LT1943EFE#PBF Linear Technology, LT1943EFE#PBF Datasheet - Page 6

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

Specifications of LT1943EFE#PBF

• 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: Lead free / RoHS Compliant

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