LT1725
TYPICAL PERFOR A CE CHARACTERISTICS
V
CC
Turn-On Voltage vs
Temperature
16.00
V
CC
HYSTERESIS VOLTAGE (V)
15.75
V
CC
TURN-ON VOLTAGE (V)
15.50
15.25
15.00
14.75
14.50
14.25
–50 –25
6.00
5.75
5.50
5.25
5.00
4.75
–50 –25
START-UP CURRENT (µA)
50
25
75
0
TEMPERATURE (°C)
Supply Current vs Temperature
13
UVLO PIN INPUT CURRENT (µA)
1
12
SUPPLY CURRENT (mA)
–1
–2
–3
–4
–5
–6
–50 –25
V
UVLO
= 1.3V
OSCILLATOR FREQUENCY (kHz)
11
10
9
8
–50 –25
50
25
0
75
TEMPERATURE (°C)
V
C
CLAMP VOLTAGE, SWITCHING THRESHOLD (V)
V
GATE
vs I
SINK
1.0
0.8
T
A
= 125°C
V
GATE
(V)
0.6
T
A
= 25°C
0.4
VCC-V
GATE
(V)
0.2
T
A
= –55°C
0
1
10
I
SINK
(mA)
1725 G07
100
4
U W
100
1725 G01
V
CC
Hysteresis Voltage vs
Temperature
6.50
6.25
250
Start-Up Current vs Temperature
200
150
100
50
125
50
25
75
0
TEMPERATURE (°C)
100
125
0
–50
–25
50
0
75
25
TEMPERATURE (°C)
100
125
1725
G02
1725 G03
UVLO Pin Input Current vs
Temperature
115
V
UVLO
= 1.2V
Oscillator Frequency vs
Temperature
0
110
105
100
95
90
85
–50 –25
100
125
50
25
75
0
TEMPERATURE (°C)
100
125
50
25
75
0
TEMPERATURE (°C)
100
125
1725 G04
1725
G05
1725 G06
V
CC
-V
GATE
vs I
SOURCE
0
–0.5
–1.0
T
A
= 125°C
T
A
= 25°C
–1.5
–2.0
–2.5
–3.0
1000
3.0
2.5
2.0
1.5
1.0
0.5
V
C
Clamp Voltage, Switching
Threshold vs Temperature
CLAMP VOLTAGE
T
A
= –55°C
SWITCHING THRESHOLD
1
10
100
I
SOURCE
(mA)
1000
1725 G08
0
–50
–25
50
25
75
0
TEMPERATURE (°C)
100
125
1725 G09
1725f
LINER [ LINEAR TECHNOLOGY ]
