LTM4608A Datasheet, PDF (6/24 Pages) Linear Technology – Low VIN, 8A DC/DC μModule with Tracking, Margining, and Frequency Synchronization

LTM4608A
TYPICAL PERFORMANCE CHARACTERISTICS
Load Transient Response
Load Transient Response
Load Transient Response
I_LOAD
2A/DIV
V_OUT
20mV/DIV
AC COUPLED
I_LOAD
2A/DIV
V_OUT
20mV/DIV
AC COUPLED
I_LOAD
2A/DIV
V_OUT
20mV/DIV
AC COUPLED
V_IN = 5V
20μs/DIV
V_OUT = 1.8V, R_FB = 4.87k
2.5A/μs STEP
4608A G10
C_OUT = 100μF X5R
C1 = NONE, C3 = NONE FROM FIGURE 18
V_IN = 5V
20μs/DIV
V_OUT = 1.5V, R_FB = 6.65k
2.5A/μs STEP
4608A G11
C_OUT = 100μF X5R
C1 = NONE, C3 = NONE FROM FIGURE 18
V_IN = 5V
20μs/DIV
V_OUT = 1.2V, R_FB = 10k
2.5A/μs STEP
4608A G12
C_OUT = 2 × 100μF
C1 = 100pF, C3 = NONE FROM FIGURE 18
Start-Up
V_OUT
0.5V/DIV
V_IN
2V/DIV
V_IN = 5V
50μs/DIV
V_OUT = 1.5V
C_OUT = 100μF NO LOAD AND 8A LOAD
(DEFAULT 100μs SOFT-START)
4608A G13
2.5V Output Current
3.0
2.5
2.0
1.5
1.0
0.5
0
0
5
10
15
20
OUTPUT CURRENT (A)
4608A G16
V_FB vs Temperature
602
600
V_IN = 5.5V
598
V_IN = 3.3V
596
V_IN = 2.7V
594
592
590
–55 –25 5
35 65 95 125
TEMPERATURE (°C)
4608A G14
Short-Circuit Protection
(2.5V Short, No Load)
2V/DIV
2V/DIV
V_IN
V_OUT
5A/DIV
I_OUT
Load Regulation vs Current
0
–0.1
–0.2
–0.3
–0.4
–0.5
FC MODE
V_IN = 3.3V
V_OUT = 1.5V
–0.6
0
2
4
6
LOAD CURRENT (A)
Short-Circuit Protection
(2.5V Short, 4A Load)
8
4608A G15
5V/DIV
5V/DIV
V_IN
V_OUT
5A/DIV
5A/DIV
I_OUT LOAD
I_OUT SHORT
V_IN = 5V
V_OUT = 2.5V
50μs/DIV
4608A G17
V_IN = 5V
V_OUT = 2.5V
50μs/DIV
4608A G18
4608afa
6