LT1158
TYPICAL PERFORMANCE CHARACTERISTICS
DC Supply Current
14
I
2
+ I
10
+ I
16
12
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
INPUT HIGH
10
INPUT LOW
8
6
4
2
0
0
5
10
15 20 25 30
SUPPLY VOLTAGE (V)
35
40
ENABLE LOW
V13 = V
+
V13 = 0V
12
10
8
INPUT LOW
6
4
2
0
–50 –25
ENABLE LOW
14
I
2
+ I
10
+ I
16
V
+
= 12V
25
SUPPLY CURRENT (mA)
INPUT HIGH
20
15
10
5
0
1
10
INPUT FREQUENCY (kHz)
100
LT1158 G03
DC Supply Current
30
Dynamic Supply Current (V
+
)
50% DUTY CYCLE
C
GATE
= 3000pF
V
+
= 24V
V
+
= 12V
V
+
= 6V
50
25
75
0
TEMPERATURE (°C)
100
125
LT1158 G01
LT1158 G02
Dynamic Supply Current
40
35
SUPPLY CURRENT (mA)
30
25
20
15
10
5
0
1
10
INPUT FREQUENCY (kHz)
100
LT1158 G04
Charge Pump Output Voltage
50
INPUT THRESHOLD VOLTAGE (V)
2.0
1.8
1.6
1.4
1.2
45
40
TOP GATE VOLTAGE (V)
35
30
25
20
15
10
5
0
0
5
10 15 20 25 30
SUPPLY VOLTAGE (V)
0.8
35
40
10μA LOAD
NO LOAD
Input Thresholds
50% DUTY CYCLE
V
+
= 12V
V(HIGH)
–40°C
+25°C
+85°C
–40°C
+25°C
+85°C
V(LOW)
C
GATE
= 10000pF
C
GATE
= 3000pF
C
GATE
= 1000pF
1.0
0
5
10 15 20 25 30
SUPPLY VOLTAGE (V)
35
40
LT1158 G05
LT1158 G06
Enable Thresholds
3.5
FAULT CONDUCTION THRESHOLD (mV)
ENABLE THRESHOLD VOLTAGE (V)
3.0
2.5
2.0
1.5
1.0
0.5
0
0
5
10
15 20 25 30
SUPPLY VOLTAGE (V)
35
40
V(LOW)
–40°C
+25°C
+85°C
V(HIGH)
–40°C
+25°C
+85°C
160
150
140
130
120
110
100
90
80
70
60
Fault Conduction Threshold
200
V11 = 0V
CURRENT LIMIT THRESHOLD (mV)
190
180
170
160
150
140
130
120
110
0
5
10 15 20 25 30
SUPPLY VOLTAGE (V)
35
100
40
Current Limit Threshold
CLOSED LOOP
+85°C
+25°C
–40°C
+85°C
+25°C
–40°C
0
5
10 15 20 25 30
SUPPLY VOLTAGE (V)
35
40
LT1158 G07
LT1158 G08
LT1158 G09
1158fb
4
LINEAR_DIMENSIONS [ LINEAR DIMENSIONS SEMICONDUCTOR ]
