Linear Technology EN55022B, Руководство пользователя

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LTM4612
6
4612fc
For more information www.linear.com/LTM4612
TYPICAL PERFORMANCE CHARACTERISTICS
Start-Up with 24V
IN
to 12V
OUT
at
I
OUT
= 5A, T
A
= –55°C
Short-Circuit with 24V
IN
to 12V
OUT
at I
OUT
= 0A
Short-Circuit with 24V
IN
to 12V
OUT
at I
OUT
= 5A
V
IN
to V
OUT
Step-Down Ratio Input Ripple Output Ripple
500µs/DIV
I
IN
1A/DIV
V
OUT
5V/DIV
4612 G10
SOFT-START CAPACITOR: 3.9nF
C
IN
= 3 × 10µF CERAMIC CAPACITORS AND
1 × 47µF OSCON CAPACITOR
50µs/DIV
I
IN
0.2A/DIV
V
OUT
5V/DIV
4612 G11
C
OUT
= 2 × 22µF CERAMIC CAPACITORS AND
2 × 47µF CERAMIC CAPACITORS
20µs/DIV
I
IN
2A/DIV
V
OUT
5V/DIV
4612 G12
C
OUT
= 2
×
22µF CERAMIC CAPACITORS AND
2
×
47µF CERAMIC CAPACITORS
3.3
24
30
18
12
6 10 4 8 12 14 15
6
0
36
4612 G13
SEE FREQUENCY ADJUSTMENT SECTION
FOR OPERATIONS OUTSIDE THIS REGION
OPERATING REGION
WITH DEFAULT FREQUENCY
V
OUT
(V)
V
IN
(V)
1µs/DIV
50mV/DIV
4612 G14
V
IN
= 24V
V
OUT
= 12V AT 5A RESISTIVE LOAD
C
IN
= 3
×
10µF 50V CERAMIC 1
×
100µF BULK
1µs/DIV
10mV/DIV
4612 G15
V
IN
= 24V
V
OUT
= 12V AT 5A RESISTIVE LOAD
C
OUT
= 2
×
22µF 16V CERAMIC AND
2
×
47µF 16V CERAMIC