Datasheet

LTC3129
6
3129fa
For more information www.linear.com/LTC3129
Typical perForMance characTerisTics
Accurate RUN Threshold
vs Temperature (Normalized to 25°C)
Maximum Output Current
vs Temperature (Normalized to 25°C)
V
CC
Dropout Voltage vs Temperature
(PWM Mode, Switching)
V
CC
Dropout Voltage vs V
IN
(PWM Mode, Switching)
Fixed Frequency PWM
Waveforms
T
A
= 25°C, unless otherwise noted.
Average Input Current Limit
vs MPPC Voltage
Burst Mode Threshold
vs V
IN
and V
OUT
Switch R
DS(ON)
vs Temperature
TEMPERATURE (°C)
–45
R
DS(ON)
(Ω)
1.3
1.2
1.1
1.0
0.8
0.7
0.6
0.5
0.9
0.4
–20
3129 G14
13055 10580305
V
CC
= 2.5V
V
CC
= 3V
V
CC
= 4V
V
CC
= 5V
FB Voltage vs Temperature
(Normalized to 25°C)
V
IN
(V)
2
LOAD (mA)
80
70
60
40
30
20
10
50
0
4
3129 G13
16
10 141286
V
OUT
= 2.5V
V
OUT
= 3.3V
V
OUT
= 4.1V
V
OUT
= 5V
V
OUT
= 6.9V
V
OUT
= 8.2V
V
OUT
= 12V
V
OUT
= 15V
TEMPERATURE (°C)
–45
CHANGE IN FB VOLTAGE (%)
1.00
0.50
0.75
0
–0.50
–0.75
–0.25
0.25
–1.00
–20
3129 G15
130
55 10580305
TEMPERATURE (°C)
–45
CHANGE IN RUN THRESHOLD (%)
2
0
–1
1
–2
–20
3129 G16
130
55 10580305
MPPC PIN VOLTAGE (V)
1.13
PERCENTAGE OF FULL INPUT CURRENT (%)
100
90
70
60
50
40
30
20
10
80
0
1.135
3129 G17
1.17
1.1651.161.1551.145 1.151.14
TEMPERATURE (°C)
–45
CHANGE IN MAXIMUM OUTPUT CURRENT (%)
15
10
0
–5
5
–15
–10
–20
3129 G18
130
55 10580305
TEMPERATURE (°C)
–45
DROPOUT (mV)
60
50
30
20
40
0
10
–20
3129 G19
130
55 10580305
V
IN
(V)
2
DROPOUT (mV)
60
50
30
20
40
0
10
2.25
3129 G20
4
3 3.5 3.753.252.752.5
L = 10µH
V
IN
= 7V
V
OUT
= 5V
I
OUT
= 200mA
SW2
5V/DIV
SW1
5V/DIV
3129 G21
500ns/DIV
I
L
200mA/DIV