Micrel, Inc.

MIC2250

November 2008

2

M9999-111708-A

Ordering Information

Part Number

Marking

(1)

Junction Temp. Range

Package

(3)

Lead Finish

MIC2250YML

ZAA

(2)

–40° to +125°C

8-Pin 2mm x 2mm MLF

®

Pb-Free

Note:

1.

Pin 1 identifier = “

•”.

2.

Overbar (

) may not be to scale.

3.

MLF is GREEN RoHs compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.

Pin Configuration

8-Pin 2mm x 2mm MLF

(Top View)

Pin Description

Pin Number

Pin Name

Pin Function

1

FB

2

AGND

Analog Ground. Connect to power ground.

3

PGND

Power Ground.

4

SW

Switch Node (Input): Internal power NMOS drain.

5

NC

Not Internally Connected.

6

VIN

Supply (Input): 2.5V to 5.5V input voltage.

7

DITH

Frequency Dithering (Input): Connect this pin high to enable pseudo-random on-

time dithering to reduce EMI. Connect this pin-to-ground to disable this function.

8

EN

Enable (Input): Logic high enables the regulator. Logic low shuts down the

regulator. Do not leave floating.

EPAD

GND

Ground (Return): Exposed backside pad. Connect to power ground.