Micrel, Inc.

MIC2289C

August 2007

2

M9999-081507-B

Ordering Information

Part Number

Marking

Code

Overoltage

Protection

Junction

Temp. Range

Package

Lead Finish

MIC2289C-34BD6

SM34|

34V

–40°C to +125°C

6-Pin Thin SOT-23

Standard

MIC2289C-34YD6

SM34|

34V

–40°C to +125°C

6-Pin Thin SOT-23

Pb-Free

Note

: Marking bars may not be to scale.

Pin Configuration

FB GND

EN

VOUT

SW

3

1

6

2

4

SM34

Denotes

Pb-Free

Denotes

MIC2289C

5

VIN

6- Pin Thin SOT-23 (D6)

Pin Description

Pin Number

Pin Name

Pin Name

1

SW

Switch node (Input): Internal power BIPOLAR collector.

2

GND

Ground (Return): Ground.

3

FB

Feedback (Input): Output voltage sense node. Connect the cathode of the LED to

this pin. A resistor from this pin to ground sets the LED current.

4

EN

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

5

VIN

Supply (Input): 2.7V to 8V for internal circuitry.

6

OUT

Output Pin and Overvoltage Protection (Output): Connect to the output capacitor

and LEDs.