LT3467/LT3467A
TYPICAL APPLICATIONS
9V, 18V, –9V Triple Output TFT-LCD Bias Supply with Soft-Start
D1
D2
18V
10mA
C4
1μF
C3
0.1μF
Start-Up Waveforms
L1
4.7μH
D5
V
9V
220mA
IN
9V OUTPUT
5V/DIV
3.3V
C1
2.2μF
–9V OUTPUT
5V/DIV
V
SW
IN
R1
124k
V
SHDN
SHDN
LT3467
C5
10μF
SS
FB
3.3V
GND
R2
20k
0V
18V OUTPUT
10V/DIV
C2
0.1μF
C7
0.1μF
C1: X5R OR X7R, 6.3V
C2,C3, C5, C6: X5R OR X7R, 10V
C4: X5R OR X7R, 25V
D1 TO D4: PHILIPS BAT54S OR EQUIVALENT
D5: PHILIPS PMEG 2005
L1: PANASONIC ELT5KT4R7M
I
L1
D4
D3
0.5A/DIV
3467 TA06b
2ms/DIV
C6
1μF
–9V
10mA
3467 TA06a
8V, 23V, –8V Triple Output TFT-LCD Bias Supply with Soft-Start
D1
D2
D3
D4
23V
10mA
C3
0.1μF
C4
0.1μF
C5
0.1μF
C6
1μF
Start-Up Waveforms
L1
4.7μH
D7
V
8V OUTPUT
5V/DIV
–8V OUTPUT
5V/DIV
8V
IN
3.3V
SHDN
3.3V
270mA
C1
R1
V
SW
2.2μF
IN
113k
V
SHDN
LT3467
C7
10μF
SS
FB
GND
R2
21k
23V OUTPUT
10V/DIV
0V
C9
C2
0.1μF
0.1μF
C1: X5R OR X7R, 6.3V
I
L1
0.5A/DIV
D5
D6
C2 TO C4, C7, C8: X5R OR X7R, 10V
C5: X5R OR X7R, 16V
3467 TA07b
2ms/DIV
C8
C6: X5R OR X7R, 25V
1μF
D1 TO D6: PHILIPS BAT54S OR EQUIVALENT
D7: PHILIPS PMEG 2005
–8V
10mA
L1: PANASONIC ELT5KT4R7M
3467 TA07a
3467afe
13
Linear Systems [ Linear Systems ]
