Datasheet

LT3470
4
3470fd
Typical perForMance characTerisTics
Efficiency, V
OUT
= 3.3V Efficiency, V
OUT
= 5V V
FB
vs Temperature
Top and Bottom Switch Current
Limits (V
FB
= 0V) vs Temperature
V
IN
Quiescent Current
vs Temperature
BIAS Quiescent Current
(Bias > 3V) vs Temperature
SHDN Bias Current
vs Temperature
FB Bias Current (V
FB
= 1V)
vs Temperature
LOAD CURRENT (mA)
50
EFFICIENCY (%)
70
90
40
60
80
0.1 10 100
3470 G01
30
1
L = TOKO D52LC 47µH
T
A
= 25°C
V
IN
= 7V
V
IN
= 12V
V
IN
= 36V
V
IN
= 24V
LOAD CURRENT (mA)
50
EFFICIENCY (%)
70
90
40
60
80
0.1 10 100
3470 G02
30
1
L = TOKO D52LC 47µH
T
A
= 25°C
V
IN
= 12V
V
IN
= 36V
V
IN
= 24V
TEMPERATURE (°C)
–50
1.240
V
FB
(V)
1.245
1.250
1.255
1.260
–25 0 25 50
3470 G03
75 100 125
TEMPERATURE (°C)
–50
CURRENT LIMIT (mA)
350
25
3470 G04
200
100
–25 0 50
50
0
400
300
250
150
75 100 150125
TEMPERATURE (°C)
–50 –25
0
V
IN
CURRENT (µA)
20
50
0
50
75
3470 G05
10
40
30
25
100
150125
BIAS < 3V
BIAS > 3V
TEMPERATURE (°C)
–50
BIAS CURRENT (µA)
20
25
30
25 75
3470 G06
15
10
–25 0
50 100 150125
5
0
TEMPERATURE (°C)
–50
0
SHDN CURRENT (µA)
1
3
4
5
50
9
3470 G07
2
0
–25
75 100
25 150125
6
7
8
V
SHDN
= 36V
V
SHDN
= 2.5V
TEMPERATURE (°C)
–50 –25
0
FB CURRENT (nA)
20
60
50
0
50
75
3470 G08
10
40
30
25
100
150125