lt1186f Linear Technology Corporation, lt1186f Datasheet - Page 4

• Manufacturer Part Number: lt1186f
• Description: Dac Programmable Ccfl Switching Regulator
• Manufacturer: Linear Technology Corporation

The
temperature range.
Note 1: T
dissipation P
Note 2: Does not include switch leakage.
TYPICAL PERFORMANCE CHARACTERISTICS
LT1186F
ELECTRICAL CHARACTERISTICS
T
= CLK = GND, CCFL V
SYMBOL
SERIAL INTERFACE (Notes 4, 5)
t
t
4
CSLO
CSHI
A
1.2
1.1
1.0
0.9
0.8
0.7
0.6
= 25 C, V
LT1186FCS: T
10
9
8
7
5
4
3
2
1
0
6
–75
–75
denotes specifications which apply over the specified operating
Supply Current
vs Temperature
Shutdown Threshold Voltage
vs Temperature
J
– 50
–50
is calculated from the ambient temperature T
PARAMETER
CS Low Time
CS High Time
D
–25
–25
CC
according to the following formula:
= SHUTDOWN = D
J
TEMPERATURE ( C)
0
0
TEMPERATURE ( C)
= T
25
25
A
+ (P
C
50
50
= 0.5V, unless otherwise specified.
D
75
)(100 C/W)
75
100
100
W
125
125
IN
LT1186F • G04
LT1186F • G01
150
= CS = 3.3V, BAT = Royer = BULB = 12V, I
150
U
175
175
CONDITIONS
f
CLK
A
100
240
230
220
210
200
190
180
170
160
= 2MHz
and power
8O
90
70
50
40
30
20
10
60
0
–75
–75
Shutdown Current
vs Temperature
Frequency vs Temperature
–50
–50
–25
–25
0
TEMPERATURE ( C)
TEMPERATURE ( C)
0
V
25
25
V
CC
CC
= 3V
50
= 5V
50
Note 3: For duty cycles (DC) between 50% and 80%, minimum
guaranteed switch current is given by I
LT1186F due to internal slope compensation circuitry.
Note 4: Timings for all input signals are measured at 0.8V for a High-to-
Low transition and 2.0V for a Low-to-High transition.
Note 5: Timings are guaranteed but not tested.
75
75
100
100
CCFL
125
125
LT1186F • G02
LT1186F • G05
= CCFL V
150
150
175
175
SW
= Open, D
95
93
91
89
85
83
81
79
77
75
87
6
5
4
3
2
1
0
–75
–75
Shutdown Input Bias Current
vs Temperature
Maximum Duty Cycle
vs Temperature
–50
– 50
4550
LIM
MIN
400
OUT
–25
–25 0
= 1.4(1.393 – DC) for the
= Three-State, DIO = I
TEMPERATURE ( C)
0
TEMPERATURE ( C)
25
25 50 75 100
TYP
50
V
V
CC
CC
75
= 3V
= 5V
MAX
100
125
125 150
LT1186F • G03
LT1186F • G06
150
OUT
UNIT
175
175
ns
ns