Datasheet

13
LT1610
TYPICAL APPLICATIONS
U
3.3V TO 8V/70mA, –8V/5mA, 24V/5mA TFT LCD Bias Supply Uses All Ceramic Capacitors
D1
D4
0.22µF
L1
5.4µH
65
8
2
4
7
3
1
V
IN
SW
LT1610
PGND
COMP
V
C
FB
SHDN
GND
0.22µF
100k
48.7k
1610 TA18
274k
C1
4.7µF
V
IN
3.3V
C2
4.7µF
1µF
1µF
1µF
0.22µF
AV
DD
8V
70mA
0.22µF: TAIYO YUDEN EMK212BJ224MG
1µF: TAIYO YUDEN LMK212BJ105MG
4.7µF: TAIYO YUDEN LMK316BJ475ML
D1: MOTOROLA MBRO520
D2, D3, D4: BAT54S
L1: SUMIDA CDRH5D185R4
V
ON
24V
5mA
V
OFF
–8V
5mA
51pF
D3
D2
TFT LCD Bias Supply Transient Response
AV
DD
200mV/DIV
V
ON
500mV/DIV
V
OFF
200mV/DIV
70mA
25mA
AV
DD
LOAD
200µs/DIV
1610 TA19
V
ON
LOAD = 5mA
V
OFF
LOAD = 5mA