Datasheet

LT3693
4
3693f
OUTPUT CURRENT (A)
0 0.5
50
EFFICIENCY (%)
70
100
1
2
2.5
3693 G01
60
90
80
1.5
3
3.5
V
IN
= 12V
V
IN
= 34V
V
OUT
= 5V
L = 4.7μH
f = 600kHz
V
IN
= 24V
OUTPUT CURRENT (A)
0 0.5
50
EFFICIENCY (%)
70
100
1
2
2.5
3693 G02
60
90
80
1.5
3
3.5
V
IN
= 12V
V
IN
= 34V
V
OUT
= 3.3V
L = 3.3μH
f = 600kHz
V
IN
= 24V
Effi ciency
Effi ciency
INPUT VOLTAGE (V)
5
LOAD CURRENT (A)
15
3693 G06
4.0
10 20
3.0
2.5
5.5
5.0
4.5
3.5
25 30
TYPICAL
MINIMUM
V
OUT
= 3.3V
T
A
= 25°C
L = 4.7μH
f = 600kHz
Maximum Load Current
DUTY CYCLE (%)
0
SWITCH CURRENT LIMIT(A)
40
3693 G08
4.5
20 60
3.5
3.0
6.0
5.5
5.0
4.0
80 100
Switch Current Limit
TYPICAL PERFOR A CE CHARACTERISTICS
UW
SWITCH CURRENT (A)
0
BOOST PIN CURRENT (mA)
15
45
60
75
120
3693 G11
30
90
105
0312 45
Boost Pin Current
TEMPERATURE (°C)
SWITCH CURRENT LIMIT (A)
4.0
4.5
5.5
5.0
3693 G09
3.5
3.0
2.0
2.5
6.5
6.0
DUTY CYCLE = 10 %
DUTY CYCLE = 90 %
–50 25–25 0 50 75 100 150125
Switch Current Limit
INPUT VOLTAGE (V)
5
LOAD CURRENT (A)
15
3693 G07
4.5
10 20
3.5
3.0
5.5
5.0
4.0
25 30
TYPICAL
MINIMUM
V
OUT
= 5V
T
A
= 25°C
L = 4.7μH
f = 600kHz
Maximum Load Current
SWITCH CURRENT (A)
0
400
500
700
3
3693 G10
300
200
12 45
100
0
600
VOLTAGE DROP (mV)
Switch Voltage Drop
Effi ciency
T
A
= 25°C unless otherwise noted.
OUTPUT CURRENT (A)
0 0.5
50
EFFICIENCY (%)
TOTAL POWER LOSS (W)
70
100
1
2
2.5
3693 G03
60
90
80
0.5
1.5
3.0
1.0
2.5
2.0
1.5
3
3.5
V
IN
= 12V
V
OUT
= 5V
L = 4.7μH
f = 600kHz
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