Datasheet LT8653S (Analog Devices) - 4

LT8653S
TYPICAL PERFORMANCE CHARACTERISTICS 5VOUT Efficiency 5VOUT Efficiency 3.3VOUT Efficiency
100 100 100 95 90 95 90 90 80 85 85 70 80 80 75 60 75 70 50 70 65 40 65 EFFICIENCY (%) 60 EFFICIENCY (%) EFFICIENCY (%) 60 30 55 55 20 50 L = XFL4020-222, 2.2µH 50 L = XFL4020-222ME, 2.2µH 12V 45 12V 10 fSW = 2MHz, L = XFL4020-222ME, 2.2µH 12V f 45 SW = 2MHz, FCM 24V Burst Mode OPERATION 24V fSW = 2MHz, FCM 24V 40 0 40 0 0.5 1 1.5 2 2.5 3 0.1 1 10 100 1k 10k 0 0.5 1 1.5 2 2.5 3 LOAD CURRENT (A) LOAD CURRENT (mA) LOAD CURRENT (A) 8653S G01 8653S G02 8653S G03
3.3VOUT Efficiency Efficiency at Different fSW Efficiency vs fSW
100 100 100 12VIN 90 3.3VOUT 95 95 80 70 90 90 60 50 85 85 40 EFFICIENCY (%) EFFICIENCY (%) 80 EFFICIENCY (%) 80 30 20 0.5MHz, XEL4030 4.7µH 12VIN L = XFL4020-222, 2.2µH 75 1MHz, XFL4020 2.2µH 75 3.3VOUT 10 fSW = 2MHz, 12V 2MHz, XFL4020 2.2µH 0.9A LOAD Burst Mode OPERATION 24V 3MHz, XFL4020 2.2µH L = XFL4020, 2.2µH 0 70 70 0.1 1 10 100 1k 10k 0.5 1 1.5 2 2.5 3 0.5 1 1.5 2 2.5 3 LOAD CURRENT (mA) LOAD CURRENT (A) SWITCHING FREQUENCY (MHZ) 8653S G04 8653S G05 8653S G06
Load Regulation Line Regulation 0.8V Reference Voltage
0.40 0.4 0.810 VIN = 12V IOUT = 0.5A 0.30 VOUT1 = 5V, VOUT2 = 3.3V FCM, f 0.3 SW = 2MHz 0.808 FCM, fSW = 2MHz 0.806 0.20 0.2 0.804 (%) 0.10 (%) 0.1 OUT OUT TAGE (V) 0.802 0.00 0.0 0.800 –0.10 –0.1 0.798 CHANGE IN V CHANGE IN V 0.796 –0.20 –0.2 REFERENCE VOL 0.794 –0.30 CH1 –0.3 CH1 0.792 CH2 CH2 –0.40 –0.4 0.790 0 0.5 1 1.5 2 2.5 3 0 5 10 15 20 25 30 35 40 45 –55 –25 5 35 65 95 125 155 OUTPUT CURRENT (A) INPUT VOLTAGE (V) TEMPERATURE (°C) 8653S G07 8653S G08 8653S G09 Rev. 0 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts