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Linear Technology LTM4624Y Demo Board, 14V, 4A Step-Down µModule Regulator DC1889A DC1889A Fiche De Données

Codes de produits
DC1889A
Télécharger
Page de 26
LTM4624
5
4624fb
For more information 
www.linear.com/LTM4624
Start-Up with No Load
Short-Circuit with No Load
Start-Up with 4A Load
Short-Circuit with 4A Load
Output Ripple
Recovery to No Load 
from Short Circuit
Start Into Pre-Bias Output
12V Input to 1.8V Output,  
50% Load Transient Response
5V Input to 1.2V Output,  
50% Load Transient Response
TYPICAL PERFORMANCE CHARACTERISTICS
I
IN
0.1A/DIV
V
OUT
0.5V/DIV
V
IN
 = 12V
V
OUT
 = 1.5V
INPUT CAPACITOR = 150µF SANYO ELECTROLYTIC 
CAPACITOR (OPTIONAL) + 22µF CERAMIC CAPACITOR
OUTPUT CAPACITOR = 47µF CERAMIC CAPACITOR
SOFT-START CAPACITOR = 0.1µF
5ms/DIV
4624 G09
I
IN
0.2A/DIV
V
OUT
0.5V/DIV
V
IN
 = 12V
V
OUT
 = 1.5V
INPUT CAPACITOR = 150µF SANYO ELECTROLYTIC
CAPACITOR (OPTIONAL) + 22µF CERAMIC CAPACITOR
OUTPUT CAPACITOR = 47µF CERAMIC CAPACITOR
SOFT-START CAPACITOR = 0.1µF
5ms/DIV
4624 G10
I
IN
0.5A/DIV
V
OUT
0.5V/DIV
V
IN
 = 12V
V
OUT
 = 1.5V
INPUT CAPACITOR = 150µF SANYO ELECTROLYTIC
CAPACITOR (OPTIONAL) + 22µF CERAMIC CAPACITOR
OUTPUT CAPACITOR = 47µF CERAMIC CAPACITOR
20µs/DIV
4624 G11
I
IN
0.5A/DIV
V
OUT
0.5V/DIV
V
IN
 = 12V
V
OUT
 = 1.5V
INPUT CAPACITOR = 150µF SANYO ELECTROLYTIC
CAPACITOR (OPTIONAL) + 22µF CERAMIC CAPACITOR
OUTPUT CAPACITOR = 47µF CERAMIC CAPACITOR
20µs/DIV
4624 G12
I
OUT
20A/DIV
V
OUT
200mV/DIV
V
IN
 = 12V
V
OUT
 = 1V
INPUT CAPACITOR = 22µF SANYO ELECTROLYTIC
CAPACITOR (OPTIONAL) + 2
× 22µF CERAMIC CAPACITOR
OUTPUT CAPACITOR = 2
× 47µF CERAMIC CAPACITOR
SOFT-START CAPACITOR = 0.1µF
5µs/DIV
4624 G13
5mV/DIV
AC-COUPLED
V
IN
 = 12V
V
OUT
 = 1.5V
INPUT CAPACITOR = 22µF SANYO ELECTROLYTIC
CAPACITOR (OPTIONAL) + 2
× 22µF CERAMIC 
CAPACITOR
OUTPUT CAPACITOR = 2
× 47µF CERAMIC 
CAPACITOR
SOFT-START CAPACITOR = 0.1µF
500µs/DIV
4624 G14
V
IN
2V/DIV
V
OUT
1V/DIV
V
IN
 = 12V
V
OUT
 = 5V
INPUT CAPACITOR = 22µF SANYO ELECTROLYTIC
CAPACITOR (OPTIONAL) + 2
× 22µF CERAMIC CAPACITOR
OUTPUT CAPACITOR = 2
× 47µF CERAMIC CAPACITOR
SOFT-START CAPACITOR = 0.1µF
1µs/DIV
4624 G15
V
OUT
100mV/DIV
AC-COUPLED
LOAD STEP
2A/DIV
V
IN
 = 12V
V
OUT
 = 1.8V
I
OUT
 = 2A TO 4A, 1A/µs
OUTPUT CAPACITOR = 1
× 47µF CERAMIC
50µs/DIV
4624 G16
V
OUT
50mV/DIV
AC-COUPLED
LOAD STEP
1A/DIV
V
IN
 = 5V
V
OUT
 = 1.2V
I
OUT
 = 2A TO 4A, 1A/µs
OUTPUT CAPACITOR = 1
× 47µF CERAMIC
50µs/DIV
4624 G17