Datasheet

LTC3614
5
3614fa
TYPICAL PERFORMANCE CHARACTERISTICS
Effi ciency vs Input Voltage
Burst Mode Operation
(V
MODE
= 0V)
Effi ciency vs Frequency
Burst Mode Operation
(V
MODE
= 0V), I
OUT
= 2A
Line Regulation Burst Mode Operation
Pulse-Skipping Mode Operation
Forced Continuous Mode Operation
INPUT VOLTAGE (V)
30
EFFICIENCY (%)
40
50
60
70
100
90
2.5 3 43.5 4.5
3614 G04
5 5.5
80
V
OUT
= 1.8V
I
OUT
= 6mA
I
OUT
= 600mA
I
OUT
= 2A
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
3614 G07
4.95 5.50
0.2
V
OUT
20mV/DIV
I
L
1A/DIV
20µs/DIV
3614 G08
V
OUT
= 1.8V
I
OUT
= 150mA
V
MODE
= 0V
V
OUT
20mV/DIV
I
L
1A/DIV
20µs/DIV
3614 G09
V
OUT
= 1.8V
I
OUT
= 150mA
V
MODE
= 3.3V
V
OUT
20mV/DIV
I
L
500mA/DIV
1µs/DIV
3614 G10
V
OUT
= 1.8V
I
OUT
= 100mA
V
MODE
= 1.5V
V
IN
= 3.3V, RT/SYNC = SV
IN
unless otherwise noted.
Load Step Transient in
Pulse-Skipping Mode
Load Step Transient in
Burst Mode Operation
Load Regulation
(V
OUT
= 1.8V)
OUTPUT CURRENT (mA)
0
–0.3
V
OUT
ERROR (%)
1.5
0.3
0.7
1.1
1.3
0.9
0.1
0.5
1000
2000 3000
3614 G06
4000
–0.1
FORCED CONTINUOUS MODE
PULSE-SKIPPING MODE
INTERNAL Burst Mode OPERATION
V
OUT
100mV/DIV
I
LOAD
2A/DIV
100µs/DIV
3614 G11
V
OUT
= 1.8V
I
LOAD
= 100mA TO 4A
V
MODE
= 3.3V
COMPENSATION FIGURE 1
V
OUT
100mV/DIV
I
LOAD
2A/DIV
100µs/DIV
3614 G12
V
OUT
= 1.8V
I
LOAD
= 100mA TO 4A
V
MODE
= 0V
COMPENSATION FIGURE 1
FREQUENCY (MHz)
0.5
82
EFFICIENCY (%)
85
84
83
86
87
88
89
90
95
94
1 1.5 2.52 3 3.5
3614 G05
4 4.5
93
92
91
V
IN
= 3.3V
V
OUT
= 1.8V
150nH
330nH
470nH