US3034

4-5

Rev. 1.8

1/13/99

Ref Desig

Description

Qty

Part #

Manufacturer

U1

LDO/Switcher IC

1

US3034CS ( 8 pin SOIC)

Unisem

Q2

MOSFET

1

IRL3303 (TO220)

International

IRL3103S (TO263)

(note 1)

Rectifier

D1

Schottky Diode

1

MBR1045CT (TO220)

MBRB1545CT (TO263) (note1)

Motorola

L2

Inductor

1

Core:T50-18,L=4 uH

Micro Metal

Turns: 10T, 18 AWG

(core)

L1

Inductor

1

L=2 uH

R1

Resistor

1

22 ohm,5%, SMT 1206 size

R2

Resistor

1

10 ohm, 5%, SMT 1206 size

R3

Resistor

1

324 kohm,1%, SMT 0805 size

R4A *

Resistor

1

806 ohm,1%, SMT 0805 size

R4B *

Resistor

1

90.9 kohm,1%, SMT 0805 size

R5A

Resistor

1

1.24 kohm,1%, SMT 0805 size

R5B

Resistor

1

2.49 kohm,1%, SMT 0805 size

R5C

Resistor

1

4.99 kohm,1%, SMT 0805 size

R5D

Resistor

1

10 kohm,1%, SMT 0805 size

R5E

Resistor

1

1.30 kohm,1%, SMT 0805 size

R6

Resistor

1

5 miliohm,5%, 2W

R7

Resistor

1

4.99 kohm,1%, SMT 0805 size

R8

Resistor

1

4.7 kohm,5% for US3034, open for 3033

R9

Resistor

1

open for US3034, 10 ohm for US3033

C1

Capacitor

1

6MV1500GX, 1500uF,6.3V, Elect

C2

Capacitor

1

6MV1500GX, 1500uF,6.3V, Elect

Sanyo

C3

Capacitor

1

1 uF,Ceramic, SMT 0805 size

C4

Capacitor

1

470 pF,Ceramic, SMT 0805 size

Sanyo

C5

Capacitor

1

10 pF,Ceramic, SMT 0805 size

Sanyo

C7

Capacitor

4

6MV1500GX, 1500uF,6.3V, Elect

Sanyo

C8

Capacitor

1

0.047 uF for 3034 , 0.1uf for 3033

C6

Capacitor

1

4700pF for US3034, open for US3033

HS1

Heat Sink

1

For MOSFET , 577002

Aavid

HS2

Heat Sink

1

For Schottky Diode , 577002

Aavid

* R4 is a parallel combination of R4A and R4B.

Note 1: For the applications where it is desirable to eliminate the heat sink, the IRL3103S for Q2 and MBR1545CT for D2 in TO263

packages with minimum of 1" square copper pad can be used.

Pentium Core Supply Application Parts List (US3034 and US3033 Dual Layout)

Low Cost 4 Bit VID