LTM4608 LINER [Linear Technology], LTM4608 Datasheet - Page 5

• Manufacturer Part Number: LTM4608
• Description: Low VIN, 8A DC/DC ?ModuleTM with Tracking, Margining, and Frequency Synchronization
• Manufacturer: LINER [Linear Technology]

TYPICAL PERFORMANCE CHARACTERISTICS
100
100
1.6
1.4
1.2
0.8
0.6
0.4
0.2
90
80
70
60
50
40
95
90
85
80
75
70
1
0
2.5
0
0
Effi ciency vs Load Current
Burst Mode Effi ciency with
5V Input
Supply Current vs V
CONTINUOUS MODE
0.1
0.2
3
V
2
0.3
O
V
INPUT VOLTAGE (V)
LOAD CURRENT (A)
O
= 1.2V PULSE-SKIPPING MODE
3.5
LOAD CURRENT
0.4
= 1.2V BURST MODE
5V
5V
5V
5V
5V
IN
IN
IN
IN
IN
0.5
1.2V
1.5V
1.8V
2.5V
3.3V
4
4
0.6
OUT
OUT
OUT
OUT
OUT
IN
0.7
4.5
0.8
V
V
V
6
OUT
OUT
OUT
0.9
5
= 1.5V
= 2.5V
= 3.3V
1.0
4608 G01
4608 G04
4608 G07
1.1
5.5
8
20mV/DIV
1A/DIV
100
3.5
3.0
2.0
1.5
1.0
4.0
2.5
0.5
95
90
85
80
75
70
0
0
0
V
Effi ciency vs Load Current
CONTINUOUS MODE
Load Transient Response
V
V
2A/μs STEP
C
C1 = 100pF , C3 = 22pF FROM FIGURE 18
IN
IN
OUT
OUT
to V
= 5V
1
= 3.3V
= 100μF X5R
3.3V
3.3V
3.3V
3.3V
I
V
V
V
V
V
OUT
OUT
OUT
OUT
OUT
OUT
OUT
2
IN
IN
IN
IN
= 8A
= 1.2V
= 1.5V
= 1.8V
= 2.5V
= 3.3V
2
1.2V
1.5V
1.8V
2.5V
LOAD CURRENT
Step-Down Ratio
OUT
OUT
OUT
OUT
V
20μs/DIV
IN
3
4
(V)
4
6
5
per Figure 18 Typcial Application
4608 G02
4608 G05
4608 G08
6
8
20mV/DIV
100
2A/DIV
3.5
3.0
2.0
1.5
1.0
95
90
85
80
75
70
4.0
2.5
0.5
0
0
0
Effi ciency vs Load Current
V
CONTINUOUS MODE
IN
Load Transient Response
V
V
2.5A/μs STEP
C
C1 = 120pF , C3 = 47pF FROM FIGURE 18
IN
OUT
OUT
to V
1
= 5V
1
= 2.5V
= 100μF X5R
I
V
V
V
V
V
OUT
OUT
OUT
OUT
OUT
OUT
OUT
2
LOAD CURRENT (A)
= 5A
= 1.2V
= 1.5V
= 1.8V
= 2.5V
= 3.3V
2
Step-Down Ratio
2.5V
2.5V
2.5V
3
V
IN
IN
IN
LTM4608
IN
20μs/DIV
3
1.0V
1.5V
1.8V
(V)
4
OUT
OUT
OUT
4
5
5
6
4608 G03
4608 G06
5
4608 G09
4608f
7
6