Datasheet

LTC3617
4
3617fa
typical perForMance characteristics
Efficiency vs Input Voltage Efficiency vs Frequency
Line Regulation Output Voltage vs Time
INPUT VOLTAGE (V)
40
EFFICIENCY (%)
50
60
70
100
90
2.752.25 3.25 4.253.75 4.75
3617 G02
5.25
80
V
OUT
= 1.25V
I
LOAD
= 600mA
I
LOAD
= 2A
I
OUT
= 6A
INPUT VOLTAGE (V)
2.20
–0.3
V
OUT
ERROR (%)
–0.2
–0.1
0
0.1
0.3
2.75
3.30 3.85 4.40
3617 G05
4.95 5.50
0.2
V
OUT
20mV/DIV
SW
2V/DIV
I
L
1A/DIV
2µs/DIV
3617 G06
V
OUT
= 1.25V
I
LOAD
= 100mA
T
A
= 25°C, V
IN
= 3.3V, f
O
= 1MHz unless otherwise noted.
Efficiency vs Load Current
Load Regulation
LOAD CURRENT (A)
–6 –4 –2
–0.3
V
OUT
ERROR (%)
0.3
0.2
0.1
0
3617 G04
6420
–0.1
–0.2
V
OUT
= 1.25V
LOAD CURRENT (A)
30
EFFICIENCY (%)
90
100
20
10
80
50
70
60
40
0.1 1 10
3617 G01
0
V
IN
= 2.5V
V
IN
= 3.3V
V
IN
= 5V
V
OUT
= 1.25V
FREQUENCY (MHz)
1
60
EFFICIENCY (%)
75
70
65
80
85
90
100
95
1.5 2.52 3 3.5
3617 G03
4
150nH
330nH
470nH
V
OUT
= 1.25V
Load Step Transient Load Step Transient
V
OUT
100mV/DIV
I
L
4A/DIV
40µs/DIV
3617 G07
V
OUT
= 1.25V
I
LOAD
= 100mA TO 6A
COMPENSATION FIGURE 1
V
OUT
200mV/DIV
I
L
5A/DIV
40µs/DIV
3617 G09
V
OUT
= 1.25V
I
LOAD
= –6A TO 6A
COMPENSATION FIGURE 1