Datasheet

LT3468/LT3468-1/LT3468-2
4
346812fa
LT3468-1 Switch Current Limit
LT3468-1 Output VoltageLT3468 Output Voltage
LT3468 Switch Current Limit
V
IN
(V)
2345678
V
OUT
(V)
3468 G13
324
323
322
318
319
320
321
T
A
= –40°C
T
A
= 25°C
T
A
= 85°C
V
IN
(V)
2345678
V
OUT
(V)
3468 G14
324
323
322
318
319
320
321
T
A
= –40°C
T
A
= 25°C
T
A
= 85°C
TEMPERATURE (°C)
–40 –20 0 20 40 60 10080
I
LIM
(A)
3468 G16
1.5
1.1
1.2
1.3
1.4
V
IN
= 3V
V
OUT
= 0V
TEMPERATURE (°C)
–40 –20 0 20 40 60 10080
I
LIM
(A)
3468 G17
0.700
0.500
0.540
0.580
0.620
0.660
V
IN
= 3V
V
OUT
= 0V
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LT3468 curves use the circuit of Figure 6, LT3468-1
curves use the circuit of Figure 7 and LT3468-2 use the circuit of Figure 8 unless otherwise noted.
LT3468 Efficiency LT3468-1 Efficiency
V
OUT
(V)
50 100 150 200 250 300
EFFICIENCY (%)
3468 G10
90
80
40
50
60
70
V
IN
= 2.8V
V
IN
= 4.2V
T
A
= 25°C
V
IN
= 3.6V
V
OUT
(V)
50 100 150 200 250 300
EFFICIENCY (%)
3468 G11
90
80
40
50
60
70
V
IN
= 2.8V
V
IN
= 4.2V
V
IN
= 3.6V
T
A
= 25°C
TEMPERATURE (°C)
–40
I
LIM
(A)
1.00
0.96
0.92
0.88
0.84
0.80
0
40
60
34682 G18
–20
20
80
100
V
IN
= 3V
V
OUT
= 0V
V
OUT
(V)
50
EFFICIENCY (%)
90
80
70
60
50
40
250
3468 G12
100
150
200
300
T
A
= 25°C
V
IN
= 4.2V
V
IN
= 2.8V
V
IN
= 3.6V
V
IN
(V)
V
OUT
(V)
319
318
317
316
315
314
313
312
3468 G15
2
3
45678
T
A
= 25°C
T
A
= 85°C
T
A
= –40°C
LT3468-2 Switch Current Limit
LT3468-2 Output Voltage
LT3468-2 Efficiency