Datasheet

LTC3407
4
sn3407 3407fs
LOAD CURRENT (mA)
1
EFFICIENCY (%)
100
95
90
85
80
75
70
65
60
10 100 1000
3407 G10
3.3V
2.7V
4.2V
V
OUT
= 2.5V Burst Mode OPERATION
CIRCUIT OF FIGURE 1
LOAD CURRENT (mA)
1
EFFICIENCY (%)
100
95
90
85
80
75
70
65
60
10 100 1000
3407 G13
2.7V
4.2V
V
OUT
= 1.2V Burst Mode OPERATION
CIRCUIT OF FIGURE 1
LOAD CURRENT (mA)
1
EFFICIENCY (%)
100
95
90
85
80
75
70
65
60
10 100 1000
3407 G14
2.7V
4.2V
V
OUT
= 1.5V Burst Mode OPERATION
CIRCUIT OF FIGURE 1
LOAD CURRENT (mA)
1
EFFICIENCY (%)
100
95
90
85
80
75
70
65
60
10 100 1000
3407 G11
V
IN
= 3.6V, V
OUT
= 1.8V
NO LOAD ON OTHER CHANNEL
LOAD CURRENT (mA)
1
V
OUT
ERROR (%)
4
3
2
1
0
–1
–2
–3
–4
10 100 1000
3407 G12
V
IN
= 3.6V, V
OUT
= 1.8V
NO LOAD ON OTHER CHANNEL
3.3V
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
3407 G15
35
V
OUT
= 1.8V
I
OUT
= 200mA
T
A
= 25°C
3.3V
Burst Mode OPERATION
Burst Mode OPERATION
PULSE SKIP MODEPULSE SKIP MODE
V
IN
(V)
1
500
450
400
350
300
250
200
46
3407 G08
2
3
57
R
DS(ON)
(mΩ)
MAIN
SWITCH
SYNCHRONOUS
SWITCH
0.615
0.610
0.605
0.600
0.595
0.590
0.585
REFERENCE VOLTAGE (V)
TEMPERATURE (°C)
–50
550
500
450
400
350
300
250
200
150
100
25 75
3407 G09
–25 0
50 100 150125
TEMPERATURE (°C)
–50 25 75
3407 G07
–25 0
50 100 125
R
DS(ON)
(mΩ)
MAIN SWITCH
SYNCHRONOUS SWITCH
V
IN
= 3.6V
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 2.7V
T
A
= 25°C
Efficiency vs Load Current
Efficiency vs Load Current
Load Regulation
Efficiency vs Load Current
Efficiency vs Load Current
Line Regulation
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Reference Voltage vs
Temperature R
DS(ON)
vs Input Voltage R
DS(ON)
vs Temperature