Datasheet

LTM4622
5
Rev. G
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TYPICAL PERFORMANCE CHARACTERISTICS
1V Output Transient Response
1.8V Output Transient Response
2.5V Output Transient Response
Efficiency vs Load Current
at 5V
IN
Efficiency vs Load Current
at 12V
IN
Burst Mode Efficiency,
12V
IN
, 1.5V
OUT
LOAD CURRENT (A)
EFFICIENCY (%)
4622 G01
0
80
85
90
3
75
70
60
65
0.5 1.0 1.5 2.0
2.5
95
2.5V, 1.5MHz
1.5V, 1MHz
1.0V, 1MHz
1.2V, 1MHz
1.8V, 1MHz
3.3V, 2MHz
OUTPUT:
LOAD CURRENT (A)
EFFICIENCY (%)
4622 G02
0
80
85
90
3
75
70
60
65
0.5 1.0 1.5 2.0
2.5
95
3.3V, 2MHz
1.8V, 1MHz
1.2V, 1MHz
1.0V, 1MHz
1.5V, 1MHz
2.5V, 1.5MHz
5.0V, 2.5MHz
OUTPUT:
V
OUT
100mV/DIV
AC-COUPLED
LOAD STEP
1A/DIV
V
IN
= 12V
V
OUT
= 1V
F
S
= 1MHz
OUTPUT CAPACITOR = 1 × 47µF CERAMIC
LOAD STEP = 1.25A TO 2.5A
20μs/DIV
4622 G04
V
OUT
100mV/DIV
AC-COUPLED
LOAD STEP
1A/DIV
V
IN
= 12V
V
OUT
= 1.8V
F
S
= 1MHz
OUTPUT CAPACITOR = 1 × 47µF CERAMIC
LOAD STEP = 1.25A TO 2.5A
20µs/DIV
4622 G07
V
OUT
100mV/DIV
AC-COUPLED
LOAD STEP
1A/DIV
V
IN
= 12V
V
OUT
= 2.5V
F
S
= 1.5MHz
OUTPUT CAPACITOR = 1 × 47µF CERAMIC
LOAD STEP = 1.25A TO 2.5A
20µs/DIV
4622 G08
LOAD CURRENT (A)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.01 0.1 1
4622 G03
0
Burst Mode OPERATION
CCM
V
OUT
100mV/DIV
AC-COUPLED
LOAD STEP
1A/DIV
V
IN
= 12V
V
OUT
= 1.2V
F
S
= 1MHz
OUTPUT CAPACITOR = 1 × 47µF CERAMIC
LOAD STEP = 1.25A TO 2.5A
20µs/DIV
4622 G05
V
OUT
100mV/DIV
AC-COUPLED
LOAD STEP
1A/DIV
V
IN
= 12V
V
OUT
= 1.5V
F
S
= 1MHz
OUTPUT CAPACITOR = 1 × 47µF CERAMIC
LOAD STEP = 1.25A TO 2.5A
20µs/DIV
4622 G06
1.5V Output Transient Response
1.2V Output Transient Response
Efficiency vs Load Current
at 3.3V
IN
LOAD CURRENT (A)
EFFICIENCY (%)
4622 G02b
0
80
85
90
3
75
70
60
65
0.5 1.0 1.5 2.0
2.5
95
1.8V, 1MHz
1.2V, 1MHz
1.0V, 1MHz
1.5V, 1MHz
2.5V, 1.5MHz
OUTPUT:
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