LTM4622A
5
Rev B
TYPICAL PERFORMANCE CHARACTERISTICS
1.5V Output Transient Response
8V 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
5V Output Transient Response
3.3V Output Transient Response
Efficiency vs Load Current
at 16V
IN
LOAD CURRENT (A)
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2.0
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
4622A G01
3.3V OUTPUT, 1MHz
1.5V OUTPUT, 1MHz
LOAD CURRENT (A)
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2.0
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
4622A G02
8V OUTPUT, 1.5MHz
5V OUTPUT, 1.5MHz
3.3V OUTPUT, 1MHz
1.5V OUTPUT, 1MHz
LOAD CURRENT (A)
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2.0
60
65
70
75
80
85
90
95
100
EFFICIENCY (%)
4622A G03
3.3V OUTPUT, 1MHz
1.5V OUTPUT, 1MHz
12V OUTPUT, 1.5MHz
8V OUTPUT, 1.5MHz
5V OUTPUT, 1.5MHz
LOAD CURRENT (mA)
0.001
0.01
0.1
1
10
0
10
20
30
40
50
60
70
80
90
100
EFFICIENCY (%)
4622A G04
Burst Mode OPERATION
CMM
12V Output Transient Response
50µs/DIV
LOAD STEP
1A/DIV
V
OUT
AC-COUPLED
50mV/DIV
4622A G05
V
IN
= 12V, V
OUT
= 1.5V, f
SW
= 1MHz
OUTPUT CAPACITOR = 47µF ×1 CERAMIC
10pF FEED-FORWARD CAPACITOR
LOAD-STEP = 1A TO 2A (10A/μs)
50µs/DIV
LOAD STEP
1A/DIV
V
OUT
AC-COUPLED
50mV/DIV
4622A G06
V
IN
= 12V, V
OUT
= 3.3V, f
SW
= 1MHz
OUTPUT CAPACITOR = 47µF ×1 CERAMIC
10pF FEED-FORWARD CAPACITOR
LOAD-STEP = 1A TO 2A (10A/μs)
50µs/DIV
LOAD STEP
1A/DIV
V
OUT
AC-COUPLED
100mV/DIV
4622A G07
V
IN
= 12V, V
OUT
= 5V, f
SW
= 1MHz
OUTPUT CAPACITOR = 47µF ×2 CERAMIC
10pF FEED-FORWARD CAPACITOR
LOAD-STEP = 1A TO 2A (10A/μs)
50µs/DIV
LOAD STEP
1A/DIV
V
OUT
AC-COUPLED
100mV/DIV
4622A G08
V
IN
= 12V, V
OUT
= 8V, f
SW
= 1.5MHz
OUTPUT CAPACITOR = 47µF ×2 CERAMIC
10pF FEED-FORWARD CAPACITOR
LOAD-STEP = 1A TO 2A (10A/μs)
50µs/DIV
LOAD STEP
1A/DIV
V
OUT
AC-COUPLED
100mV/DIV
4622A G09
V
IN
= 16V, V
OUT
= 12V, f
SW
= 1.5MHz
OUTPUT CAPACITOR = 47µF ×2 CERAMIC
10pF FEED-FORWARD CAPACITOR
LOAD-STEP = 1A TO 2A (10A/μs)
