Datasheet LT8652S (Analog Devices) - 5

LT8652S
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. 5.0VIN to 1.2VOUT Efficiency 12.0VIN to 3.3VOUT Efficiency
100 6.0 100 6.0 L = XEL4030 1MHz, L = 0.47µH L = XEL5030 95 5.5 FCM 1.5MHz, L = 0.3µH 5.5 95 BIAS = VOUT 90 2MHz, L = 0.2µH 5.0 FCM 5.0 85 4.5 EFFICIENCY 90 EFFICIENCY 4.5 POWER LOSS (W) POWER LOSS (W) 80 4.0 4.0 85 75 3.5 3.5 70 3.0 80 3.0 65 2.5 2.5 EFFICIENCY (%) 75 60 2.0 EFFICIENCY (%) 2.0 55 1.5 POWER LOSS POWER LOSS 70 1.5 50 1.0 1MHz, L = 1.2µH 1.0 65 45 0.5 1.5MHz, L = 1µH 0.5 2MHz, L = 0.6µH 40 0 60 0 0 2 4 6 8 10 12 0 2 4 6 8 10 12 LOAD CURRENT (A) LOAD CURRENT (A) 8652S G05 8652S G06
Efficiency at Different fSW Efficiency vs fSW Reference Voltage
100 100 0.606 12VIN TO 1VOUT 12VIN TO 1VOUT 95 BIAS = 5V 95 4A LOAD L = XEL4030 BIAS = 5V 0.604 90 90 L = XEL4030-301ME 0.602 85 85 TAGE (V) 80 80 0.600 75 EFFICIENCY (%) 75 EFFICIENCY (%) 0.598 2.5MHz, 0.3µH 70 2MHz, 0.3µH 70 REFERENCE VOL 1.5MHz, 0.3µH 0.596 65 1MHz, 0.3µH 65 0.5MHz, 0.64µH 60 60 0.594 0 2 4 6 8 10 12 0.5 1 1.5 2 2.5 –55 –25 5 35 65 95 125 155 LOAD CURRENT (A) SWITCHING FREQUENCY (MHZ) TEMPERATURE (°C) 8652S G07 8652S G08 8652S G09
No Load Supply Current with Load Regulation Line Regulation Internal Compensation
0.25 0.50 28 V V V 0.20 IN1 = VIN2 = 12V IN1 = VIN2 IN1 = VIN2 V 0.40 OUT1 = VOUT2 = 1V V I OUT1 = 3.3V, VOUT2 = 1.0V 24 0.15 FCM, fSW = 1.5MHz OUT = 3A 0.30 IN REGULATION BIAS = 5V SYNC = 0V 0.10 0.20 20 (%) (%) 0.05 0.10 OUT OUT 16 0.00 0.00 –0.05 –0.10 12 CHANGE IN V –0.10 CHANGE IN V –0.20 INPUT CURRENT (µA) 8 –0.15 –0.30 4 –0.20 CH1 CH1 –0.40 BIAS = FLOAT CH2 CH2 BIAS = VOUT1 –0.25 –0.50 0 0 2 4 6 8 10 12 2 4 6 8 10 12 14 16 18 6 8 10 12 14 16 18 OUTPUT CURRENT (A) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 8652S G10 LT8652 G11 8652S G12 Rev. A For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts