Datasheet

LT3680
4
3680fb
INPUT VOLTAGE (V)
0
SUPPLY CURRENT (μA)
15
3680 G04
50
30
510 20
10
130
110
90
70
25 30 35
V
OUT
= 3.3V
DUTY CYCLE (%)
0
SWITCH CURRENT LIMIT(A)
40
3680 G08
4.5
20 60
3.5
3.0
6.0
5.5
5.0
4.0
80 100
TEMPERATURE (°C)
–50
SUPPLY CURRENT (μA)
350
25
3680 G05
200
100
–25 0 50
50
0
400
300
250
150
75 100 150125
V
IN
= 12V
V
OUT
= 3.3V
CATCH DIODE: DIODES, INC. PDS360
INCREASED SUPPLY
CURRENT DUE TO CATCH
DIODE LEAKAGE AT
HIGH TEMPERATURE
OUTPUT CURRENT (A)
0 0.5
50
EFFICIENCY (%)
70
100
1
2
2.5
3680 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
3680 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
INPUT VOLTAGE (V)
5
LOAD CURRENT (A)
15
3680 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
INPUT VOLTAGE (V)
5
LOAD CURRENT (A)
15
3680 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
TEMPERATURE (°C)
SWITCH CURRENT LIMIT (A)
4.0
4.5
5.5
5.0
3680 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
Effi ciency
Effi ciency
No Load Supply Current Maximum Load Current
Switch Current Limit Switch Current Limit
Maximum Load Current
No Load Supply Current
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
3680 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
TYPICAL PERFORMANCE CHARACTERISTICS