MIC2204

Micrel, Inc.

M9999-042205

2

April 2005

Ordering Information

Part Number

Voltage

Junction Temp. Range

Package

Lead Finish

MIC2204BMM

Adjustable

–40°C to +125°C

10-pin MSOP

Standard

MIC2204YMM

Adjustable

–40°C to +125°C

10-pin MSOP

Lead-Free

MIC2204BML

Adjustable

–40°C to +125°C

10-pin MLF™

Standard

MIC2204YML

Adjustable

–40°C to +125°C

10-pin MLF™

Lead-Free

EN

FB

6

5

1

SW

VIN

SYNC_IN

SYNC_OUT

10 GND

GND

GND

BIAS

9

8

7

2

3

4

MSOP-10 (MM)

Pin Configuration

Pin Description

Pin Number

Pin Name

Pin Function

1SW

Switch (Output): Internal power MOSFET output switches.

2

VIN

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

3

SYNC_IN

SYNC_IN for the MIC2204: Sync the main switching frequency to an

external clock. Tie pin to ground if not using this function. Tying SYNC_IN

high reduces the switching frequency to 1.6MHz (See “Applications Informa-

tion” section).

4

SYNC_OUT

SYNC_OUT an open collector output to feed into SYNC_IN. Float or ground

the SYNC_OUT pin if not using sync out function.

5ENA low level EN will power down the device, reducing the quiescent current to

under 15µA (typ. 6.5µA).

6FB

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 with a 0.01µF capacitor.

8, 9, 10

GND

Ground.

SW

VIN

SYNC_IN

SYNC_OUT

GND

GND

GND

BIAS

1

2

3

4

10

9

8

7

56

EN

FB

MLF-10 (ML)