LT1943EFE Linear Technology, LT1943EFE Datasheet - Page 3

• Manufacturer Part Number: LT1943EFE
• Description: IC REG SW QUAD TFT LCD 28-TSSOP
• Manufacturer: Linear Technology

Specifications of LT1943EFE

• Applications: Converter, TFT, LCD
• Voltage - Input: 4.5 ~ 22 V
• Number Of Outputs: 4
• Voltage - Output: 1.25 ~ 40 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
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
CESAT
CESAT
CESAT
A
= 25°C. V
CONDITIONS
4.5V < V
(Note 4)
∆I = 5µA
Duty Cycle = 35% (Note 6)
I
FB1 = 1.5V
I
I
4.5V < V
(Note 4)
∆I = 5µA
I
FB2 = 1.5V
I
4.5V < V
(Note 4)
∆I = 5µA
I
FB3 = 1.5V
I
I = 170mA
SW
SW
SW
SW2
SW2
SW3
SW3
The
= 2A
= 1.5A (Note 7)
= 1.5A
= 2A
= 0.2A
= 2A
= 0.2A
●
IN
IN
IN
IN
denotes the specifications which apply over the full operating
< 22V
< 22V
< 22V
= 12V, RUN-SS, SS-234 = 2.5V unless otherwise noted.
●
●
●
●
●
●
●
●
●
●
●
●
1.23
1.22
1.23
1.22
1.23
1.22
0.35
MIN
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
MAX
1000
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
µmhos
µmhos
µmhos
UNITS
1943fa
3
%/V
%/V
%/V
V/V
V/V
V/V
mV
mA
mV
mA
mV
mA
mV
nA
µA
nA
µA
nA
µA
%
%
%
%
V
V
A
V
V
V
A
V
V
A