iru3033 International Rectifier Corp., iru3033 Datasheet - Page 4

• Manufacturer Part Number: iru3033
• Description: 8-pin Pwm Switcher And Linear Controller Ic
• Manufacturer: International Rectifier Corp.

IRU3033
TYPICAL APPLICATION
Pentium Dual Supply Application
Figure 3 - Typical application of IRU3033 in a flexible motherboard with the 4-bit VID output voltage selection. This
circuit uses a single jumper that programs the output voltage in 16 steps with 0.1V steps from 2V to 3.5V, designed
for Intel P55 ,P54 , AMD K5 & K6
cally shuts down the I/O regulator when a single plane processor is dropped in the socket.
4
12V
5V
L1
R9
C8
R1
C2
Q2
C1
R10
Drv1
V
C4
R2
12(SW)
V
12
C3
Drv2
U1
V
Q1
D1
FB1
R11
V
V
JP1
as well as Cyrix M1
HYST
FB2
Gnd
JP1
1-2
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
R5A
R3
R13
1
2
JP1
3-4
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
C9
R5B
C5
www.irf.com
JP1
3
4
5-6
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
D2
R5C
JP1
7-8
5
6
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
and M2
L2
R5D
Voltage
Output
R6
R7
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
7
8
R5E
R4
applications. The Vcc2 Det pin automati-
0 = Jumper block is installed.
1 = Jumper block is not installed.
R8
C6
5V
C7
Vcc2 Det
Core
I/O
CPU
07/17/02
Rev. 1.7