IRU3033

7

Rev. 1.7

07/17/02

www.irf.com

Ref Desig Description

Qty

Part #

Manuf

U1

LDO/Switcher IC

1

IRU3033CS (8-Pin SOIC)

IR

Q2

MOSFET

1

IRL3303 (TO-220)

IR

IRL3103S (TO-263) (Note 1)

D1

Schottky Diode

1

MBR1045CT (TO-220)

MBRB1545CT (TO-263) (Note1)

Motorola

L2

Inductor

1

Core: T50-18,L=4

mH

Micro Metal

Turns: 10T, 18 AWG

(core)

L1

Inductor

1

L=2

mH

R1A

Resistor

1

2.4K

V, 5%, SMT 1206 size

R1B

Resistor

1

22

V, 5%, SMT 1206 size

R2

Resistor

1

10

V, 5%, SMT 1206 size

R3

Resistor

1

249K

V, 1%, SMT 0805 size

R4

Resistor

1

1K

V, 1%, SMT 0805 size

R5

Resistor

1

576

V, 1%, SMT 0805 size

R6

Resistor

1

180

V, 1%, SMT 0805 size

R7

Resistor

1

100

V, 1%, SMT 0805 size

R9

Resistor

1

10

V, 5%, SMT 1206 size

R10

Resistor

1

1K

V, 5%, SMT 1206 size

R13

Resistor

1

7.5K

V, 5%, SMT 1206 size

C1, 2

Capacitor

2

6MV1500GX, 1500

mF, 6.3V, Elect

Sanyo

C3

Capacitor

1

1

mF, Ceramic, SMT 0805 size

C4

Capacitor

1

470pF, Ceramic, SMT 0805 size

Sanyo

C5

Capacitor

1

10pF, Ceramic, SMT 0805 size

Sanyo

C7

Capacitor

1

6MV1500GX, 1500uF, 6.3V, Elect

Sanyo

C8

Capacitor

1

1

mF, Ceramic, SMT 0805 size

C9

Capacitor

1

470pF, Ceramic, SMT 0805 size

HS1

Heat Sink

1

For MOSFET in Switching mode, 577002

Aavid

For MOSFET in Linear mode:

507222 (3.3V current<5A),

576602 (3.3V current< 3.5A)

HS2

Heat Sink

1

For Schottky Diode, 577002

Aavid

APPLICATION PARTS LIST

5V to 3.3V for Pentium Application with AGP or Pentium II Application without ATX power supply Dual

mode Operation between Switching or Linear mode.

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

for D2 in TO-263 packages with minimum of 1" square copper pad can be used.