Datasheet LTC3620 (Analog Devices) - 6

LTC3620
TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency vs Load Current, NFET RDS(ON) vs Temperature Effi ciency vs Load Current, VOUT FMIN/MODE Frequency
1.5 100 100 ISW = 35mA 1.4 90 90 1.3 80 80 1.2 70 70 1.1 60 60 (Ω) VIN = 3.6V 1.0 50 50 DS(ON)R 0.9 40 40 T V T A = 25°C IN = 5V EFFICIENCY (%) A = 25°C EFFICIENCY (%) 0.8 30 V V IN = 3V 30 IN = 3V FMIN/MODE = 0V VOUT = 1.1V 0.7 20 V 20 OUT = 1.1V FMIN = 20kHz 0.6 10 VOUT = 1.8V 10 FMIN = 100kHz VOUT = 2.5V FMIN = 200kHz 0.5 0 0 –50 0 50 100 130 0.1 1 10 0.1 1 10 TEMPERATURE (°C) LOAD CURRENT (mA) LOAD CURRENT (mA) 3620 G20 3620 G19 3620 G21
Effi ciency vs Load Current, VIN Effi ciency vs fMIN, 1mA Load Internal fMIN vs Temperature
100 81 55 90 80 54 80 79 53 70 78 52 60 77 (kHz) 51 VIN = 3.6V MIN 50 76 50 40 75 49 VIN = 5V T EFFICIENCY (%) A = 25°C EFFICIENCY (%) 30 VOUT = 1.1V 74 INTERNAL f 48 FMIN/MODE = VIN 20 73 TA = 25°C 47 VIN = 3V VIN = 3.6V 10 VIN = 3.6V 72 VOUT = 1.1V 46 VIN = 5.5V FMIN/MODE = EXTERNAL CLOCK 0 71 45 0.1 1 10 0 100 200 300 –50 0 50 100 LOAD CURRENT (mA) fMIN (kHz) TEMPERATURE (°C) 3620 G22 3620 G23 3620 G24
Spectral Content, 500μA Load Spectral Content, 5mA Load
–60 –40 52.5kHz –80 –60 –81.4dBm –100 355.6kHz –80 TIO (dBm) TIO (dBm) –80.2dBm –120 –100 POWER RA POWER RA –140 –120 12.5kHz 92.5kHz 1kHz 400kHz –160 –140 8kHz/DIV 3620 G25 VOUT = 1.1V 39.9kHz/DIV 3620 G26 VOUT = 1.1V VIN = 3.6V VIN = 3.6V FMIN/MODE = 0V FMIN/MODE = 0V TA = 25°C TA = 25°C 3620fa 6 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATIONS RELATED PARTS