LT3580EMS8E-TRPBF(RevC) Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Fabricante
LT3580EMS8E-TRPBF
(Rev.:RevC)
(Rev.:RevC)
Linear Technology
LT3580EMS8E-TRPBF Datasheet PDF : 28 Pages
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LT3580
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specified
Switch Current Limit at 1MHz
2.5
2.0
1.5
1.0
0.5
0
10 20 30 40 50 60 70 80 90
DUTY CYCLE (%)
3580 G01
Switch Current Limit at Minimum
Duty Cycle
3.0
2.5
2.0
1.5
1.0
0.5
0
–50
0
50
TEMPERATURE (°C)
100
3580 G04
Oscillator Frequency
2.7
RT = 35.7k
2.5
2.3
2.1
1.9
1.7
1.5
1.3
1.1
–50
RT = 75k
0
50
TEMPERATURE (°C)
100
3580 G07
4
Switch Saturation Voltage
400
350
Switch Current Limit at Minimum
Duty Cycle
2.5
300
250
200
150
100
50
0
0
0.5
1
1.5
SWITCH CURRENT (A)
2
3580 G02
2.0
1.5
1.0
0.5
0
0 200 400 600 800 1000 1200
SS VOLTAGE (mV)
3580 G03
Positive Feedback Voltage
1.24
1.23
Switching Waveforms for
Figure 14 Circuit
VOUT
50mV/DIV
AC COUPLED
1.22
VSW
10V/DIV
1.21
1.20
1.19
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3580 G05
IL
0.5A/DIV
200ns/DIV
3580 G06
Oscillator Frequency During
Soft-Start
1
TA = 35°C
TA = 100°C
TA = 25°C
1/2
1/3
1/4
INVERTING
BOOSTING
CONFIGURATIONS CONFIGURATIONS
0
0 0.2 0.4 0.6 0.8 1.0 1.2
FB VOLTAGE (V)
3580 G08
Internal UVLO
2.40
2.38
2.36
2.34
2.32
2.30
2.28
2.26
2.24
2.22
2.20
–50
0
50
TEMPERATURE (°C)
100
3580 G09
3580fc
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