LTC3441 データシートの表示（PDF） - Linear Technology
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LTC3441 Datasheet PDF : 20 Pages
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LT3420/LT3420-1
TYPICAL PERFOR A CE CHARACTERISTICS
Graphs apply to both the LT3420 and LT34201-1 unless otherwise noted.
Output Voltage in Refresh Mode,
LT3420-1
335
330
325
320
315
310
305
300
295
–50 –25
FIGURE 2 CIRCUIT
VCC = 3.3V
VBAT = 3.3V
0 25 50 75 100 125
TEMPERATURE (°C)
3420 G04
Charge Pin Input Current
10
TA = 25°C
8
6
4
2
Output Voltage in Refresh Mode,
LT3420-1
335
330
325
320
315
310
305
FIGURE 2 CIRCUIT
300
VCC = VIN
VBAT = VIN
295
TA = 25°C
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
VIN (V)
3420 G05
Primary Current Limit, LT3420
1.7
1.5
1.3
1.1
0
2 3 4 5 6 7 8 9 10
CHARGE PIN VOLTAGE (V)
3420 G07
Efficiency of Figure 1 Circuit,
LT3420
90
TA = 25°C
80
VIN = 5V
VIN = 3.3V
70
60
50
VCC = VBAT = VIN
40
50 100 150 200 250 300 350
VOUT (V)
3420 G10
0.9
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3420 G08
Primary Current Limit, LT3420-1
1.2
1.1
1.0
0.9
0.8
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3420 G11
4
Charge Time, LT3420-1
10
FIGURE 2 CIRCUIT
VOUT CHARGED
FROM 50V TO 320V
8
TA = 25°C
6
COUT = 100µF
4
COUT = 40µF
2
0
2
3
4
5
6
VBAT (V)
3420 G06
Secondary Current Limit, LT3420
60
55
50
45
40
35
30
25
20
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3420 G09
Secondary Current Limit, LT3420-1
35
30
25
20
15
10
5
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3420 G12
3420fa
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