US3033 查看數據表（PDF） - Unisem
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US3033 Datasheet PDF : 9 Pages
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US3033
TYPICAL APPLICATION
Pentium Dual Supply Application
Q1
5V
C1
12V
R10
R11 R13 C9
R6
R9
C8 8 7 6 5
V12 Drv2 Vfb2 Gnd
U1
Drv1V12swVfb1 Vhyst
1234
D2
R7
C3
R1
R3
C5
L2
L1
Q2
C2
C4
R2 D1
R4
R5A R5B R5C R5D R5E
JP1 1
3
5
7
2
4
6
8
I/O
C6
CPU
5V
R8
Vcc2 Det
Core
C7
3033app2-1.3
Figure2- Typical application of US3033 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™ as well as Cyrix M1™ and M2™ applications. The Vcc2Det pin automatically shuts down the I/O regulator when a single plane
processor is dropped in the socket.
JP1 JP1 JP1 JP1 Output
1-2 3-4 5-6 7-8 Voltage
00
0
0
3.5
00
0
1
3.4
00
1
0
3.3
00
1
1
3.2
01
0
0
3.1
01
0
1
3.0
01
1
0
2.9
01
1
1
2.8
10
0
0
2.7
10
0
1
2.6
10
1
0
2.5
10
1
1
2.4
11
0
0
2.3
11
0
1
2.2
11
1
0
2.1
11
1
1
2.0
0 = Jumper block is installed.
1 = Jumper block is not installed.
4-4
Rev. 1.5
1/14/99
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