LT1943EFE Linear Technology, LT1943EFE Datasheet - Page 5

• 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

TYPICAL PERFOR A CE CHARACTERISTICS
600
500
400
300
200
100
6.0
5.5
5.0
4.5
4.0
3.5
3.0
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0
–50
0
SW2 V
0
SW3 Current Limit
MINIMUM Input Voltage to Start,
V
T
LOGIC
T
A
A
–25
= 25°C
= 25°C
0.5
20
CESAT
= 3.3V
LOAD CURRENT (mA)
0
1.0
SW2 CURRENT (A)
TEMPERATURE (°C)
40
25
1.5
50
60
2.0
75
W
80
2.5
100
1943 G10
1943 G04
1943 G07
U
3.0
100
125
500
400
300
200
100
100
0.8
0.7
0.6
0.5
0.4
0.3
0.2
80
60
40
20
0
0
–50
0
SW3 V
SW4 Current Limit
0
BOOST Pin Current
T
T
A
A
–25
= 25°C
= 25°C
0.5
CESAT
0.1
0
TEMPERATURE (°C)
SW3 CURRENT (A)
1.0
SW1 CURRENT (A)
25
0.2
1.5
50
2.0
75
0.3
2.5
100
1943 G11
1943 G05
1943 G08
0.4
125
3.0
500
400
300
200
100
600
500
400
300
200
100
5.0
4.5
4.0
3.5
3.0
2.5
0
0
–50
SW1 V
SW2 Current Limit
0
SW4 V
0
T
T
A
A
–25
= 25°C
= 25°C
0.5
CESAT
CESAT
0.1
0
TEMPERATURE (°C)
1.0
SW1 CURRENT (A)
SW4 CURRENT (A)
25
1.5
0.2
50
LT1943
2.0
75
0.3
2.5
100
1943 G06
1943 G09
1943 G12
1943fa
5
125
3.0
0.4