Datasheet LT3383 (Analog Devices) - 7

LT3383
TYPICAL PERFORMANCE CHARACTERISTICS VIN = 3.8V, TA = 25°C unless otherwise noted Step-Down Switching Regulators 3 Step-Down Switching Regulators 3 and 4 Efficiency vs IOUT and 4 Efficiency vs IOUT
100 100 90 90 80 80 70 70 60 60 50 50 40 40 EFFICIENCY (%) EFFICIENCY (%) 30 30 20 20 10 VIN = 3.3V VIN = 5V V 10 OUT = 1.2V VOUT = 1.2V 0 0 1 10 100 1000 1 10 100 1000 IOUT (mA) IOUT (mA) 3383 G07 3383 G08
Step-Down Switching Regulators 1 and 2 Efficiency vs IOUT Buck RDS(ON) vs Temperature
100 250 VIN = 3.3V 90 80 200 VOUT = 2.5V BUCK 3, 4 PMOS 70 V 60 OUT = 1.2V 150 (mΩ) BUCK 1, 2 PMOS 50 BUCK 3, 4 NMOS 40 100 EFFICIENCY (%) R DS(ON) 30 BUCK 1, 2 NMOS 20 50 10 0 0 1 10 100 1000 –50 0 50 100 150 IOUT (mA) TEMPERATURE (°C) 3383 G09 3383 G10
Step-Down Switching Regulator Buck RDS(ON) vs VIN Current Limit vs Temperature
200 4.5 180 BUCK 3, 4 PMOS 4.0 BUCK 1, 2 160 140 3.5 120 BUCK 1, 2 PMOS (mΩ) 100 BUCK 3, 4 BUCK 3, 4 NMOS 3.0 80 R DS(ON) CURRENT (A) 60 BUCK 1, 2 NMOS 2.5 40 2.0 20 0 1.5 2.5 3.5 4.5 5.5 –50 0 50 100 150 VIN (V) TEMPERATURE (°C) 3383 G11 3383 G12 Rev. 0 For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Introduction Step-Down Switching Regulators Power On Sequencing Fault Detection and Reporting Applications Information Thermal Considerations and Board Layout Typical Applications Package Description Typical Application Related Parts