ltm4608a Linear Technology Corporation, ltm4608a Datasheet - Page 6

• Manufacturer Part Number: ltm4608a
• Description: Low Vin, 8a Dc/dc ?module With Tracking, Margining, And Frequency Synchronization
• Manufacturer: Linear Technology Corporation

AC COUPLED
LTM4608A
TYPICAL PERFORMANCE CHARACTERISTICS
6
20mV/DIV
0.5V/DIV
2V/DIV
2A/DIV
I
V
V
LOAD
3.0
2.5
2.0
1.5
1.0
0.5
OUT
OUT
V
0
IN
0
Load Transient Response
Start-Up
2.5V Output Current
V
V
C
(DEFAULT 100μs SOFT-START)
V
V
2.5A/μs STEP
C
C1 = NONE, C3 = NONE FROM FIGURE 18
IN
OUT
OUT
IN
OUT
OUT
= 5V
= 5V
= 1.8V, R
= 100μF X5R
= 1.5V
= 100μF NO LOAD AND 8A LOAD
5
OUTPUT CURRENT (A)
FB
= 4.87k
50μs/DIV
20μs/DIV
10
15
4608A G16
4608A G13
4608A G10
20
AC COUPLED
20mV/DIV
2V/DIV
2V/DIV
5A/DIV
2A/DIV
I
V
LOAD
602
600
598
596
594
592
590
OUT
–55
V
Short-Circuit Protection
(2.5V Short, No Load)
Load Transient Response
V
V
V
V
2.5A/μs STEP
C
C1 = NONE, C3 = NONE FROM FIGURE 18
IN
OUT
IN
OUT
OUT
FB
= 5V
= 5V
vs Temperature
= 2.5V
= 1.5V, R
= 100μF X5R
–25
V
V
I
OUT
IN
OUT
TEMPERATURE (°C)
FB
5
= 6.65k
50μs/DIV
20μs/DIV
35
V
IN
= 5.5V
V
65
V
IN
IN
= 2.4V
= 3.3V
95
4608A G14
4608A G11
4608A G17
125
AC COUPLED
20mV/DIV
5V/DIV
5V/DIV
5A/DIV
5A/DIV
2A/DIV
I
V
–0.1
–0.2
–0.3
–0.5
–0.6
LOAD
–0.4
OUT
0
Load Transient Response
Load Regulation vs Current
0
Short-Circuit Protection
(2.5V Short, 4A Load)
V
V
V
V
2.5A/μs STEP
C
C1 = 100pF , C3 = NONE FROM FIGURE 18
IN
OUT
IN
OUT
OUT
FC MODE
V
V
IN
OUT
= 5V
= 5V
V
V
= 3.3V
IN
OUT
= 2.5V
= 1.2V, R
= 2 × 100μF
= 1.5V
2
LOAD CURRENT (A)
FB
= 10k
50μs/DIV
20μs/DIV
4
I
OUT
I
6
OUT
SHORT
LOAD
4608af
4608A G18
4608A G12
4608A G15
8