Datasheet LT8640S-2, LT8643S-2 (Analog Devices) - 6

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