LT3954IUHE Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Fabricante
LT3954IUHE Datasheet PDF : 26 Pages
| |||
LT3954
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
SW Pin Current Limit
vs Temperature
6.6
6.4
6.2
6.0
5.8
5.6
5.4
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3954 G10
INTVCC Current Limit vs
vs Temperature
40
38
36
34
32
30
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3954 G13
SW Pin Current Limit
vs Duty Cycle
6.6
6.4
6.2
6.0
5.8
5.6
5.4
0
20
40
60
DUTY CYCLE (%)
80 100
3954 G11
INTVCC Dropout Voltage
vs Current, Temperature
0
–0.2
–0.4
TA = –45°C
–0.6
–0.8
TA = 25°C
–1.0
TA = 130°C
–1.2
–1.4
–1.6
–1.8
0
5 10 15 20 25 30
LDO CURRENT (mA)
3954 G14
EN/UVLO Threshold
vs Temperature
1.27
1.25
RISING
1.23
FALLING
1.21
1.19
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3954 G12
Internal Switch On-Resistance
vs Temperature
50
45
40
35
30
25
20
15
10
5
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3954 G15
PWM Signal Generator Duty Ratio
vs DIM/SS Current
100
80
PWM Signal Generator Frequency
vs Duty Ratio
340
CPWM = 47nF
320
PWMOUT Waveform
CPWMOUT = 2.2nF
PWM
INPUT
60
PWMOUT
300
5V/DIV
40
20
0
–10 0
10 20 30 40 50
DIM/SS CURRENT (µA)
3954 G16
280
260
0
20
40
60
80
100
DUTY RATIO (%)
3954 G17
200ns/DIV
3954 G18
3954fa
6
For more information www.linear.com/3954
Share Link: 