REV. A

ADP3421

–12–

VHYS

ADP3421

1

CLSET

2

LTO

3

LTI

4

LTB

5

VID4

6

VID3

7

VID2

8

VID1

9

VID0

10

CLKDRV

11

CLKFB

12

IODRV

13

IOFB

14

SD 15

PWRGD 16

UVLO 17

SSL 18

SSC 19

CORE 20

DACOUT 21

GND 22

OUT 23

VCC 24

RAMP 25

REG 26

CS+ 27

CS– 28

U1

R1

51.1k

R2

160k

3.3V

R10

10k

C2

100nF

C3

68 F

VRON

Q2

2N3906

C14

100 F

M1

IRF7811

D2

10BQ040

OVPSET

ADP3410

SD

GND

IN

DRVLSD

DLY

VCCGD

VCC

DRVL

PGND

SRMON

SW

DRVH

BST

U2

1

2

3

4

5

6

7

14

13

12

11

10

9

8

C20

10 F

Q1

MJD210

FROM

CPU

R11

220k

R12

470

k

C22

1nF

C21

1.5nF

C1

100nF

C31

1pF

R16

3.3k

C41

1pF

C29

100pF

R17

75k

R6

7.5k

R5

10

k

R18

576

C23

1nF

C25

22nF

R21,10

k

R19

2

k

R15

332

R22

100k

C18

10pF

C28

10 F

C17

100nF

5V

M2

IRF7811

R8

2.2

R9

2.2

M3

IRF7811

VIN

L1

1 H

D1

10BQ040

5m

C32

15nF

C10

10 F

C15

10 F

C16

10 F

C4–C6,

C11, C12,

C26, C27

220 F

7

VCC ON CORE SENSE

V GATE

VCC CPU IO

VCC CPU CLK

VCC

CPU

CORE

GND

R20

10

Figure 1. Mobile VRM Schematic

TYPICAL APPLICATION–GEYSERVILLE-ENABLED MOBILE VRM CONVERTER

OUTLINE DIMENSIONS

Dimensions shown in mm and (inches).

28-Lead Thin Shrink Small Outline Package (TSSOP)

(RU-28)

4.50 (0.177)

4.30 (0.169)

28

15

14

1

9.80 (0.386)

9.60 (0.378)

6.50 (0.256)

6.25 (0.246)

PIN 1

SEATING

PLANE

0.15 (0.006)

0.05 (0.002)

0.30 (0.012)

0.19 (0.008)

0.65 (0.026)

BSC

1.10 (0.043)

MAX

0.20 (0.008)

0.09 (0.004)

0.70 (0.028)

0.50 (0.020)

8

0

CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE

ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE

FOR USE IN DESIGN

Revision History

Location

Page

5/02—Data Sheet changed from REV. 0 to REV. A.

Changed Figures to TPCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Renumbered Figure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12