Datasheet

5
LT1737
1737fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
TEMPERATURE (°C)
–50
MINIMUM SWITCH ON TIME (ns)
275
250
225
200
175
150
125
25 75
1737 G10
–25 0
50 100 125
R
TON
= 50k
TEMPERATURE (°C)
–50
MINIMUM ENABLE TIME (ns)
275
250
225
200
175
150
125
25 75
1737 G11
–25 0
50 100 125
R
MINENAB
= 50k
TEMPERATURE (°C)
–50
ENABLE DELAY TIME (ns)
275
250
225
200
175
150
125
25 75
1737 G12
–25 0
50 100 125
Minimum Switch On Time vs
Temperature
Minimum Enable Time vs
Temperature
Enable Delay Time vs
Temperature
FB PIN VOLTAGE (V)
1.05
FEEDBACK AMPLIFIER OUTPUT CURRENT (µA)
1.35
1737 G13
1.15 1.25
80
60
40
20
0
–20
–40
–60
–80
1.10 1.20 1.30 1.40
T
A
= 125°C
T
A
= –55°C
T
A
= 25°C
TEMPERATURE (°C)
–50
1600
1400
1200
1000
800
600
400
200
25 75
1737 G14
–25 0
50 100 125
FEEDBACK AMPLIFIER TRANSCONDUCTANCE (µmho)
TEMPERATURE (°C)
–50
SOFT-START CHARGING CURRENT (µA)
60
50
40
30
20
10
0
25 75
1737 G15
–25 0
50 100 125
V(SFST) = 0V
TEMPERATURE (°C)
–50
SOFT-START SINK CURRENT (mA)
2.5
2.0
1.5
1.0
0.5
0
0
50
75
1737 G16
–25
25
100
125
V(SFST) = 1.5V
Feedback Amplifier Output Current
vs FB Pin Voltage
Feedback Amplifier
Transconductance vs Temperature
Soft-Start Charging Current vs
Temperature
Soft-Start Sink Current vs
Temperature