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LTM4644MPY Datasheet(PDF) 5 Page - Linear Technology |
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LTM4644MPY Datasheet(HTML) 5 Page - Linear Technology |
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5 / 36 page  LTM4644/LTM4644-1 5 4644fe For more information www.linear.com/LTM4644 TYPICAL PERFORMANCE CHARACTERISTICS 3.3V Output Transient Response 5V Output Transient Response Start-Up with No Load Start-Up with 4A Load Short-Circuit with No Load Short-Circuit with 4A Load 20µs/DIV LOAD STEP 1A/DIV 4644 G08 VOUT 50mV/DIV AC-COUPLED VIN = 12V, VOUT = 5V, IOUT = 3A TO 4A, 1A/µs OUTPUT CAPACITOR = 47µF CERAMIC 5ms/DIV 4644 G09 IIN 0.1A/DIV VOUT 0.5V/DIV VIN = 12V, VOUT = 1.5V INPUT CAPACITOR = 150µF SANYO ELECTROLYTIC CAPACITOR (OPTIONAL) + 22µF CERAMIC CAPACITOR OUTPUT CAPACITOR = 47µF CERAMIC CAPACITOR SOFT-START CAPACITOR = 0.1µF 5ms/DIV 4644 G10 IIN 0.2A/DIV VOUT 0.5V/DIV VIN = 12V, VOUT = 1.5V INPUT CAPACITOR = 150µF SANYO ELECTROLYTIC CAPACITOR (OPTIONAL) + 22µF CERAMIC CAPACITOR OUTPUT CAPACITOR = 47µF CERAMIC CAPACITOR SOFT-START CAPACITOR = 0.1µF 20µs/DIV 4644 G11 IIN 0.5A/DIV VOUT 0.5V/DIV VIN = 12V, VOUT = 1.5V INPUT CAPACITOR = 150µF SANYO ELECTROLYTIC CAPACITOR (OPTIONAL) + 22µF CERAMIC CAPACITOR OUTPUT CAPACITOR = 47µF CERAMIC CAPACITOR 20µs/DIV 4644 G12 IIN 0.5A/DIV VOUT 0.5V/DIV VIN = 12V, VOUT = 1.5V INPUT CAPACITOR = 150µF SANYO ELECTROLYTIC CAPACITOR (OPTIONAL) + 22µF CERAMIC CAPACITOR OUTPUT CAPACITOR = 47µF CERAMIC CAPACITOR 20µs/DIV LOAD STEP 1A/DIV 4644 G07 VOUT 50mV/DIV AC-COUPLED VIN = 12V, VOUT = 3.3V, IOUT = 3A TO 4A, 1A/µs OUTPUT CAPACITOR = 47µF CERAMIC Recovery to No Load from Short-Circuit Output Ripple Start Into Pre-Biased Output IOUT 20A/DIV VOUT 200mV/DIV VIN = 12V VOUT = 1V INPUT CAPACITOR = 22µF SANYO ELECTROLYTIC CAPACITOR (OPTIONAL) + 2× 22µF CERAMIC CAP. OUTPUT CAPACITOR = 2× 47µF CERAMIC CAP. SOFT-START CAPACITOR = 0.1µF 5µs/DIV 4644 G13 5mV/DIV AC-COUPLED VIN = 12V VOUT = 1.5V INPUT CAPACITOR = 22µF SANYO ELECTROLYTIC CAPACITOR (OPTIONAL) + 2× 22µF CERAMIC CAP. OUTPUT CAPACITOR = 2× 47µF CERAMIC CAP. SOFT-START CAPACITOR = 0.1µF 20MHz MEASUREMENT BANDWIDTH 500µs/DIV 4644 G14 VIN 2V/DIV VOUT 1V/DIV VIN = 12V VOUT = 5V INPUT CAPACITOR = 22µF SANYO ELECTROLYTIC CAPACITOR (OPTIONAL) + 2× 22µF CERAMIC CAP. OUTPUT CAPACITOR = 2× 47µF CERAMIC CAP. SOFT-START CAPACITOR = 0.1µF 1µs/DIV 4644 G15 |
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