Datasheet LTC3374A (Analog Devices) - 7

LTC3374A
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. 1A Buck Efficiency vs ILOAD, PMOS R V DS(ON) vs Temperature NMOS RDS(ON) vs Temperature OUT = 1.2V
450 250 100 IPMOS = 100mA INMOS = 100mA 90 400 225 80 200 70 Burst Mode 350 OPERATION L = 2.2µH 60 175 L DCR = 21mΩ 300 50 fOSC = 2MHz ANCE (mΩ) ANCE (mΩ) 150 V 40 IN = 2.25V EFFICIENCY (%) VIN = 3.3V 250 RESIST RESIST 30 VIN = 5.5V 125 VIN = 2.25V 20 V 200 V V IN = 3.3V IN = 2.25V IN = 2.25V 100 V VIN = 3.3V VIN = 3.3V 10 IN = 5.5V V V FORCED CONTINUOUS MODE IN = 5.5V IN = 5.5V 150 75 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 1m 10m 100m 1 TEMPERATURE (°C) TEMPERATURE (°C) LOAD CURRENT (A) 3374A G20 3374A G18 3374A G19
1A Buck Efficiency vs ILOAD, 1A Buck Efficiency vs ILOAD, 1A Buck Efficiency vs ILOAD, VOUT = 1.8V VOUT = 2.5V VOUT = 3.3V
100 100 100 90 90 90 80 80 Burst Mode 80 70 Burst Mode 70 OPERATION 70 Burst Mode OPERATION L = 2.2µH 60 L = 2.2µH 60 60 OPERATION L DCR = 21mΩ L DCR = 21mΩ 50 fOSC = 2MHz 50 fOSC = 2MHz 50 L = 2.2µH V L DCR = 21mΩ 40 IN = 2.5V V 40 IN = 2.8V 40 f EFFICIENCY (%) V OSC = 2MHz IN = 3.3V EFFICIENCY (%) VIN = 3.3V EFFICIENCY (%) 30 VIN = 5.5V 30 VIN = 5.5V 30 VIN = 4.2V VIN = 2.5V V V 20 IN = 2.8V IN = 5.5V V 20 20 IN = 3.3V VIN = 3.3V VIN = 4.2V V 10 IN = 5.5V V 10 IN = 5.5V V 10 IN = 5.5V FORCED CONTINUOUS MODE FORCED CONTINUOUS MODE FORCED CONTINUOUS MODE 0 0 0 1m 10m 100m 1 1m 10m 100m 1 1m 10m 100m 1 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 3374A G21 3374A G22 3374A G23
2A Buck Efficiency vs ILOAD, 2A Buck Efficiency vs ILOAD, 2A Buck Efficiency vs ILOAD, VOUT = 1.2V VOUT = 1.8V VOUT = 2.5V
100 100 100 90 90 90 80 80 80 Burst Mode 70 70 70 Burst Mode Burst Mode OPERATION L = 1.0µH 60 OPERATION OPERATION L = 1.0µH 60 60 L = 1.0µH L DCR = 13mΩ L DCR = 13mΩ L DCR = 13mΩ 50 fOSC = 2MHz 50 f 50 f OSC = 2MHz OSC = 2MHz V 40 IN = 2.25V V V 40 IN = 2.5V 40 IN = 2.8V EFFICIENCY (%) VIN = 3.3V EFFICIENCY (%) VIN = 3.3V EFFICIENCY (%) VIN = 3.3V 30 VIN = 5.5V 30 V 30 V IN = 5.5V IN = 5.5V VIN = 2.25V V V 20 IN = 2.5V IN = 2.8V V 20 20 IN = 3.3V V V IN = 3.3V IN = 3.3V V 10 IN = 5.5V V V 10 IN = 5.5V 10 IN = 5.5V FORCED CONTINUOUS MODE FORCED CONTINUOUS MODE FORCED CONTINUOUS MODE 0 0 0 1m 10m 100m 1 2 1m 10m 100m 1 2 1m 10m 100m 1 2 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 3374A G24 3374A G26 3374A G25 3374af For more information www.linear.com/LTC3374A 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information (http://www.linear.com/product/LTC3374A#orderinfo) 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 Input and Output Decoupling Capacitor Selection Combined Buck Regulators Buck Regulators PCB Considerations Package Description Typical Application Related Parts