March 2005

32

M9999-033105

MIC2591B

Micrel

*POWER MOSFET

(SO-8)

*SENSE RESISTOR

W

W

Current Flow

to the Load

Current Flow

to the Load

W

Current Flow

from the Load

Via to GND Plane

Via to signal plane

(GATE pin connection)

**R4

15

**C

GS

**C

MILLER

- DRAWING IS NOT TO SCALE AND NOT ALL PINS SHOWN FOR CLARITY-

*See Table 4 for part numbers and vendors

**Optional components

***Recommended components (variable in value, see Functional Description and Applications Information)

Trace width (W) guidelines given in "PCB Layout Recommendations" section of the datasheet

12V(Slot B) is illustrated in this example. A similar layout is suggested for the 3V supply and both slots

17

GND

C1

0.1uF

D

D

D

D

Via to signal plane

(GATE pin connection)

Via to GND Plane

***C

FILTER

S

S

S

G

Figure 15. Suggested PCB Layout for Sense Resistor, Power MOSFET, and Capacitors