Datasheet

4
LT1424-5
sn14245 14245fs
TYPICAL PERFOR A CE CHARACTERISTICS
UW
V
C
Pin Threshold and High Clamp
Voltage vs Temperature
TEMPERATURE (°C)
–50
REFERENCE VOLTAGE (V)
5.32
5.34
5.36
25 75
1424-5 G04
5.30
4.28
–25 0
50 100 125
4.26
4.24
Reference Voltage
vs Temperature
TEMPERATURE (°C)
–50
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
25 75
1424-5 G06
–25 0
50 100 125
V
C
PIN VOLTAGE (V)
V
C
HIGH CLAMP
V
C
THRESHOLD
Feedback Amplifier Output
Current vs Flyback Voltage
FLYBACK VOLTAGE (V)
4.50
60
40
20
0
–20
–40
–60
–80
5.25 5.75
1424-5 G05
4.75 5.00
5.50 6.00 6.25
FEEDBACK AMPLIFIER OUTPUT CURRENT (µA)
25°C
125°C
–55°C
SHDN Pin Input Current
vs Voltage
Switching Frequency
vs Temperature
Minimum Synchronization
Voltage vs Temperature
TEMPERATURE (°C)
–50
285
290
300
25 75
1424-5 G07
280
275
–25 0
50 100 125
270
265
295
SWITCHING FREQUENCY (kHz)
TEMPERATURE (°C)
–50
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
25 75
1424-5 G08
–25 0
50 100 125
MINIMUM SYNCHRONIZATION VOLTAGE (V
P-P
)
SHDN PIN VOLTAGE (V)
0
1
0
–1
–2
–3
–4
4
1424-5 G09
1
2
3
5
SHDN PIN INPUT CURRENT (µA)
T
A
= 25°C
SWITCH CURRENT (A)
0
SWITCH SATURATION VOLTAGE (V)
1.2
1.0
0.8
0.6
0.4
0.2
0
0.6 1.0
1424-5 G01
0.2 0.4
0.8 1.2 1.4
125°C
25°C
–55°C
Switch Saturation Voltage
vs Switch Current
TEMPERATURE (°C)
–50
3.1
3.0
2.9
2.8
2.7
2.6
2.5
2.4
25 75
1424-5 G03
–25 0
50 100 125
INPUT VOLTAGE (V)
Minimum Input Voltage
vs Temperature
Switch Current Limit
vs Duty Cycle
DUTY CYCLE (%)
0
SWITCH CURRENT LIMIT (A)
40
1424-5 G02
10
20
30
50 60 70 80 90 100
2.0
1.5
1.0
0.5
0
T
A
= 25°C