LT1952
5
1952f
TYPICAL PERFOR A CE CHARACTERISTICS
UW
V
IN
Start-up Current vs
Temperature V
IN
I
Q
vs Temperature
SD_V
SEC
Turn ON Threshold vs
Temperature
SD_V
SEC
Pin Current vs
Temperature
V
IN
Turn ON/OFF Voltage vs
Temperature
COMP Active Threshold vs
Temperature
FB Voltage vs Temperature
Switching Frequency vs
Temperature
V
IN
Shutdown Current vs
Temperature
TEMPERATURE (°C)
–50
1.20
FB VOLTAGE (V)
1.22
1.25
0
50
75
1952 G01
1.21
1.24
1.23
–25
25
100
125
TEMPERATURE (°C)
–50
155
SWITCHING FREQUENCY (kHz)
185
245
0
50
75
1952 G02
170
230
215
200
–25
25
100
125
TEMPERATURE (°C)
–50
100
V
IN
SHUTDOWN CURRENT (µA)
200
500
0
50
75
1952 G03
150
400
300
450
350
250
–25
25
100
125
V
IN
= 15V
SD_V
SEC
= 0V
TEMPERATURE (°C)
–50
V
IN
STARTUP CURRENT (µA)
200
500
0
50
75
1952 G04
400
300
450
600
550
350
250
–25
25
100
125
SD_V
SEC
= 1.4V
TEMPERATURE (°C)
–50
3.5
V
IN
I
Q
(mA)
4.5
6.5
0
50
75
1952 G05
4.0
6.0
5.5
5.0
–25
25
100
125
OC = OPEN
TEMPERATURE (°C)
–50
1.22
SD_V
SEC
TURN ON THRESHOLD (V)
1.27
1.42
0
50
75
1952 G06
1.37
1.32
–25
25
100
125
TEMPERATURE (°C)
–50
0
SD_V
SEC
PIN CURRENT (µA)
15
0
50
75
1952 G07
10
5
–25
25
100
125
0µA PIN CURRENT AFTER
PART TURN ON
PIN CURRENT BEFORE
PART TURN ON
TEMPERATURE (°C)
–50
6
8
V
IN
(V)
18
16
14
12
0
50
75
1952 G08
10
–25
25
100
125
V
IN
TURN OFF VOLTAGE
V
IN
TURN ON VOLTAGE
TEMPERATURE (°C)
–50
0
COMP (V)
0.4
1.6
1.4
1.2
0
50
75
1952 G09
0.2
1.0
0.8
0.6
–25
25
100
125
R
ISENSE
= 0k
