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LT1613 Scheda tecnica(PDF) 4 Page - Linear Technology

Il numero della parte LT1613
Spiegazioni elettronici  Boost/Inverting DC/DC Converter with 2A Switch, Soft-Start, and Synchronization
PDF  28 Pages
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Produttore elettronici  LINER [Linear Technology]
Homepage  http://www.linear.com
Logo LINER - Linear Technology

LT1613 Scheda tecnica(HTML) 4 Page - Linear Technology

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background image
LT3580
4
3580fg
TYPICAL PERFORMANCE CHARACTERISTICS
Switch Current Limit at 1MHz
Switch Saturation Voltage
Switch Current Limit at Minimum
Duty Cycle
Switch Current Limit at Minimum
Duty Cycle
Positive Feedback Voltage
Switching Waveforms for
Figure 14 Circuit
Oscillator Frequency
Oscillator Frequency During
Soft-Start
Internal UVLO
TA = 25°C unless otherwise specified
DUTY CYCLE (%)
10
0
0.5
1.0
1.5
2.0
30
50
70
90
3580 G01
2.5
20
40
60
80
SWITCH CURRENT (A)
0
200
250
300
2
3580 G02
150
100
0
0.5
1
1.5
50
400
350
SS VOLTAGE (mV)
0
0
0.5
1.0
1.5
2.0
200
400
600
800
3580 G03
1000
1200
2.5
TEMPERATURE (°C)
–50
0
0.5
1.0
1.5
2.0
2.5
3.0
0
50
100
3580 G04
TEMPERATURE (°C)
–50
–25
1.19
1.21
1.24
0
50
75
3580 G05
1.20
1.23
1.22
25
100
125
VOUT
50mV/DIV
AC COUPLED
VSW
10V/DIV
IL
0.5A/DIV
200ns/DIV
3580 G06
TEMPERATURE (°C)
–50
1.9
2.1
2.3
3580 G07
1.7
1.5
1.1
0
50
100
1.3
2.7
RT = 35.7k
2.5
RT = 75k
FB VOLTAGE (V)
0
0
1/4
1/2
TA = –35°C
TA = 25°C
TA = 100°C
1/3
1
0.2
0.4
INVERTING
CONFIGURATIONS
BOOSTING
CONFIGURATIONS
0.6
0.8
3580 G08
1.0
1.2
TEMPERATURE (°C)
–50
2.20
2.22
2.26
2.28
2.30
2.40
2.34
0
50
3580 G09
2.24
2.36
2.38
2.32
100



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