Datasheet LTC3370 (Analog Devices) - 8

LTC3370
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. 1A Buck Efficiency vs ILOAD, 1A Buck Power Loss vs ILOAD, NMOS RDS(ON) vs Temperature VOUT = 1.2V VOUT = 1.2V
450 100 1000 Burst Mode OPERATION Burst Mode OPERATION VIN = 2.25V 90 900 VOUT = 1.2V 400 VIN = 3.3V f 80 800 OSC = 2MHz VIN = 5.5V L = 2.2µH 70 700 350 VIN = 2.25V 60 600 (mΩ) V 300 50 IN = 2.25V V 500 IN = 3.3V VIN = 3.3V 40 VIN = 5.5V 400 R DS(ON) 250 EFFICIENCY (%) VIN = 2.25V 30 VIN = 3.3V POWER LOSS (mW) 300 V VIN = 5.5V 20 IN = 5.5V 200 200 FORCED VOUT = 1.2V 10 CONTINUOUS fOSC = 2MHz 100 MODE L = 2.2µH 150 0 0 –55 –25 5 35 65 95 125 155 1 10 100 1000 1 10 100 1000 TEMPERATURE (°C) LOAD CURRENT (mA) LOAD CURRENT (mA) 3370 G19 3370 G20 3370 G21
1A Buck Efficiency vs ILOAD, 1A Buck Power Loss vs ILOAD, 1A Buck Efficiency vs ILOAD, VOUT = 1.8V VOUT = 1.8V VOUT = 2.5V
100 1000 100 Burst Mode OPERATION Burst Mode OPERATION 90 900 VOUT = 1.8V 90 f 80 800 OSC = 2MHz L = 2.2µH 80 Burst Mode 70 700 70 OPERATION 60 V 60 IN = 2.25V 600 VIN = 2.25V VIN = 2.7V 50 VIN = 3.3V 500 50 V V IN = 3.3V IN = 5.5V VIN = 3.3V V 40 V IN = 5.5V IN = 2.25V 400 40 EFFICIENCY (%) V V EFFICIENCY (%) IN = 2.7V 30 IN = 3.3V V V POWER LOSS (mW) 300 30 IN = 3.3V IN = 5.5V VIN = 5.5V VIN = 5.5V 20 200 20 FORCED VOUT = 1.8V FORCED VOUT = 2.5V 10 CONTINUOUS fOSC = 2MHz 100 10 CONTINUOUS fOSC = 2MHz MODE L = 2.2µH MODE L = 2.2µH 0 0 0 1 10 100 1000 1 10 100 1000 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3370 G22 3370 G23 3370 G24
1A Buck Power Loss vs ILOAD, 1A Buck Efficiency vs ILOAD, 1A Buck Power Loss vs ILOAD, VOUT = 2.5V VOUT = 3.3V VOUT = 3.3V
1000 100 1000 Burst Mode OPERATION Burst Mode OPERATION 900 VOUT = 2.5V 90 900 VOUT = 3.3V f f 800 OSC = 2MHz OSC = 2MHz L = 2.2µH 80 800 L = 2.2µH 700 70 Burst Mode 700 OPERATION 600 60 600 VIN = 4.2V 500 50 500 V VIN = 5.5V IN = 3.3V V VIN = 5.5V 400 40 IN = 4.2V 400 EFFICIENCY (%) VIN = 5.5V POWER LOSS (mW) 300 VIN = 2.7V 30 POWER LOSS (mW) 300 VIN = 4.2V 200 20 200 VIN = 5.5V FORCED VOUT = 3.3V 100 10 CONTINUOUS fOSC = 2MHz 100 MODE L = 2.2µH 0 0 0 1 10 100 1000 1 10 100 1000 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3370 G25 3370 G26 3370 G27 3370fb 8 For more information www.linear.com/LTC3370 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Block Diagram Operation Buck Switching Regulators Buck Regulators with Combined Power Stages Power Failure Reporting Via PGOODALL Pin Temperature Monitoring and Overtemperature Protection Programming the Operating Frequency Applications Information Buck Switching Regulator Output Voltage and Feedback Network Buck Regulators Combined Buck Power Stages Input and Output Decoupling Capacitor Selection PCB Considerations Typical Applications Package Description Typical Application Related Parts