Datasheet LTM4650-1 (Analog Devices) - 6

LTM4650-1
Typical perForMance characTerisTics Burst Mode and Pulse-Skip Mode Efficiency VIN=12V, VOUT = 1.2V, 1V Dual Phase Single Output 1.2V Dual Phase Single Output fS = 500kHz Load Transient Response Load Transient Response
100 CCM V 90 Burst Mode OPERATION OUT(AC) V 20mV/DIV PULSE-SKIP MODE OUT(AC) 80 20mV/DIV 70 60 LOAD 50 LOAD STEP STEP 10A/DIV 40 10A/DIV EFFICIENCY (%) 46501 G06 30 46501 G05 50µs/DIV 50µs/DIV 12V 20 12VIN, 1VOUT, 500kHz, 12.5A LOAD STEP, IN, 1.2VOUT, 500kHz, 12.5A LOAD STEP, 10A/µs STEP-UP AND STEP-DOWN 10A/µs STEP-UP AND STEP-DOWN 10 C C OUT = 6× 220µF CERAMIC OUT = 6× 220µF CERAMIC CFF = 68pF 0 CFF = 68pF 0.01 0.1 1 10 LOAD CURRENT (A) 46501 G04
1.5V Dual Phase Single Output 1.8V Dual Phase Single Output Load Transient Response Load Transient Response Single Phase Start-Up with No load
V V SW V OUT(AC) OUT(AC) 10V/Div 20mV/DIV 20mV/DIV VOUT 0.5V/Div LOAD LOAD STEP STEP IIN 10A/DIV 10A/DIV 0.2A/Div 46501 G07 46501 G08 46501 G09 50µs/DIV 50µs/DIV 20ms/DIV 12VIN, 1.5VOUT, 600kHz, 12.5A LOAD STEP, 12VIN, 1.8VOUT, 600kHz, 12.5A LOAD STEP, 12VIN, 1.2VOUT, 500kHz 10A/µs STEP-UP AND STEP-DOWN 10A/µs STEP-UP AND STEP-DOWN COUT = 1× 470µF POSCAP + 2× 100µF COUT = 6× 220µF CERAMIC COUT = 6× 220µF CERAMIC CERAMIC, CSS = 0.1µF CFF = 68pF CFF = 68pF
Single Phase Short Circuit Single Phase Short Circuit Single Phase Start-up with 25A Protection with No load Protection with 25A
VSW VSW VSW 10V/Div 10V/Div 10V/Div V V OUT OUT VOUT 0.5V/Div 0.5V/Div 0.5V/Div IIN 1A/Div IIN IIN 1A/Div 2A/Div 46501 G10 46501 G11 46501 G12 50μs/DIV 20ms/DIV 50µs/DIV 12VIN, 1.2VOUT, 500kHz 12VIN, 1.2VOUT, 500kHz 12VIN, 1.2VOUT, 500kHz COUT = 1× 470µF POSCAP + 2× 100µF COUT = 1× 470µF POSCAP + 2× 100µF COUT = 1× 470µF POSCAP + 2× 100µF CERAMIC, CSS = 0.1µF CERAMIC, CSS = 0.1μF CERAMIC 46501fc 6 For more information www.linear.com/LTM4650-1 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 Applications Package Description Revision History Package Photo Design Resources Related Parts