US3010A Ver la hoja de datos (PDF) - Unisem

Número de pieza

componentes Descripción

Lista de partido

US3010A

5 BIT PROGRAMMABLE SYNCHRONOUS BUCK CONTROLLER IC

Unisem 

US3010/3010A

TYPICAL APPLICATION

SYNCHRONOUS OPERATION

(Dual Layout with SC1152)

L1

Q1

5V

L2

R8

C5

R2

C1

C3

R3

R4

R5

R7

R10

C7

R9

Q2

R6

C8

C10

C4

C6

12V

R1

C2

VID4

VID3

VID2

VID1

VID0

12

2

V12 V5

9 NC

13 SS/BstH

D4 D3

16

17

6

CS+

D2

18

8

5

HDrv CS-

US3010

D1 D0

19

20

11

10

LDrv Gnd

NC/ Ct/

PGndH AGnd

7

1

15

Vfb

En 14

PGd 4

OVP

3

R11 C9

R12

R13

C11

3010app1-1.1

OutEn

Power Good

OVP

Figure 2- Typical application of US3010/3010A 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 US3010A* and SC1152.

Part # R1 R2 R4 R7 R8

SC1152 S

O

O

V

V

US3010A* O

V

S

O

S

R9 R10 R11 C2 C5 C8 C9

V

V

S

O

O

V

O

O

O

O

V

V

O

V

S - Short

O - Open

V - See Unisem or Semtech parts list for the value.

* 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 SC1152.

4-6

Rev. 1.1

5/18/98

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