US2075CM 参数 Datasheet PDF下载

US2075

TYPICAL APPLICATION

5V

C7

V5

7

Vo

6

Vhyst

5

C5

C8

R6A

L2

R3

Q2

R8B

R8C

C4

JP7

1

2

3

L1

Cache & Chip Set

CPU I / O

Core Supply

C6

U1

Gnd

4

Vfb

3

V12

2

Drv

1

2050ta3d

12V

C1

JP2

C3

R5

D2

R7A

R7B

R7C

R7D

R7E

JP3

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

JP4

0

0

1

1

0

0

1

1

0

0

1

1

0

0

1

1

JP5

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

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.

0

0

0

0

0

0

0

0

1

1

1

1

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

U1

Q2

D2

L2

L1

R3

R5

R8C

R8B

R7A

R7B

R7C

R7D

R7E

R6A

C8

C1

C7

C3

C4

C5

C6

HS1

HS2

HS3

Description

LDO/Switcher IC

MOSFET

Schottky Diode

Inductor

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

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

4

1

1

1

Part #

US2075CT (TO220)

US2075CM (TO263) (note 1)

IRL3303 (TO220)

IRL3103S (TO263) (note 1)

MBR1045CT (TO220)

MBRB1545CT (TO263) (note1)

Core:T50-18,L=4 uH

Turns: 10T, 18 AWG

L=2 uH

22 ohm,5%, SMT 1206 size

10 ohm, 5%, SMT 1206 size

806 ohm,1%, SMT 0805 size

90.9 kohm,1%, SMT 0805 size

1.24 kohm,1%, SMT 0805 size

2.49 kohm,1%, SMT 0805 size

4.99 kohm,1%, SMT 0805 size

10 kohm,1%, SMT 0805 size

1.30 kohm,1%, SMT 0805 size

324 kohm,1%, SMT 0805 size

10pF,Ceramic, SMT 0805 size

1 uF,Ceramic, SMT 0805 size, Z5U

EEUFA1A681L, 680uF,10V, Elect

470pF,Ceramic, SMT 0805 size

6MV1500GX, 1500uF,6.3V, Elect

EEUFA1A681L, 680uF,10V, Elect

6MV1500GX, 1500uF,6.3V, Elect

For MOSFET , 577002

For Schottky Diode , 577002

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