Datasheet

LT1512
4
1512fb
For more information www.linear.com/LT1512
Typical perForMance characTerisTics
SWITCH CURRENT (A)
0
SWITCH SATURATION VOLTAGE (V)
0.6
0.8
1.0
1.6
1512 G01
0.4
0.2
0.5
0.7
0.9
0.3
0.1
0
0.4
0.8
1.2
2.0
1.4
0.2
0.6
1.0
1.8
100°C
150°C
25°C
–55°C
DUTY CYCLE (%)
SWITCH CURRENT LIMIT (A)
3.0
2.5
2.0
1.5
1.0
0.5
0
20 40 60 80
1512 G02
10010
0
30 50 70 90
25°C AND
125°C
–55°C
TEMPERATURE (°C)
–50
1.8
INPUT VOLTAGE (V)
2.0
2.2
2.4
2.6
0 50
100
150
1512 G03
2.8
3.0
–25 25
75
125
TEMPERATURE (°C)
–50
0
MINIMUM SYNCHRONIZATION VOLTAGE (V
P-P
)
0.5
1.0
1.5
2.0
0 50
100
150
1512 G04
2.5
3.0
–25 25
75
125
f
SYNC
= 700kHz
TEMPERATURE (°C)
–50
FEEDBACK INPUT CURRENT (nA)
400
500
600
150
1512 G05
300
200
0
0
50
100
100
800
700
–25
25
75
125
V
FB
= V
REF
TEMPERATURE (°C)
–50
–50
NEGATIVE FEEDBACK INPUT CURRENT (µA)
–30
0
0
50
75
1512 G06
–40
–10
–20
–25 25
100
125
150
Minimum Peak-to-Peak
Synchronization Voltage vs Temp
Feedback Input Current
vs Temperature
Negative Feedback Input Current
vs Temperature
Switch Saturation Voltage
vs Switch Current
Switch Current Limit
vs Duty Cycle
Minimum Input Voltage
vs Temperature