Datasheet LTM4602 (Analog Devices) - 4

LTM4602
TYPICAL PERFORMANCE CHARACTERISTICS (See Figure 21 for all curves) Effi ciency vs Load Current Effi ciency vs Load Current Effi ciency vs Load Current with 5VIN (FCB = 0) with 12VIN (FCB = 0) with 20VIN (FCB = 0)
100 100 100 90 90 90 80 80 80 70 0.8V 70 OUT 0.8VOUT 70 1.2VOUT 1.2VOUT 60 1.5VOUT 60 1.5VOUT 60 EFFICIENCY (%) 1.8VOUT 1.8V EFFICIENCY (%) OUT EFFICIENCY (%) 50 2.5VOUT 2.5V 50 OUT 1.2VOUT 3.3V 50 OUT* 3.3VOUT 1.5VOUT *FOR 5V TO 3.3V CONVERSION, 3.3VOUT (950kHz)* 1.8V 40 OUT SEE FREQUENCY ADJUSTMENT 40 *950kHz INSTEAD OF 1.3MHz 40 2.5VOUT IN APPLICATIONS INFORMATION INCREASES 3.3V EFFICIENCY 2% 3.3VOUT 30 30 30 0 2 4 6 8 0 2 4 6 8 0 2 4 6 8 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 4602 G01 4602 G02 4602 G03
Light Load Effi ciency vs Load Current with 12VIN (FCB > 0.7V, <5V) 1.2V Transient Response 1.5V Transient Response
100 90 VOUT VOUT 50mV/DIV 50mV/DIV 80 IOUT IOUT 70 2A/DIV 2A/DIV 60 20μs/DIV 4602 G05 20μs/DIV 4602 G06 EFFICIENCY (%) 1.2V AT 3A/μs LOAD STEP 1.5V AT 3A/μs LOAD STEP 50 1.2VOUT COUT = 1 × 22μF, 6.3V CERAMICS C 1.5VOUT 330μF, 4V SANYO POSCAP OUT = 1 × 22μF, 6.3V CERAMICS 330μF, 4V SANYO POSCAP 1.8V 40 OUT 2.5VOUT 3.3VOUT 30 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 LOAD CURRENT (A) 4602 G04
1.8V Transient Response 2.5V Transient Response 3.3V Transient Response
VOUT VOUT VOUT 50mV/DIV 50mV/DIV 50mV/DIV IOUT IOUT IOUT 2A/DIV 2A/DIV 2A/DIV 20μs/DIV 4602 G07 20μs/DIV 4602 G08 20μs/DIV 4602 G09 1.8V AT 3A/μs LOAD STEP 2.5V AT 3A/μs LOAD STEP 3.3V AT 3A/μs LOAD STEP COUT = 1 × 22μF, 6.3V CERAMICS COUT = 1 × 22μF, 6.3V CERAMICS COUT = 1 × 22μF, 6.3V CERAMICS 330μF, 4V SANYO POSCAP 330μF, 4V SANYO POSCAP 330μF, 4V SANYO POSCAP 4602fa 4