LTC3442 Просмотр технического описания (PDF) - Linear Technology
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производитель
LTC3442
Linear Technology
LTC3442 Datasheet PDF : 20 Pages
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LTC3442
TYPICAL PERFORMANCE CHARACTERISTICS (TA = 25°C unless otherwise specified).
Input Current Mirror Linearity
1.00
VIN = 3.6V
0.90 VOUT = 3.3V
0.80 RLIM = 133k
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
0 .05 .10 .15 .20 .25 .30 .35 .40 .45 .50
INPUT CURRENT (A)
3442 G04
Quiescent Current vs VIN
(Fixed Frequency Mode)
4.0
3.5
2.0 MHz
3.0
1.5 MHz
2.5
2.0
1.0 MHz
1.5
0.5 MHz
1.0
NO SWITCHING
0.5
0.0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
3442 G07
Automatic Burst Mode Threshold
vs RBURST
160
150
140
LEAVE Burst Mode
OPERATION
130
120
110
100
90
80
ENTER Burst Mode
70
OPERATION
60
150
175
200
225
RBURST (kΩ)
250
3442 G10
4
Average Input Current Limit
vs VIN (Normalized)
8
VOUT = 3.3V
6 1MHz
4
2
0
–2
–4
–6
–8
2.5
3.0
3.5
4.0
4.5 5.0
VIN (V)
3442 G05
Burst Mode Quiescent Current
vs VIN
50
45
40
35
30
25
20
15
10
5
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN (V)
3442 G08
Minimum Start Voltage
vs Temperature
2.30
2.29
2.28
2.27
2.26
2.25
2.24
2.23
2.22
2.21
2.20
–55 –25 5 35 65
TEMPERATURE (°C)
95 125
3442 G11
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Average Input Current Limit
vs Frequency (Normalized)
15
VIN = 5V
10
VOUT SHORTED
5
0
VOUT DROPS 10%
–5
–10
0.50 0.75 1.00 1.25 1.50 1.75 2.00
FREQUENCY (MHz)
3442 TA01b
Peak Current Clamp vs VIN
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.5 3.0
3.5 4.0 4.5
VIN (V)
5.0 5.5
3442 G09
Average Input Current Limit
vs Temperature (Normalized)
5%
4% VIN = VOUT = 3.3V
3%
2%
1%
0%
–1%
–2%
–3%
– 4%
–5%
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
3442 G12
3442fb
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