Datasheet LT8640S, LT8643S (Analog Devices) - 6
| Fabricante | Analog Devices |
| Descripción | 42V, 6A Synchronous Step-Down Silent Switcher 2 with 2.5µA Quiescent Current |
| Páginas / Página | 30 / 6 — Typical perForMance characTerisTics. Burst Mode Operation Efficiency. vs … |
| Formato / tamaño de archivo | PDF / 2.3 Mb |
| Idioma del documento | Inglés |
Typical perForMance characTerisTics. Burst Mode Operation Efficiency. vs Inductor Value (LT8640S). alue. Reference Voltage
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LT8640S/LT8643S
Typical perForMance characTerisTics Burst Mode Operation Efficiency vs Inductor Value (LT8640S) alue Reference Voltage EN Pin Thresholds
100 979 1.03 V 977 95 IN = 12V 1.02 975 EN RISING 1.01 90 973 1.00 85 VIN = 24V TAGE (mV) 971 0.99 80 969 EFFICIENCY (%) 0.98 967 75 EN THRESHOLD (V) REFERENCE VOL 965 0.97 EN FALLING VOUT = 5V 70 ILOAD = 10mA 963 0.96 L = IHLP3232DZ-01 65 961 0.95 1 2 3 4 5 6 7 8 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 INDUCTOR VALUE (µH) TEMPERATURE (°C) TEMPERATURE (°C) 8640S G10 8640S G11 8640S G12
LT8640S Load Regulation LT8643S Load Regulation LT8640S Line Regulation
0.15 0.40 0.12 0.10 0.30 0.10 0.08 0.20 0.06 (%) 0.05 (%) (%) 0.10 0.04 OUT OUT OUT 0 0.00 0.02 0.00 –0.10 0.05 CHANGE IN V CHANGE IN V CHANGE IN V –0.02 –0.20 –0.04 –0.10 VOUT = 5V –0.30 V V OUT = 5V –0.06 OUT = 5V VIN = 12V V I IN = 12V LOAD = 1A –0.15 –0.40 –0.08 0 1 2 3 4 5 6 0 1 2 3 4 5 6 5 10 15 20 25 30 35 40 45 LOAD CURRENT (A) LOAD CURRENT (A) INPUT VOLTAGE (V) 8640S G13 8640S G14 8640S G15
LT8643S Line Regulation LT8640S No-Load Supply Current LT8643S No-Load Supply Current
0.15 4.0 225 V 0.12 OUT = 5V 200 L = 4.7µH 3.5 0.09 IN REGULATION 175 0.06 (%) 3.0 0.03 150 OUT 0 2.5 125 –0.03 100 2.0 CHANGE IN V –0.06 INPUT CURRENT (µA) INPUT CURRENT (µA) 75 –0.09 1.5 VOUT = 3.3V V –0.12 OUT = 5V L = 4.7µH 50 ILOAD = 1A IN REGULATION –0.15 1.0 25 5 10 15 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45 5 10 15 20 25 30 35 40 45 INPUT VOLTAGE (V) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 8640S G16 8640S G17 8640S G18 8640sfa 6 For more information www.linear.com/LT8640S Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Applications Related Parts
Typical perForMance characTerisTics Burst Mode Operation Efficiency vs Inductor Value (LT8640S) alue Reference Voltage EN Pin Thresholds
100 979 1.03 V 977 95 IN = 12V 1.02 975 EN RISING 1.01 90 973 1.00 85 VIN = 24V TAGE (mV) 971 0.99 80 969 EFFICIENCY (%) 0.98 967 75 EN THRESHOLD (V) REFERENCE VOL 965 0.97 EN FALLING VOUT = 5V 70 ILOAD = 10mA 963 0.96 L = IHLP3232DZ-01 65 961 0.95 1 2 3 4 5 6 7 8 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 INDUCTOR VALUE (µH) TEMPERATURE (°C) TEMPERATURE (°C) 8640S G10 8640S G11 8640S G12
LT8640S Load Regulation LT8643S Load Regulation LT8640S Line Regulation
0.15 0.40 0.12 0.10 0.30 0.10 0.08 0.20 0.06 (%) 0.05 (%) (%) 0.10 0.04 OUT OUT OUT 0 0.00 0.02 0.00 –0.10 0.05 CHANGE IN V CHANGE IN V CHANGE IN V –0.02 –0.20 –0.04 –0.10 VOUT = 5V –0.30 V V OUT = 5V –0.06 OUT = 5V VIN = 12V V I IN = 12V LOAD = 1A –0.15 –0.40 –0.08 0 1 2 3 4 5 6 0 1 2 3 4 5 6 5 10 15 20 25 30 35 40 45 LOAD CURRENT (A) LOAD CURRENT (A) INPUT VOLTAGE (V) 8640S G13 8640S G14 8640S G15
LT8643S Line Regulation LT8640S No-Load Supply Current LT8643S No-Load Supply Current
0.15 4.0 225 V 0.12 OUT = 5V 200 L = 4.7µH 3.5 0.09 IN REGULATION 175 0.06 (%) 3.0 0.03 150 OUT 0 2.5 125 –0.03 100 2.0 CHANGE IN V –0.06 INPUT CURRENT (µA) INPUT CURRENT (µA) 75 –0.09 1.5 VOUT = 3.3V V –0.12 OUT = 5V L = 4.7µH 50 ILOAD = 1A IN REGULATION –0.15 1.0 25 5 10 15 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45 5 10 15 20 25 30 35 40 45 INPUT VOLTAGE (V) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 8640S G16 8640S G17 8640S G18 8640sfa 6 For more information www.linear.com/LT8640S Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Applications Related Parts