Datasheet

LT3690
5
3690fa
Typical perForMance characTerisTics
No Load Supply Current vs V
IN
No Load Supply Current
vs Temperature
Maximum Load Current vs V
IN
Maximum Load Current vs V
IN
Efficiency and Power Loss Efficiency and Power Loss
Efficiency and Power Loss
Efficiency and Power Loss
T
A
= 25°C, unless otherwise noted.
TEMPERATURE (°C)
–50
SUPPLY CURRENT (µA)
200
50
150
100
0
50 100 1250 7525–25
3690 G05
150
V
IN
= 12V
V
OUT
= 3.3V
LOAD CURRENT (A)
0
EFFICIENCY (%)
POWER LOSS (W)
100
60
90
80
70
40
50
3.0
1.0
2.5
2.0
1.5
0
0.5
2 31 2.5 3.5 41.50.5
3690 G01
V
IN
= 12V
V
IN
= 24V
V
IN
= 34V
V
OUT
= 5V
L = 4.7µH
ƒ = 600kHz
LOAD CURRENT (A)
0
EFFICIENCY (%)
POWER LOSS (W)
100
60
90
80
70
40
50
3.0
1.0
2.5
2.0
1.5
0
0.5
2 31 2.5 3.5 41.50.5
3690 G02
V
IN
= 12V
V
IN
= 24V
V
IN
= 34V
V
OUT
= 3.3V
L = 3.3µH
ƒ = 500kHz
LOAD CURRENT (A)
0
EFFICIENCY (%)
POWER LOSS (W)
100
60
90
80
70
40
50
3.0
1.0
2.5
2.0
1.5
0
0.5
2 31 2.5 3.51.50.5
3690 G03
V
IN
= 12V
V
IN
= 24V
V
IN
= 34V
V
OUT
= 3.3V
L = 3.3µH
ƒ = 600kHz
INPUT VOLTAGE (V)
0
INPUT CURRENT (µA)
160
60
80
20
40
140
120
100
0
20 3010 25155
3690 G04
35
V
OUT
= 3.3V
INPUT VOLTAGE (V)
5
LOAD CURRENT (A)
7.0
4.5
4.0
6.0
5.0
3.5
15 25 302010
3690 G06
35
5.5
6.5
TYPICAL
MINIMUM
V
OUT
= 5V
L = 4.7µH
ƒ = 600kHz
INPUT VOLTAGE (V)
5
LOAD CURRENT (A)
7.0
4.5
4.0
6.0
5.0
3.5
15 25 302010
3690 G07
35
5.5
6.5
MINIMUM
TYPICAL
V
OUT
= 3.3V
L = 4.7µH
ƒ = 600kHz
LOAD CURRENT (A)
30
EFFICIENCY (%)
POWER LOSS (W)
50
80
0.0001 0.1000 1.0000 10.0000
0
10
0.0010 0.0100
100
70
90
40
60
20
2.4
0
3.0
1.2
1.8
0.6
3690 G03a
EFFICIENCY
POWER LOSS
V
IN
= 12V
V
IN
= 24V
V
IN
= 34V
V
OUT
= 3.3V, L = 3.3µH, ƒ = 600kHz