US3004,US3005
TYPICAL APPLICATION
Pentium III
L1
L2
Q1
5V
Vout 3
R16
R17
C16
C5
R1
C7
R4
Q2
C13
C3
C4
C10
R2
R3
R12
R13
3.3V
12V
C6
Q3
Vout 1
C11
12
V12
5
V5
8
9
7
CS-
11
10
Gnd
14
Vfb3
R18
R7
R8
CS+ HDrv
LDrv
R11
C15
1 Ct
Lin1 2
C1
US3004
13 SS
Vfb1 3
Lin2
20
Q4
C2
Vout 2
D4
15
D3
16
D2
17
D1
18
D0
19
PGd
6
Vfb2
4
C9
C12
R14
VID4
3004app2-2.0
VID3
VID2
VID1
VID0
R9
3.3V
C14
R15
R5
Power Good
C8
Figure 2- Typical application of US3004 or 3005 in an on board DC-DC converter providing the Core ,
GTL+, and Clock supplies for the Pentium II microprocessor.
PART #
US3004
US3005
R7 VALUE
SEE PARTS LIST
SHORT
R8 VALUE
SEE PARTS LIST
OPEN
Table2, describing the differences between 3004 and 3005 applications.
Rev. 1.2
12/8/00
4-6
UNISEM [ UNISEM ]
