Datasheet

TPS6734I
FIXED 12-V 120-mA BOOST-CONVERTER SUPPLY
SLVS127A – AUGUST 1995 – REVISED JANUARY 1999
14
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
TPS6734 converter design with recommended layout
The following schematic (Figure 13) and a required-components table are provided for a 12-V-output boost
converter. The converter is capable of delivering 120 mA of output current over an input voltage range of 3.75 V
to 12 V. Recommended layout and detailed artwork for a PCB are provided in Figures 14 through 17.
NOTE A: A jumper between pins P1-3 and P1-4 shuts off the TPS7634. Remove the jumper to resume normal operation.
V
CC
FB
OUT
GND
EN
REF
SS
COMP
1
2
3
4
8
7
6
5
TPS6734
V
I
ENABLE
+
33 µF, 20 V
L1
18 µH
SS12
1
2
3
4
V
O
V
O
GND
GND
C5
D1
U1
C4 0.001 µF
+
C1
C3
0.047 µF
C2
0.01 µF
R1
10 kΩ
1
2
3
4
GND
GND
33 µF, 20 V
P1
P2
Figure 13. Schematic for Printed Circuit Board (shown in Figures 14 through 17)
Required Components
QTY. DESCRIPTION REF DES
MANUFACTURER’S
PART NO.
MANUFACTURER
1 IC, power supply, 12 V for flash memory U1 TPS6734ID Texas Instruments
1 Diode, Schottky D1 SS12 General Instruments
1 Inductor, 18 µH, 150 mΩ, 1.23 A(DC) L1 CD54180MC Sumida
2 Capacitor, 33 µF, 20 V, tantalum C1,5 TAPSD336M020R0200 AVX
1 Capacitor, 0.01 µF, 50 V, ceramic, 0805 C2
1 Capacitor, 0.047 µF, 50 V, ceramic, 1206 C3
1 Capacitor, 0.001 µF, 50 V, ceramic, 0805 C4
2 Connector, header, 4-pin P1,2 Molex
1 PCB, TPS6734