LT1943 LINER [Linear Technology], LT1943 Datasheet - Page 3

• Manufacturer Part Number: LT1943
• Description: High Current Quad Output Regulator for TFT LCD Panels
• Manufacturer: LINER [Linear Technology]

PARAMETER
SWITCH 1 (2.4A BUCK)
FB1 Voltage
FB1 Voltage Line Regulation
FB1 Pin Bias Current
Error Amplifier 1 Voltage Gain
Error Amplifier 1 Transconductance
Switch 1 Current Limit
Switch 1 V
Switch 1 Leakage Current
Minimum BOOST Voltage Above SW1 Pin
BOOST Pin Current
Maximum Duty Cycle (SW1)
SWITCH 2 (2.6A BOOST)
FB2 Voltage
FB2 Voltage Line Regulation
FB2 Pin Bias Current
Error Amplifier 2 Voltage Gain
Error Amplifier 2 Transconductance
Switch 2 Current Limit
Switch 2 V
Switch 2 Leakage Current
BIAS Pin Current
Maximum Duty Cycle (SW2)
SWITCH 3 (350mA BOOST)
FB3 Voltage
FB3 Voltage Line Regulation
FB3 Pin Bias Current
Error Amplifier 3 Voltage Gain
Error Amplifier 3 Transconductance
Switch 3 Current Limit
Switch 3 V
Switch 3 Leakage Current
BIAS Pin Current
Maximum Duty Cycle (SW3)
Schottky Diode Drop
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
CESAT
CESAT
CESAT
A
= 25 C. V
CONDITIONS
4.5V < V
(Note 4)
Duty Cycle = 35%
I
FB1 = 1.5V
I
I
4.5V < V
(Note 4)
I
FB2 = 1.5V
I
4.5V < V
(Note 4)
I
FB3 = 1.5V
I
I = 170mA
SW
SW
SW
SW2
SW2
SW3
SW3
I = 5 A
I = 5 A
I = 5 A
The
= 2A
= 1.5A
= 1.5A
= 2A
= 0.2A
= 2A
= 0.2A
IN
IN
IN
IN
< 22V
< 22V
< 22V
denotes the specifications which apply over the full operating
= 12V, RUN-SS, SS-234 = 2.5V unless otherwise noted.
MIN
1.23
1.22
1.23
1.22
1.23
1.22
0.35
2.4
2.6
82
85
84
83
1.25
0.01
1.25
0.01
1.25
0.01
TYP
100
200
450
310
220
200
450
360
100
200
450
180
700
3.2
0.1
1.8
3.8
0.1
0.5
0.1
30
92
45
92
14
88
LT1943
1000
MAX
1.27
1.27
0.03
1.27
1.27
0.03
1.27
1.27
0.03
600
470
540
600
280
4.3
2.5
4.9
0.7
10
50
1
1
UNITS
mhos
mhos
mhos
3
%/V
%/V
%/V
1943i
V/V
V/V
V/V
mV
mA
mV
mA
mV
mA
mV
nA
nA
nA
%
%
%
%
V
V
A
A
V
V
V
A
A
V
V
A
A