LT1950 Linear Technology, LT1950 Datasheet - Page 5

• Manufacturer Part Number: LT1950
• Description: Single Switch PWM Controller
• Manufacturer: Linear Technology

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TYPICAL PERFOR A CE CHARACTERISTICS
9.2
8.7
8.2
7.7
7.2
40
35
30
25
20
15
10
14
12
10
8
6
4
2
0
–50
–50
–50
SHDN Input Current *(–1) vs
Temperature
V
vs Temperature
BLANK Override Threshold –
I
Temperature
SENSE
IN2
–25
–25
–25
SHDN = SHDN THRESHOLD + 70mV
SHDN = SHDN THRESHOLD – 100mV
: GATE Enable
Maximum Threshold vs
0
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
TEMPERATURE ( C)
GATE DISABLE
GATE ENABLE
HYSTERESIS
25
25
25
50
50
50
75
75
75
W
100
100
100
1950 G07
1950 G13
1950 G10
U
125
125
125
13.0
12.5
12.0
11.5
11.0
10.5
10.0
3.00
2.75
2.50
2.25
2.00
9.5
9.0
11
10
9
8
7
6
5
4
3
–50
–50
–50
Minimum V
Temperature (V
V
vs Temperature
SHDN Current Hysteresis vs
Temperature
IN2
–25
–25
–25
: BOOST Disable
0
0
0
TEMPERATURE ( C)
BOOST RE-ENABLE
TEMPERATURE ( C)
TEMPERATURE ( C)
BOOST DISABLE
IN
HYSTERESIS
Start-Up Voltage vs
25
25
25
IN2
Boosted)
50
50
50
75
75
75
100
100
100
1950 G08
1950 G11
1950 G14
125
125
125
250
200
150
100
125
100
3.1
2.9
2.7
2.5
2.3
2.1
1.9
1.7
1.5
50
75
50
25
0
–50
–50
0
V
GATE Rise/Fall Time vs
GATE Capacitance
BOOST Switch I
Temperature
T
IN
A
= 25 C
–25
–25
I
Q
1000
vs Temperature
GATE CAPACITANCE (pF)
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
2000
25
25
t
t
f
r
LIMIT
50
50
3000
LT1950
vs
75
75
sn1950 1950fs
4000
100
100
1950 G15
1950 G09
1950 G12
5
5000
125
125