US2075 查看數據表（PDF） - Unisem
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US2075 Datasheet PDF : 4 Pages
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US2075
TYPICAL APPLICATION
L1
5V
C7
V5 7
Vo 6
Vhyst 5
U1
Gnd 4
C8 R6A
Vfb 3
L2
V12 2
R3
Drv 1
C4
Q2
2050ta3d
12V
C1
R8B R8C
C3
R5 D2
R7A R7B R7C R7D R7E
JP2 JP3 JP4 JP5
Figure2- Typical application of US2075 in a
flexible motherboard with the 4 bit VID output voltage selection.
This circuit uses a single jumper that programs the output volt-
age 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 jumper JP7 selects between single sup-
ply and dual supply processors.
C5 1
JP7 2
3
Cache & Chip Set
CPU I / O
Core Supply
C6
JP2
JP3
JP4
JP5
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
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
Ref Desig Description
U1
LDO/Switcher IC
Q2
MOSFET
D2
Schottky Diode
L2
Inductor
L1
R3
R5
R8C
R8B
R7A
R7B
R7C
R7D
R7E
R6A
C8
C1
C7
C3
C4
C5
C6
HS1
HS2
HS3
Inductor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Heat Sink
Heat Sink
Heat Sink
Qty
Part #
1 US2075CT (TO220)
US2075CM (TO263) (note 1)
1 IRL3303 (TO220)
IRL3103S (TO263) (note 1)
1 MBR1045CT (TO220)
MBRB1545CT (TO263) (note1)
1 Core:T50-18,L=4 uH
Turns: 10T, 18 AWG
1 L=2 uH
1 22 ohm,5%, SMT 1206 size
1 10 ohm, 5%, SMT 1206 size
1 806 ohm,1%, SMT 0805 size
1 90.9 kohm,1%, SMT 0805 size
1 1.24 kohm,1%, SMT 0805 size
1 2.49 kohm,1%, SMT 0805 size
1 4.99 kohm,1%, SMT 0805 size
1 10 kohm,1%, SMT 0805 size
1 1.30 kohm,1%, SMT 0805 size
1 324 kohm,1%, SMT 0805 size
1 10pF,Ceramic, SMT 0805 size
1 1 uF,Ceramic, SMT 0805 size, Z5U
1 EEUFA1A681L, 680uF,10V, Elect
1 470pF,Ceramic, SMT 0805 size
1 6MV1500GX, 1500uF,6.3V, Elect
1 EEUFA1A681L, 680uF,10V, Elect
4 6MV1500GX, 1500uF,6.3V, Elect
1 For MOSFET , 577002
1 For Schottky Diode , 577002
1 For US2075 , 507222 (I/O Load Current<5A)
576602 (I/O Load Current< 3.5A)
Manufacturer
Unisem
International
Rectifier
Motorola
Micro Metal
(core)
Panasonic
Sanyo
Panasonic
Sanyo
Aavid
Aavid
Aavid
Note 1: For the applications where it is desirable to eliminate the heat sink, the US2075CM for U1 when load current is
less than 1.5A, the IRL3103S for Q2 and MBR1545CT for D1 in TO263 packages with minimum of 1" square copper pad
can be used.
4-4
Rev. 1.2
4/26/98
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