LTC3450 Datasheet, PDF (10/12 Pages) Linear Technology – Triple Output Power Supply for Small TFT-LCD Displays

LTC3450
APPLICATIO S I FOR ATIO
V3X
JUMPER
MODE
SHDN
V_NEG
V_OUT
V_IN
NOTE: QFN PACKAGE EXPOSED PAD
IS CONNECTED TO THE V_NEG PIN.
DO NOT CONNECT EXPOSED PAD TO GROUND
GND
3450 F03
Figure 3. Suggested Layout
TYPICAL APPLICATIO
5.1V, –15V, 15V Triple Output TFT-LCD Supply
V_IN
1.5V TO
4.6V
L1
47µH
C1
2.2µF
BLANK SCAN
OFF ON
8
7
6
SW
V_IN
V_OUT
C1
+
11
C1^{– 10}
4 _MODE
V2X ¹²
LTC3450 C2^{+ 14}
5
SHDN
C2^{– 13}
V3X ¹⁵
9 _GND
V_NEG
C3^– C3^{+VINV 16}
3 21
CF3
0.1µF
D1, D2: DUAL SCHOTTKY DIODE, PANASONIC MA704WKCT
L1: SUMIDA CMD4D08-470
C2
2.2µF
CF1
0.1µF
AV_DD
5.1V/10mA
C4
CF2
0.47µF
0.1µF
D1
VGH
15V/500µA
C6
D2
0.1µF
0.1µF
C5
0.1µF
VGL
–15V/500µA
3450 TA02
3450f
10