Datasheet

LTC3407A-2
5
3407a2f
Efficiency vs Load Current
LOAD CURRENT (mA)
1
0
EFFICIENCY (%)
30
20
10
70
60
50
40
100
90
80
10 100 1000
3407A2 G14
2.7V
4.2V
3.3V
V
OUT
= 1.5V Burst Mode OPERATION
Line Regulation
V
IN
(V)
2
V
OUT
ERROR (%)
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
4
6
3407A2 G15
35
V
OUT
= 1.8V
I
OUT
= 200mA
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Efficiency vs Load Current
LOAD CURRENT (mA)
1
0
EFFICIENCY (%)
30
20
10
70
60
50
40
100
90
80
10 100 1000
3407A2 G13
2.7V
4.2V
V
OUT
= 1.2V Burst Mode OPERATION
3.3V
Efficiency vs Load Current
Efficiency vs Load Current
Load Regulation
Reference Voltage vs
Temperature R
DS(ON)
vs Input Voltage R
DS(ON)
vs Temperature
0.615
0.610
0.605
0.600
0.595
0.590
0.585
REFERENCE VOLTAGE (V)
TEMPERATURE (°C)
–50 25 75
3407A2 G07
–25 0
50 100 125
V
IN
= 3.6V
V
IN
(V)
1
500
450
400
350
300
250
200
46
3407A2 G08
2
3
57
R
DS(ON)
(mΩ)
MAIN
SWITCH
SYNCHRONOUS
SWITCH
TEMPERATURE (°C)
–50
550
500
450
400
350
300
250
200
150
100
25 75
3407A2 G09
–25 0
50 100 150125
R
DS(ON)
(mΩ)
MAIN SWITCH
SYNCHRONOUS SWITCH
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 2.7V
LOAD CURRENT (mA)
1
0
EFFICIENCY (%)
30
20
10
70
60
50
40
100
90
80
10 100 1000
3407A2 G10
2.7V
V
OUT
= 2.5V Burst Mode OPERATION
CIRCUIT OF FIGURE 3
3.3V
4.2V
LOAD CURRENT (mA)
1
0
EFFICIENCY (%)
30
20
10
70
60
50
40
100
90
80
10 100 1000
3407A2 G11
Burst Mode OPERATION
PULSE SKIP MODE
V
IN
= 3.6V, V
OUT
= 1.8V
NO LOAD ON OTHER CHANNEL
LOAD CURRENT (mA)
1
–4
V
OUT
ERROR(%)
–3
1
0
–1
–2
4
3
2
10 100 1000
3407A2 G12
Burst Mode OPERATION
PULSE SKIP MODE
V
IN
= 3.6V, V
OUT
= 1.8V
NO LOAD ON OTHER CHANNEL
T
A
= 25°C unless otherwise specified.