US3033 UNISEM, US3033 Datasheet - Page 4

• Manufacturer Part Number: US3033
• Description: PWM SWITCHER & LINEAR CONTROLLER IC
• Manufacturer: UNISEM

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