Micrel, Inc.

MIC2203

Ordering Information

Part Number

Standard

Pb-Free

Output Voltage

Junction Temperature

Range

Package

MIC2203BMM

MIC2203YMM

Adjustable

-40°C to +125°C

MSOP-10L

MIC2203BML

MIC2203YML

Adjustable

-40°C to +125°C

3mm x 3mm MLF-10L

Pin Configuration

MSOP-10 (MM)

MLF-10 (ML)

Top View

Pin Description

Pin Number

Pin Name

Pin Function

1

SW

Switch (Output): Internal power MOSFET output switches.

2

VIN

Supply Voltage (Input): Requires a bypass capacitor to GND.

3

SYNC_IN

SYNC_IN for the MIC2203, Sync the main switching frequency to a external

clock. Should be tied to ground when not in use.

4

SYNC_OUT

SYNC_OUT a 50ns wide sync pulse to feed into SYNC_IN on MIC2203.

Can be left open or tied to ground when not used.

5

EN

A low level EN will power down the device, reducing the quiescent current to

under 1

µA.

6

FB

Input to the error amplifier, connect to the external resistor divider network to set

the output voltage.

7

BIAS

Internal circuit bias supply, nominally 2.3V. Must be de-coupled to signal ground

and can have a minimum of external DC loading.

8,9,10

GND

Ground

EP

GND

Exposed backside pad, connect to Ground (MLF option only)

December 2004

2

M9999-120604

(408) 955-1690