Datasheet

LTC3105
5
3105fa
Exiting MPPC Control on
Input Voltage Step
I
PEAK
and I
VALLEY
Current Limit
Change vs Temperature
Input and Output Burst Ripple
Efficiency vs Output Current and
Power Loss, V
OUT
= 3.3V
Efficiency vs Output Current and
Power Loss, V
OUT
= 5V
No-Load Input Current
vs Input Voltage
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, V
AUX
= V
OUT
= 3.3V, V
LDO
= 2.2V,
V
IN
= 0.6V, unless otherwise noted.
INPUT VOLTAGE (V)
0.2
0
INPUT CURRENT (µA)
200
400
600
0.4
0.6 0.8 1.0
800
100
300
500
700
1.2
3105 G16
V
OUT
= 3.3V
OUTPUT CURRENT (mA)
EFFICIENCY (%)
POWER LOSS (mW)
60
70
80
50
40
10
0
30
90
20
100
0.1
1000
10
1
3105 G14
V
IN
= 0.6V
V
IN
= 0.8V
V
IN
= 1V
EFFICIENCY
POWER LOSS
0.01
1
0.1
10 100
OUTPUT CURRENT (mA)
0.01
EFFICIENCY (%)
POWER LOSS (mW)
60
70
80
50
40
1
0.1
10 100
30
100
90
20
100
0.1
1000
10
1
3105 G15
V
IN
= 3V
V
IN
= 2V
V
IN
= 1.5V
EFFICIENCY
POWER LOSS
TEMPERATURE (°C)
–45
CHANGE FROM 25°C (%)
–0.5
–15 15 45
–1.5
–1.0
1.0
–2.0
–2.5
0.5
0
–30 0 75 9030 60
3105 G11
I
VALLEY
I
PEAK
15µs/DIV
3105 G10
V
IN
VOLTAGE
200mV/DIV
INDUCTOR
CURRENT
100mA/DIV
MPPC VOLTAGE
200mV/DIV
V
MPPC
= 400mV
INPUT VOLTAGE (V)
0.25
40
EFFICIENCY (%)
60
80
1.25
2.25 3.25 4.25
100
50
70
90
5.25
3105 G12
V
OUT
= 3V
I
LOAD
= 10mA
LDO = 2.2V
50µs/DIV
3105 G13
OUTPUT
VOLTAGE
50mV/DIV
INPUT
VOLTAGE
5mV/DIV
SW CURRENT
200mA/DIV
V
IN
= 0.6V
C
IN
= 470µF
V
OUT
= 3.3V
I
OUT
= 15mA
C
OUT
= 10µF
Efficiency vs V
IN