LT1725
TYPICAL PERFOR A CE CHARACTERISTICS
Minimum Switch-On Time vs
Temperature
275
MINIMUM SWITCH-ON TIME (ns)
R
TON
= 50k
MINIMUM ENABLE TIME (ns)
250
225
200
175
150
125
–50
ENABLE DELAY TIME (ns)
–25
50
25
75
0
TEMPERATURE (°C)
FEEDBACK AMPLIFIER TRANSCONDUCTANCE (µmho)
Feedback Amplifier Output Current
vs FB Pin Voltage
FEEDBACK AMPLIFIER OUTPUT CURRENT (µA)
80
60
40
20
0
–20
T
A
= 125°C
–40
–60
–80
1.05 1.10
1.15 1.20 1.25 1.30 1.35 1.40
FB PIN VOLTAGE (V)
1725 G13
T
A
= 25°C
Soft-Start Charging Current vs
Temperature
60
SOFT-START CHARGING CURRENT (µA)
50
40
30
20
10
0
–50
SOFT-START SINK CURRENT (mA)
–25
U W
100
1725 G10
Minimum Enable Time vs
Temperature
275
250
225
200
175
150
125
–50
R
MINENAB
= 50k
Enable Delay Time vs
Temperature
275
250
225
200
175
150
125
–50
125
–25
50
25
75
0
TEMPERATURE (°C)
100
125
–25
50
25
75
0
TEMPERATURE (°C)
100
125
1725 G11
1725 G12
Feedback Amplifier
Transconductance vs Temperature
1600
1400
1200
1000
800
600
400
200
–50 –25
T
A
= –55°C
50
25
75
0
TEMPERATURE (°C)
100
125
1725
G14
Soft-Start Sink Current vs
Temperature
2.5
V(SFST) = 1.5V
2.0
V(SFST) = 0V
1.5
1.0
0.5
50
25
75
0
TEMPERATURE (°C)
100
125
0
–50
–25
50
0
75
25
TEMPERATURE (°C)
100
125
1725 G15
1725 G16
1725f
5
LINER [ LINEAR TECHNOLOGY ]
