LT1786F Linear Technology, LT1786F Datasheet - Page 5

• Manufacturer Part Number: LT1786F
• Description: SMBus Programmable CCFL Switching Regulator
• Manufacturer: Linear Technology

TYPICAL PERFORMANCE CHARACTERISTICS
–3
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
2.4
2.3
2.2
2.1
2.0
1.9
1.7
10
–1
–2
1.8
9
8
7
6
5
4
3
2
1
0
0
–75
–75
–75
V
vs Temperature
Negative DIO Voltage
vs Temperature
V
vs Temperature
C
C
– 50
– 50
–50
Sink Offset Current
High Clamp Voltage
–25 0
–25
–25 0
TEMPERATURE ( C)
TEMPERATURE ( C)
TEMPERATURE ( C)
CCFL V
0
CCFL V
25 50 75 100
I(DIO) = 10mA
25
25
I(DIO) = 5mA
I(DIO) = 1mA
CCFL V
C
50
50
= 1.0V
C
= 0.5V
75
C
75
= 1.5V
100
100
W
125 150
125
125
150
150 175
1786 G13
1786 G16
U
1786 G10
175
175
5.10
5.05
5.00
4.95
4.90
4.85
4.80
103
102
101
100
1.3
1.0
0.8
0.6
1.2
1.1
0.9
0.7
99
98
97
96
95
–75
–75
–75
vs Temperature
V
vs Temperature
V
vs Temperature
C
C
CCFL V
I
– 50
CCFL
– 50
– 50
to DIO Current Servo Ratio
Switching Threshold
I(DIO) = 1mA
–25
–25
–25 0
Programming Current
I
CCFL
I
C
CCFL
0
TEMPERATURE ( C)
TEMPERATURE ( C)
Source Current for
TEMPERATURE ( C)
0
= 50 A
I(DIO) = 10mA
I
= 100 A
CCFL
25
25
25
50
= 10 A
I(DIO) = 5mA
50
50
75
75
75
100
100
100
125
125
125
150
150 175
150
1786 G11
1786 G14
1786 G17
175
175
0.30
0.25
0.20
0.15
0.10
0.05
1.2
1.0
0.8
0.6
0.4
0.2
7.5
7.4
7.3
7.2
7.0
6.9
6.8
6.7
6.6
6.5
7.1
0
0
–75
–75
–75
Positive DIO Voltage
vs Temperature
V
vs Temperature
BULB Protect Servo Voltage
vs Temperature
C
– 50
–50
– 50
Low Clamp Voltage
–25
–25
–25 0
I
I(DIO) = 1mA
CCFL
0
TEMPERATURE ( C)
TEMPERATURE ( C)
I
0
TEMPERATURE ( C)
CCFL
I
I(DIO) = 10mA
CCFL
= 100 A
25
25
25 50 75 100
= 50 A
= 10 A
50
50
LT1786F
75
75
100
100
I(DIO) = 5mA
125
125
125 150
150
150
1786 G12
1786 G15
1786 G18
5
175
175
175