LT1943EFE Linear Technology, LT1943EFE Datasheet - Page 3
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LT1943EFE
Manufacturer Part Number
LT1943EFE
Description
IC REG SW QUAD TFT LCD 28-TSSOP
Manufacturer
Linear Technology
Datasheet
1.LT1943EFE.pdf
(20 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LT1943EFE
Manufacturer:
MAX
Quantity:
5 750
Part Number:
LT1943EFE
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT1943EFE#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LT1943EFE#TRPBF
Manufacturer:
INTERSIL
Quantity:
211
Part Number:
LT1943EFE#TRPBF
Manufacturer:
LINEAR
Quantity:
20 000
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