TPS6734I

FIXED 12-V 120-mA BOOST-CONVERTER SUPPLY

SLVS127A – AUGUST 1995 – REVISED JANUARY 1999

14

POST OFFICE BOX 655303

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.

VCC

FB

OUT

GND

EN

REF

SS

COMP

1

2

3

4

8

7

6

5

TPS6734

VI

ENABLE

+

33

µF, 20 V

L1

18

µH

SS12

1

2

3

4

VO

VO

GND

GND

C5

D1

U1

C4 0.001

µF

+

C1

C3

0.047

µF

C2

0.01

µF

R1

10 k

Ω

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