US3010/3010A
TYPICAL APPLICATION
SYNCHRONOUS OPERATION
(Dual Layout with SC1152)
L1
L2
Q1
C5
C1
C3
R3
R5
Q2
R6
R2
R4
C7
R9
C8
C10
R7
R8
R10
5V
C4
C6
12V
R12
R13
R1
12
V12
9 NC
2
V5
6
CS+
8
HDrv
5
CS-
11
LDrv
10
Gnd
15
Vfb
En 14
OutEn
Power Good
C11
US3010
13 SS/BstH
C2
D4
16
D3
17
D2
18
D1
19
D0
20
NC/
Ct/
PGndH AGnd
7
1
PGd 4
OVP
3
VID4
VID3
VID2
VID1
VID0
R11
C9
OVP
3010app1-1.1
Figure 2- Typical application of US3010/3010A in an on board DC-DC converter providing the Core supply for the
Pentium II microprocessor.
Table of components that need to be modified to make the dual layout work for US3010A* and SC1152.
Part #
R1
SC1152
S
US3010A* O
R2
O
V
R4
O
S
R7
V
O
R8
V
S
R9
V
O
R10
V
O
R11
S
O
C2
O
V
C5
O
V
C8
V
O
C9
O
V
S - Short
O - Open
V - See Unisem or Semtech parts list for the value.
* Table also applies to the none "A" version of the part.
Note 1 : R8 can be replaced with shorting wire of #20 AWG or lower.
This elliminates the expensive current
sense resistor that otherwise is needed with SC1152.
4-6
Rev. 1.1
5/18/98
UNISEM [ UNISEM ]
