD FORCED CONTINUOUS MODE 1A LOAD (CONTINUOUS OPERATION (CONTINUOUS OPERATION ABOVE MAX JUNCTION 16 ABOVE MAX JUNCTION 6 6 TEMPERATURE MAY TEMPERATURE MAY PERMANENTLY PERMANENTLY 1A LOAD (mA) (mA) DAMAGE THE (mA) 12 DAMAGE THE NO LOAD DEVICE) DEVICE) I BIAS 4 I BIAS 4 0.5A LOAD I BIAS 0.5A LOAD 8 NO LOAD 2 2 NO LOAD 4 0 0 0 0.2 0.6 1.0 1.4 1.8 2.2 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 fSW (MHz) TEMPERATURE (°C) TEMPERATURE (°C) 8619 G25 8619 G26 8619 G27 Rev A For more information www.analog.com 7 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
TYPICAL PERFORMANCE CHARACTERISTICS Power Good, Overvoltage Minimum On T Minimum On-Time Minimum Off-Time Power Good, Over Threshold voltage Threshold
120 180 10.0 VOUT = 3.3V PPG V f FB RISING SW = 2MHz 7.5 100 FORCED CONTINUOUS MODE PPG V 170 5.0 FB FALLING 80 NO LOAD 2.5 OV TAGE THRESHOLD (%) 60 160 0 VOL 0.5A LOAD 0.2A LOAD –2.5 40 MINIMUM ON-TIME (ns) MINIMUM OFF TIME (ns) 150 NO LOAD 0.5A LOAD –5.0 NPG VFB RISING 20 –7.5 NPG VFB FALLING 0 140 POWER GOOD, OVER –10.0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8619 G19 8619 G20 8619 G21
Power Good Delay IN V UVLO IBIAS vs Load
100 3.0 12 VOUT = 1.6V, NO LOAD VIN = 12V fSW = 700kHz VOUT = 3.3V FORCED CONTINUOUS MODE 10 2.9 FORCED CONTINUOUS MODE 75 Y (µs) V 8 IN RISING 2.8 50 (mA) 6 UVLO (V) 2.7 f I BIAS SW = 2MHz V IN 4 POWER GOOD DELA 25 2.6 VIN FALLING 2 fSW = 700kHz 0 2.5 0 0 20 40 60 80 100 –50 –25 0 25 50 75 100 125 150 0 0.2 0.4 0.6 0.8 1.0 1.2 VFB – VPGTH (mV) TEMPERATURE (°C) LOAD CURRENT (A) 8619 G22 8619 G23 8619 G24
IBIAS vs fSW IBIAS at 700kHz vs Temperature IBIAS I at 2MHz vs Temperature BIAS at 2MHz vs T
10 10 24 VIN = 12V V 1.2A LOAD IN = 12V VIN = 12V VOUT = 3.3V VOUT = 3.3V VOUT = 5V L = 10µH BIAS = V 20 1.2A LOAD BIAS = V 8 8 OUT OUT FORCED CONTINUOUS MODE FORCED CONTINUOUS MODE 1A LOAD FORCED CONTINUOUS MODE 1A LOAD (CONTINUOUS OPERATION (CONTINUOUS OPERATION ABOVE MAX JUNCTION 16 ABOVE MAX JUNCTION 6 6 TEMPERATURE MAY TEMPERATURE MAY PERMANENTLY PERMANENTLY 1A LOAD (mA) (mA) DAMAGE THE (mA) 12 DAMAGE THE NO LOAD DEVICE) DEVICE) I BIAS 4 I BIAS 4 0.5A LOAD I BIAS 0.5A LOAD 8 NO LOAD 2 2 NO LOAD 4 0 0 0 0.2 0.6 1.0 1.4 1.8 2.2 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 fSW (MHz) TEMPERATURE (°C) TEMPERATURE (°C) 8619 G25 8619 G26 8619 G27 Rev A For more information www.analog.com 7 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