參數(shù)資料
型號(hào): US3012ACW
廠商: Unisem Group
英文描述: 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC
中文描述: 5位可編程同步降壓控制器芯片
文件頁(yè)數(shù): 6/11頁(yè)
文件大小: 75K
代理商: US3012ACW
4-6
Rev. 1.0
5/6/98
US3012/3012A
TYPICAL APPLICATION
SYNCHRONOUS OPERATION
(Dual Layout with RC5051)
Typical application of US3012/3012A 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 US3012A* and RC5051.
Part #
RC5051
US3012A* S
R1
V
R2
O
V
R4
O
S
R7
V
O
R8
V
S
R9
V
O
R10
O
V
R11
S
O
C2
V
V
C5
O
V
C8
V
V
D1
V
O
S - Short
* 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 RC5051.
O - Open
V - See Unisem or Raytheon parts list for the value.
5V
12V
VID0
Power Good
3012app1-1.1
OutEn
Q2
VID1
VID2
VID3
VID4
L1
L2
C5
R2
C3
C4
C6
Q1
R3
R5
C7
R6
C11
C1
R7
C8
C2
R4
R9
R8
R12
R13
4
HDrv
LDrv
NC/Vccp
SS/Vref
CS+
Gnd
Vfb/
GndD
D3
17
D2
18
D4
8
D1
19
D0
20
US3012
En
PGd
CS-
V12
V5
12
5
9
15
10
11
14
1
3
2
16
7
13
6
NC/
GndA
NC/
GndP
Ct
R1
D1
R10
R11
C9
C10
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