Datasheet LTM4600 (Analog Devices) - 5

LTM4600
Typical perForMance characTerisTics (See Figure 18 for all curves) Efficiency vs Load Current Efficiency vs Load Current Efficiency vs Load Current with 5VIN (FCB = 0) with 12VIN (FCB = 0) with 18VIN (FCB = 0)
100 100 100 90 90 90 80 80 80 70 70 70 60 60 60 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 50 50 0.6VOUT 50 0.6VOUT 1.2VOUT 1.5VOUT 1.2VOUT 1.5V 1.8V 40 40 OUT OUT 1.5V 40 OUT 2.5VOUT 2.5VOUT 2.5VOUT 3.3VOUT 3.3VOUT 30 30 30 0 2 4 6 8 10 0 2 4 6 8 10 0 2 4 6 8 10 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 4600 G01 4600 G02 4600 G03
Efficiency vs Load Current with Different FCB Settings 1.2V Transient Response 1.5V Transient Response
90 80 FCB > 0.7V V 70 OUT = 50mV/DIV 60 FCB = GND 50 IOUT = 5A/DIV EFFICIENCY (%) 40 30 V 25µs/DIV 4600 G05 25µs/DIV 4600 G06 IN = 12V VOUT = 1.5V 1.2V AT 5A/µs LOAD STEP 1.5V AT 5A/µs LOAD STEP 20 COUT = 3 • 22µF 6.3V CERAMICS COUT = 3 • 22µF 6.3V CERAMICS 0.1 1 10 470µF 4V SANYO POSCAP 470µF 4V SANYO POSCAP LOAD CURRENT (A) C3 = 100pF C3 = 100pF 4600 G04
1.8V Transient Response 2.5V Transient Response 3.3V Transient Response
25µs/DIV 4600 G07 25µs/DIV 4600 G08 25µs/DIV 4600 G09 1.8V AT 5A/µs LOAD STEP 2.5V AT 5A/µs LOAD STEP 3.3V AT 5A/µs LOAD STEP COUT = 3 • 22µF 6.3V CERAMICS COUT = 3 • 22µF 6.3V CERAMICS COUT = 3 • 22µF 6.3V CERAMICS 470µF 4V SANYO POSCAP 470µF 4V SANYO POSCAP 470µF 4V SANYO POSCAP C3 = 100pF C3 = 100pF C3 = 100pF 4600fd For more information www.linear.com/LTM4600 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Application Package Description Revision History Typical Application Related Parts