Datasheet LT8636, LT8637 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | 42V, 5A/7A Peak Synchronous Step-Down Silent Switcher with 2.5µA Quiescent Current |
| Pages / Page | 32 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Burst Mode Operation Efficiency. vs … |
| Revision | C |
| File Format / Size | PDF / 2.7 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Burst Mode Operation Efficiency. vs Inductor Value (. vs Inductor Value LT8636)
Model Line for this Datasheet
Text Version of Document
LT8636/LT8637
TYPICAL PERFORMANCE CHARACTERISTICS Burst Mode Operation Efficiency vs Inductor Value ( vs Inductor Value LT8636) Reference Voltage Reference V EN Pin Thresholds
100 979 1.03 V 95 IN = 12V 977 1.02 EN RISING 975 1.01 90 973 1.00 85 VIN = 24V TAGE (mV) 971 0.99 80 969 EFFICIENCY (%) 0.98 967 75 EN THRESHOLD (V) EN FALLING REFERENCE VOL 965 0.97 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 75 100 125 150 –50 –25 0 25 50 75 100 125 150 INDUCTOR VALUE (µH) TEMPERATURE (°C) TEMPERATURE (°C) 8636 G10 8636 G11 8636 G12
LT8636 Load Regulation LT8637 Load Regulation LT8636 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 V V OUT = 5V IN = 12V –0.30 V V IN = 12V –0.06 OUT = 5V VSYNC = 0V V I SYNC = 0V 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) 8636 G13 8636 G14 8636 G15
LT8637 Line Regulation LT8636 No-Load Supply Current LT8637 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) V 75 OUT = 3.3V –0.09 1.5 L = 4.7µH V –0.12 OUT = 5V BIAS = V 50 OUT 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) 8636 G16 8636 G17 8636 G18 Rev. C 6 For more information www.analog.com 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 Package Description Revision History Typical Applications Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Burst Mode Operation Efficiency vs Inductor Value ( vs Inductor Value LT8636) Reference Voltage Reference V EN Pin Thresholds
100 979 1.03 V 95 IN = 12V 977 1.02 EN RISING 975 1.01 90 973 1.00 85 VIN = 24V TAGE (mV) 971 0.99 80 969 EFFICIENCY (%) 0.98 967 75 EN THRESHOLD (V) EN FALLING REFERENCE VOL 965 0.97 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 75 100 125 150 –50 –25 0 25 50 75 100 125 150 INDUCTOR VALUE (µH) TEMPERATURE (°C) TEMPERATURE (°C) 8636 G10 8636 G11 8636 G12
LT8636 Load Regulation LT8637 Load Regulation LT8636 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 V V OUT = 5V IN = 12V –0.30 V V IN = 12V –0.06 OUT = 5V VSYNC = 0V V I SYNC = 0V 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) 8636 G13 8636 G14 8636 G15
LT8637 Line Regulation LT8636 No-Load Supply Current LT8637 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) V 75 OUT = 3.3V –0.09 1.5 L = 4.7µH V –0.12 OUT = 5V BIAS = V 50 OUT 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) 8636 G16 8636 G17 8636 G18 Rev. C 6 For more information www.analog.com 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 Package Description Revision History Typical Applications Related Parts
