Datasheet

LTC3129
5
3129fa
For more information www.linear.com/LTC3129
Typical perForMance characTerisTics
Efficiency, V
OUT
= 12V
Maximum Output Current
vs V
IN
and V
OUT
Efficiency, V
OUT
= 5V
T
A
= 25°C, unless otherwise noted.
Power Loss, V
OUT
= 3.3V Power Loss, V
OUT
= 5V
Power Loss, V
OUT
= 12V Efficiency, V
OUT
= 15V
Power Loss, V
OUT
= 15V
V
IN
(V)
2
I
OUT
(mA)
250
200
150
100
50
0
133 4
3129 G11
1510 1411 1285 96 7
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
No Load Input Current
vs V
IN
and V
OUT
(PWM = 0V)
OUTPUT CURRENT (mA)
0.01
EFFICIENCY (%)
100
90
70
50
40
80
60
30
20
10
0
100.1
3129 G05
1000
1 100
BURST
PWM
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 10V
V
IN
= 15V
OUTPUT CURRENT (mA)
0.01
EFFICIENCY (%)
100
90
70
50
40
80
60
30
20
10
0
100.1
3129 G09
1000
1 100
PWM
BURST
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 10V
V
IN
= 15V
OUTPUT CURRENT (mA)
0.01
POWER LOSS (mW)
1000
100
10
1
0.1
0.01
100.1
3129 G04
1000
1 100
BURST
PWM
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 10V
V
IN
= 15V
OUTPUT CURRENT (mA)
0.01
POWER LOSS (mW)
1000
100
10
1
0.1
0.01
100.1
3129 G06
1000
1 100
PWM
BURST
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 10V
V
IN
= 15V
OUTPUT CURRENT (mA)
0.01
EFFICIENCY (%)
100
90
70
50
40
40
80
60
30
20
10
0
100.1
3129 G07
1000
1 100
BURST
PWM
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 10V
V
IN
= 15V
OUTPUT CURRENT (mA)
0.01
POWER LOSS (mW)
1000
100
10
1
0.1
0.01
100.1
3129 G08
1000
1 100
PWM
BURST
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 10V
V
IN
= 15V
OUTPUT CURRENT (mA)
0.01
POWER LOSS (mW)
1000
100
10
1
0.1
0.01
100.1
3129 G10
1000
1 100
BURST
V
IN
= 2.5V
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 10V
V
IN
= 15V
PWM
V
IN
(V)
2.5
I
IN
(µA)
30
25
20
15
10
5
0
12.5
3129 G12
14.510.54.5 8.56.5
V
OUT
= 2.5V
V
OUT
= 5V
V
OUT
= 10V
V
OUT
= 15V
FB DIVIDER CURRENT = 2µA