Datasheet LTC3374 (Analog Devices) - 9

LTC3374
TYPICAL PERFORMANCE CHARACTERISTICS 4A Buck Efficiency vs ILOAD, 4A Buck Efficiency vs ILOAD, 1A Buck Efficiency vs Frequency VOUT = 1.8V VOUT = 2.5V (Forced Continuous Mode)
100 100 100 90 90 90 VIN = 2.25V VIN = 3.3V 80 80 80 Burst Mode Burst Mode 70 OPERATION 70 OPERATION 70 VIN = 5.5V 60 60 FORCED 60 50 FORCED 50 CONTINUOUS 50 CONTINUOUS MODE 40 40 40 EFFICIENCY (%) MODE VOUT = 1.8V EFFICIENCY (%) VOUT = 2.5V EFFICIENCY (%) 30 fOSC = 2MHz 30 fOSC = 2MHz 30 L = 2.2µH L = 2.2µH 20 V 20 20 IN = 2.25V VIN = 2.7V VOUT = 1.8V 10 VIN = 3.3V 10 VIN = 3.3V 10 ILOAD = 100mA VIN = 5.5V VIN = 5.5V L = 3.3µH 0 0 0 1 10 100 1000 1 10 100 1000 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 LOAD CURRENT (mA) LOAD CURRENT (mA) FREQUENCY (MHz) 3374 G25 3374 G26 3374 G27
1A Buck Efficiency vs Frequency 1A Buck Efficiency vs ILOAD 1A Buck Regulator Load Regulation (Forced Continuous Mode) (Across Operating Frequency) (Forced Continuous Mode)
100 100 I 1.820 LOAD = 100mA fOSC = 2MHz 90 90 1.816 L = 2.2µH I 80 LOAD = 500mA 80 Burst Mode 1.812 70 ILOAD = 20mA 70 OPERATION FORCED 1.808 VIN = 5.5V CONTINUOUS 60 60 MODE 1.804 (V) VIN = 3.3V 50 50 VOUT = 1.8V 1.800 V V OUT 40 40 IN = 3.3V 1.796 V EFFICIENCY (%) EFFICIENCY (%) f IN = 2.25V OSC = 1MHz 30 30 L = 3.3µH 1.792 f 20 OSC = 2MHz V 20 1.788 OUT = 1.8V L = 2.2µH DROPOUT 10 VIN = 3.3V 10 fOSC = 3MHz 1.784 L = 3.3µH L = 1µH 0 0 1.780 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 1 10 100 1000 1 10 100 1000 FREQUENCY (MHz) LOAD CURRENT (mA) LOAD CURRENT (mA) 3374 G28 3374 G29 3374 G30
4A Buck Regulator Load Regulation 1A Buck Regulator Line Regulation (Forced Continuous Mode) (Forced Continuous Mode)
1.820 1.820 fOSC = 2MHz fOSC = 2MHz 1.816 L = 2.2µH 1.815 L = 2.2µH 1.812 1.810 1.808 VIN = 5.5V 1.804 1.805 (V) VIN = 3.3V (V) ILOAD = 100mA 1.800 1.800 V OUT V OUT I 1.796 LOAD = 500mA VIN = 2.25V 1.795 1.792 1.790 1.788 DROPOUT 1.784 1.785 1.780 1.780 1 10 100 1000 2.25 2.75 3.25 3.75 4.25 4.75 5.25 LOAD CURRENT (mA) VIN (V) 3374 G31 3374 G32 3374fc For more information www.linear.com/LTC3374 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Buck Switching Regulators Buck Regulators with Combined Power Stages Power Failure Reporting Via PGOOD_ALL Pin Temperature Monitoring and Overtemperature Protection Programming the Operating Frequency Applications Information Buck Switching Regulator Output Voltage and Feedback Network Buck Regulators Combined Buck Regulators Input and Output Decoupling Capacitor Selection PCB Considerations Package Description Revision History Typical Application Related Parts