Datasheet

LTC3412A
4
3412afe
typicAl perForMAnce chArActeristics
Efficiency vs Input Voltage Efficiency vs Frequency Load Regulation
Burst Mode Operation Output Voltage Ripple
Load Step Transient Burst Mode
Operation
Efficiency vs Load Current
Efficiency vs Load Current,
Burst Mode Operation
Efficiency vs Load Current,
Forced Continuous Operation
LOAD CURRENT (A)
0.01
EFFICIENCY (%)
100
90
80
70
60
50
40
30
20
10
0
0.1 1 10
3412A GO1
Burst Mode
OPERATION
FORCED
CONTINUOUS
V
IN
= 3.3V
V
OUT
= 2.5V
FIGURE 4 CIRCUIT
EFFICIENCY (%)
100
95
90
85
80
75
70
65
60
55
50
LOAD CURRENT (A)
0.01 0.1 1 10
3412A GO2
V
IN
= 3.3V
V
OUT
= 2.5V
FIGURE 4 CIRCUIT
V
IN
= 5V
LOAD CURRENT (A)
0.01 0.1 1 10
EFFICIENCY (%)
100
90
80
70
60
50
40
30
20
10
0
3412A GO3
V
OUT
= 2.5V
FIGURE 4 CIRCUIT
V
IN
= 3.3V
V
IN
= 5V
INPUT VOLTAGE (V)
2.5
94
92
90
88
86
84
82
80
4.0
3412A GO4
3.0 3.5 4.5 5.0
EFFICIENCY (%)
0.1A
1A
3A
FIGURE 4 CIRCUIT
3412A GO5
EFFICIENCY (%)
96
95
94
93
92
91
90
89
88
87
FREQUENCY (MHz)
0 4.0
1.0
2.0
3.0
0.5 1.5 2.5
3.5
0.22µH
0.47µH
1µH
FIGURE 4 CIRCUIT
V
IN
= 3.3V
LOAD CURRENT (A)
0
∆V
OUT
/V
OUT
(%)
0
–0.1
–0.2
–0.3
–0.4
–0.5
–0.6
0.5
1.0 1.5 2.0
3412A GO6
2.5 3.0
FIGURE 4 CIRCUIT
V
IN
= 3.3V
3412A GO7
5µs/DIV
V
OUT
20mV/DIV
INDUCTOR
CURRENT
1A/DIV
FIGURE 4 CIRCUIT
3412A GO8
5µs/DIV
FORCED
CONTINUOUS
20mV/DIV
PULSE
SKIPPING
20mV/DIV
BURST
MODE
20mV/DIV
V
IN
= 3.3V
V
OUT
= 2.5V
FIGURE 4 CIRCUIT
3412A GO9
40µs/DIV
V
OUT
100mV/DIV
INDUCTOR
CURRENT
2A/DIV
V
IN
= 3.3V
V
OUT
= 2.5V
F = 1MHz
LOAD STEP = 50mA TO 2A
FIGURE 4 CIRCUIT