Datasheet

LTM4618
5
4618fa
TYPICAL PERFORMANCE CHARACTERISTICS
2.5V Transient Response 3.3V Transient Response 5V Transient Response
Effi ciency vs Load Current with
Different Mode Settings
(12V to 3.3V) 1.2V Transient Response 1.5V Transient Response
Effi ciency vs Load Current with
5V
IN
(CCM)
Effi ciency vs Load Current with
12V
IN
(CCM)
Effi ciency vs Load Current with
24V
IN
(CCM)
LOAD CURRENT (A)
0
EFFICIENCY (%)
100
95
90
80
85
75
70
42
4618 G01
6315
5V TO 0.8V
OUT
5V TO 1.2V
OUT
5V TO 1.5V
OUT
5V TO 2.5V
OUT
5V TO 3.3V
OUT
LOAD CURRENT (A)
0
EFFICIENCY (%)
100
95
90
80
85
75
70
42
4618 G02
6315
12V TO 1.2V
OUT
12V TO 1.5V
OUT
12V TO 2.5V
OUT
12V TO 3.3V
OUT
12V TO 5V
OUT
LOAD CURRENT (A)
0
EFFICIENCY (%)
95
90
80
85
75
70
42
4618 G03
6315
24V TO 2.5V
OUT
24V TO 3.3V
OUT
24V TO 5V
OUT
LOAD CURRENT (A)
0.01
EFFICIENCY (%)
100
90
70
80
60
50
40
30
20
10
0
4618 G04
10.1
BURST
PULSE SKIP
CCM
V
IN
= 12V
V
OUT
= 3.3V
I
OUT
1A/DIV
V
OUT
50mV/DIV
4618 G05
50µs/DIV
V
IN
= 12V AND V
OUT
= 1.2V AT 3A/µs LOAD STEP
C
OUT
= 2= 22µF 6.3V CERAMIC CAPACITOR
1= 100µF 6.3V CERAMIC CAPACITOR
1= 220
µ
F SANYO POSCAP
V
OUT
50mV/DIV
I
OUT
1A/DIV
4618 G06
50µs/DIV
V
IN
= 12V AND V
OUT
= 1.5V AT 3A/µs LOAD STEP
C
OUT
= 2= 22µF 6.3V CERAMIC CAPACITOR
1= 100µF 6.3V CERAMIC CAPACITOR
1= 220
µ
F SANYO POSCAP
V
OUT
50mV/DIV
I
OUT
1A/DIV
4618 G07
50µs/DIV
V
IN
= 12V AND V
OUT
= 2.5V AT 3A/µs LOAD STEP
C
OUT
= 2= 22µF 6.3V CERAMIC CAPACITOR
1= 100µF 6.3V CERAMIC CAPACITOR
1= 220
µ
F SANYO POSCAP
V
OUT
50mV/DIV
I
OUT
1A/DIV
4618 G08
50µs/DIV
V
IN
= 12V AND V
OUT
= 3.3V AT 3A/µs LOAD STEP
C
OUT
= 2= 22µF 6.3V CERAMIC CAPACITOR
1= 100µF 6.3V CERAMIC CAPACITOR
1= 220
µ
F SANYO POSCAP
V
OUT
100mV/DIV
I
OUT
1A/DIV
4618 G09
50µs/DIV
V
IN
= 12V AND V
OUT
= 5V AT 3A/µs LOAD STEP
C
OUT
= 2= 22µF 6.3V CERAMIC CAPACITOR
1= 100µF 6.3V CERAMIC CAPACITOR
1= 220
µ
F SANYO POSCAP