LT1943 LINER [Linear Technology], LT1943 Datasheet - Page 9

• Manufacturer Part Number: LT1943
• Description: High Current Quad Output Regulator for TFT LCD Panels
• Manufacturer: LINER [Linear Technology]

BLOCK DIAGRA
AV
DD
V
E3
V
C4
LOGIC
C15
V
R9
R6
R5
ON
R8
V
C9
R2
R1
R14
IN
C5
C1
15
23
18
17
5
25
26
4
6
RUN-SS
V
FB1
PGOOD
FB2
C
SS-234
FB3
V
IN
T
ON
16
1.7 A
1.7 A
20 A
REGULATOR
REFERENCE
INTERNAL
LOCKOUT
OSCILLATOR
–
+
1.125V
AND
MASTER
SW2
SW3
SW4
V
1.2MHz
W
IN
– – –
–
+
1.1V
–
+
–
+
1.25V
BIAS
2.8V
OSCILLATOR
OSCILLATOR
OSCILLATOR
OSCILLATOR
FOLDBACK
FOLDBACK
FOLDBACK
FOLDBACK
1.25V
1.25V
1.25V
1.25V
COMPENSATION
+
+
+
+
–
–
–
–
gm
gm
gm
gm
SLOPE
–
+
Figure 2.
COMPENSATION
COMPENSATION
COMPENSATION
–
+
–
+
–
+
–
+
SLOPE
SLOPE
SLOPE
S Q
S Q
S Q
S Q
R
R
R
R
DRIVER
DRIVER
DRIVER
DRIVER
3A
SWITCH
2.6A
SWITCH
400mA
SWITCH
300mA
SWITCH
13
BOOST
NFB4
BIAS
SW3
SW1
SW4
VC2
VC4
VC1
FB4
VC3
E3
14
10
19
12
22
27
10
20
24
3
8
7
9
C7
C23
D1
C20
C21
SW2
C16
28
C24
C22
C10
LT1943
C3
D3
L5
R13
D2
C14
L4
D6
L3
C6
R10
R11
L1
C12
C11
D5
C2
R12
C13
C8
L2
R4
R3
9
V
1943i
V
V
AV
V
V
V
E3
LOGIC
IN
IN
OFF
LOGIC
DD