Datasheet LT8640S-2, LT8643S-2 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | 42V, 6A Synchronous Step-Down Silent Switcher with 2.5µA Quiescent Current |
| Pages / Page | 30 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Burst Mode Operation Efficiency. vs … |
| File Format / Size | PDF / 2.6 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Burst Mode Operation Efficiency. vs Inductor Value (LT8640S-2). vs Inductor Value
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LT8640S-2/LT8643S-2
TYPICAL PERFORMANCE CHARACTERISTICS Burst Mode Operation Efficiency vs Inductor Value (LT8640S-2) vs Inductor Value Reference Voltage EN Pin Thresholds
100 979 1.03 V 95 IN = 12V 977 1.02 975 EN RISING 90 1.01 973 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) 8640s2 G10 8640s2 G11 8640s2 G12
LT8640S-2 Load Regulation LT8643S-2 Load Regulation LT8640S-2 Line Regulation
0.15 0.40 0.12 0.10 0.30 0.10 0.08 0.20 0.06 (%) 0.05 (%) (%) 0.10 OUT 0.04 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 VOUT = 5V –0.04 –0.10 VOUT = 5V VIN = 12V –0.30 VIN = 12V V –0.06 OUT = 5V VSYNC = 0V VSYNC = 0V ILOAD = 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) 8640s2 G13 8640s2 G14 8640s2 G15
LT8640S-2 No-Load Supply LT8643S-2 No-Load Supply LT8643S-2 Line Regulation Current Current
0.15 4.0 225 0.12 VOUT = 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 V V OUT = 3.3V –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) 8640s2 G16 8640s2 G17 8640s2 G18 Rev 0 6 For more information www.analog.com Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION E LECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION TYPICAL APPLICATIONS RELATED PARTS
TYPICAL PERFORMANCE CHARACTERISTICS Burst Mode Operation Efficiency vs Inductor Value (LT8640S-2) vs Inductor Value Reference Voltage EN Pin Thresholds
100 979 1.03 V 95 IN = 12V 977 1.02 975 EN RISING 90 1.01 973 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) 8640s2 G10 8640s2 G11 8640s2 G12
LT8640S-2 Load Regulation LT8643S-2 Load Regulation LT8640S-2 Line Regulation
0.15 0.40 0.12 0.10 0.30 0.10 0.08 0.20 0.06 (%) 0.05 (%) (%) 0.10 OUT 0.04 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 VOUT = 5V –0.04 –0.10 VOUT = 5V VIN = 12V –0.30 VIN = 12V V –0.06 OUT = 5V VSYNC = 0V VSYNC = 0V ILOAD = 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) 8640s2 G13 8640s2 G14 8640s2 G15
LT8640S-2 No-Load Supply LT8643S-2 No-Load Supply LT8643S-2 Line Regulation Current Current
0.15 4.0 225 0.12 VOUT = 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 V V OUT = 3.3V –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) 8640s2 G16 8640s2 G17 8640s2 G18 Rev 0 6 For more information www.analog.com Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION E LECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION TYPICAL APPLICATIONS RELATED PARTS
