Datasheet LTM4668 (Analog Devices) - 4

LTM4668
TYPICAL PERFORMANCE CHARACTERISTICS Burst Mode Operation and Pulse Skip Mode Efficiency, VIN = 12V, Efficiency vs Load Current at 5VIN Efficiency vs Load Current at 12VIN VOUT = 1.5V, fS = 1MHz
90 90 90 Burst Mode OPERATION 87 87 81 CCM PULSE-SKIP MODE 84 84 72 81 81 63 78 78 54 75 75 45 72 72 36 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 69 69 27 1.0VOUT 1.0VOUT 66 1.2VOUT 66 1.2VOUT 18 63 1.5VOUT 63 1.5VOUT 9 1.8VOUT 1.8VOUT 60 60 0 0 0.3 0.6 0.9 1.2 0 0.3 0.6 0.9 1.2 0.001 0.01 0.1 1 2 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 4668 G01 4668 G02 4668 G03
1V Output Transient Response 1.2V Output Transient Response
VOUT VOUT 50mV/DIV 50mV/DIV AC-COUPLED AC-COUPLED LOAD STEP LOAD STEP CURRENT CURRENT 0.2A/DIV 0.2A/DIV 4668 G04 4668 G05 50µs/DIV 50µs/DIV 12VIN, 1VOUT, 1MHz 12VIN, 1.2VOUT, 1MHz COUT = 47µF CERAMIC, CFF = 150pF COUT = 47µF CERAMIC, CFF = 150pF 0.4A LOAD STEP, 10A/µs 0.4A LOAD STEP, 10A/µs
1.5V Output Transient Response 1.8V Output Transient Response
VOUT VOUT 50mV/DIV 50mV/DIV AC-COUPLED AC-COUPLED LOAD STEP LOAD STEP CURRENT CURRENT 0.2A/DIV 0.2A/DIV 4668 G06 4668 G07 50µs/DIV 50µs/DIV 12VIN, 1.5VOUT, 1MHz 12VIN, 1.8VOUT, 1MHz COUT = 47µF CERAMIC, CFF = 150pF COUT = 47µF CERAMIC, CFF = 150pF 0.4A LOAD STEP, 10A/µs 0.4A LOAD STEP, 10A/µs Rev. A 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Package Description Revision History Package Photo Design Resources Related Parts