US3010/3010A
TYPICAL APPLICATION
SYNCHRONOUS OPERATION
(Dual Layout with SC1152)
L1
L2
R8
Q1
5V
C5
R2
R4
R7
R10
C1
C7
R6
R9
C8
C3
C4
Q2
C10
R3
R5
C6
12V
R12
R13
12
V12
2
V5
6
CS+
8
HDrv
5
CS-
11
LDrv
10
Gnd
15
Vfb
R1
9 NC
En 14
OutEn
US3010
13 SS/BstH
PGd 4
Power Good
NC/
Ct/
C11
D4
16
D3
17
D2
18
D1
19
D0 PGndH AGnd OVP
C2
20
7
1
3
OVP
VID4
VID3
VID2
VID1
VID0
3010app1-1.1
R11
C9
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 #
SC1152
R1
S
R2
O
R4
O
R7
V
R8
V
R9
V
R10
V
R11
S
C2
O
C5
O
C8
V
C9
O
US3010A* O
V
S
O
S
O
O
O
V
V
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.
Rev. 1.1
5/18/98
4-6
UNISEM [ UNISEM ]
