Datasheet

LT3682
4
3682f
TYPICAL PERFORMANCE CHARACTERISTICS
LOAD CURRENT (mA)
0.1
EFFICIENCY (%)
60
70
40
50
80
1000
3682 G01
30
10
20
1
10
100
90
V
IN
= 12V
V
IN
= 34V
V
IN
= 24V
L = 10µH
f = 800kHz
LOAD CURRENT (mA)
EFFICIENCY (%)
3682 G02
0.1
60
70
40
50
80
1000
30
10
20
1
10
100
90
V
IN
= 12V
V
IN
= 34V
V
IN
= 24V
L = 10µH
f = 800kHz
LOAD CURRENT (mA)
0.1
EFFICIENCY (%)
POWER LOSS(W)
70
60
80
90
1000
3682 G03
20
30
40
50
10
1
10
100
100
0.1
0.01
0.001
1
V
IN
= 12V
V
OUT
= 3.3V
L = 10µH
f = 800kHz
INPUT VOLTAGE(V)
0
SUPPLY CURRENT (µA)
80
60
100
40
3682 G04
20
40
0
5
10
15 20 30 3525
120
V
OUT
= 3.3V
TEMPERATURE(°C)
50
SUPPLY CURRENT (µA)
700
600
500
800
900
3682 G05
400
300
200
100
0
25
0
25 50 100 12575
1000
CATCH DIODE: DIODES, INC. B150
V
IN
= 12V
V
OUT
= 3.3V
INCREASED SUPPLY CURRENT
DUE TO CATCH DIODE LEAKAGE
AT HIGH TEMPERATURE
INPUT VOLTAGE (V)
05
LOAD CURRENT (A)
1.25
1
0.75
1.5
40
3682 G06
0.5
0.25
10
15
20 30 3525
1.75
TYPICAL
MINIMUM
V
OUT
= 3.3V
L = 10µH
f = 800kHz
SYNC = 0V
SYNC = 3.3V
INPUT VOLTAGE (V)
5
LOAD CURRENT (A)
1
0.75
1.25
40
3682 G07
0.5
0.25
10
15
20 30 3525
1.5
TYPICAL
MINIMUM
V
OUT
= 5V
L = 10µH
f = 800kHz
SYNC = 0V
SYNC = 5V
INPUT VOLTAGE (V)
8
LOAD CURRENT (A)
1
1.25
20
3682 G08
0.5
0.75
0.25
10
12
14 16 18
1.5
TYPICAL
MINIMUM
V
OUT
= 5V
L = 4.7µH
f = 2MHz
SYNC = 0V
SYNC = 5V
INPUT VOLTAGE (V)
0
LOAD CURRENT (A)
1.5
1.25
1.75
40
3682 G09
1
0.75
0.50
0.25
5
10
15 20 30 3525
TYPICAL
MINIMUM
V
OUT
= 1.8V
L = 10µH
f = 500kHz
SYNC = 0V
SYNC = 3.3V
No Load Supply Current No Load Supply Current Maximum Load Current
Maximum Load Current Maximum Load Current Maximum Load Current
Effi ciency (V
OUT
= 5V, SYNC = 0V) Effi ciency (V
OUT
= 3.3V, SYNC = 0V) Effi ciency (V
OUT
= 3.3V, SYNC = 0V)
T
A
= 25°C, unless otherwise noted.