LTC3547
TYPICAL PERFOR A CE CHARACTERISTICS
Oscillator Frequency
vs Temperature
2.6
2.5
LEAKAGE CURRENT (nA)
LEAKAGE CURRENT (pA)
2.4
FREQUENCY (MHz)
2.3
2.2
2.1
2.0
1.9
1.8
– 50 – 25
0
50
75
25
TEMPERATURE (°C)
100
125
0
– 50 – 25
0
V
IN
= 4.2V
V
IN
= 3.6V
V
IN
= 2.7V
40
400
50
Reference Voltage
vs Temperature
612
608
604
R
DS(ON)
(Ω)
V
FB
(mV)
600
596
592
588
– 50
1.0
R
DS(ON)
(Ω)
– 25
50
25
TEMPERATURE (°C)
0
Efficiency vs Load Current
100
90
80
70
EFFICIENCY (%)
EFFICIENCY (%)
60
50
40
30
20
10
0
0.1
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
1
10
100
OUTPUT CURRENT (mA)
1000
3547 G10
V
OUT
= 1.2V
EFFICIENCY (%)
4
U W
75
Switch Leakage vs Temperature
500
Switch Leakage vs Input Voltage
30
300
SYNCHRONOUS
SWITCH
200
20
SYNCHRONOUS
SWITCH
MAIN SWITCH
10
100
MAIN SWITCH
100
125
0
2.5
3
3.5
4.5
4
V
IN
(V)
5
5.5
6
50
75
25
TEMPERATURE (°C)
3547 G04
3547 G05
3547 G06
R
DS(ON)
vs Input Voltage
1.3
MAIN SWITCH
0.9
1.1
0.8
0.7
0.6
0.5
0.5
100
3547 G07
R
DS(ON)
vs Temperature
1.2
V
IN
= 2.7V
1.0
0.9
0.8
0.7
0.6
SYNCHRONOUS
SWITCH
V
IN
= 3.6V
V
IN
= 4.2V
0
0.4
2.5
3
3.5
4.5
4
V
IN
(V)
5
5.5
6
0.4
– 50 – 25
MAIN SWITCH
SYNCHRONOUS
SWITCH
100
125
50
75
25
TEMPERATURE (°C)
3547 G08
3547 G09
Efficiency vs Load Current
100
90
80
70
60
50
40
30
20
10
0
0.1
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
10
100
1
OUTPUT CURRENT (mA)
1000
3547 G11
Efficiency vs Load Current
100
90
80
70
60
50
40
30
20
10
0
0.1
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
1
10
100
OUTPUT CURRENT (mA)
1000
3547 G12
V
OUT
= 1.8V
V
OUT
= 2.5V
3547fa
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
