LT1943EFE Linear Technology, LT1943EFE Datasheet - Page 6
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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
LT1943
TYPICAL PERFOR A CE CHARACTERISTICS
6
100
90
80
70
60
50
40
30
5
V
T
ON
A
= 25°C
10
Current Limit
15
20
V
ON
1.27
1.26
1.25
1.24
1.23
1.22
100
90
80
70
60
50
(V)
25
–50
0
Efficiency, AV
Reference Voltage
V
T
IN
A
= 25°C
–25
30
= 5V
W
0.1
35
0
TEMPERATURE (°C)
LOAD CURRENT (A)
1943 G13
U
0.2
40
25
DD
= 13V
50
0.3
75
1.4
1.3
1.2
1.1
1.0
–50
0.4
Oscillator Frequency
100
1943 G18
1943 G16
–25
125
0.5
0
TEMPERATURE (°C)
25
100
100
90
80
70
60
50
80
60
40
20
0
50
–50
0
Efficiency, V
Bias Pin Current
V
T
A
IN
= 25°C
–25
75
I
= 5V
SW2
0.25
I
I
I
SW2
SW3
SW4
= I
100
= 1.5A
= 0.2A
= 0.3A
SW3
0
1943 G14
0.50
LOAD CURRENT (A)
TEMPERATURE (°C)
125
LOGIC
= I
25
SW4
0.75
= 0A
= 3.3V
50
1.00
75
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
Frequency Foldback
1.25
100
T
A
1943 G19
1943 G17
= 25°C
0.2
1.50
125
FEEDBACK VOLTAGE (V)
0.4
0.6
0.8
1.0
1943 G15
1943fa
1.2