Micrel, Inc.

MIC2253

April 2011

2

M9999-042011-C

Ordering Information

Part Number

Marking

Code

(2)

OVP

Junction Temp. Range

Package

Lead Finish

MIC2253-06YML

06

2253

6V

–40° to +125°C

12-Pin 3x3 MLF

®

Pb-Free

Note:

MLF

Pin Configuration

12-Pin 3mm x 3mm MLF

®

(ML)

(Top View)

Pin Description

Pin Number

Pin Name

Pin Function

1

NC

No connect. Not internally connected.

2

SS

Soft start (Input). Connect a capacitor to GND to slowly turn on the device. The

higher the capacitance, the longer the turn-on time.

3

FB

Feedback (Input): Output voltage sense node. Connect external resistors to set

the output voltage. Nominal feedback voltage is 1.245V.

4

AGND

Analog Ground

5,6

PGND

Power Ground

7,8

SW

Switch Node: Internal power BIPOLAR collector.

9

OVP

Over-Voltage Protection (OVP): Connect to the output voltage to clamp the

maximum output voltage. A resistor divider from this pin to ground could be

used to raise the OVP level beyond 6V (max).

10

VIN

Supply (Input): 2.5V to 10V for internal circuitry.

11

EN

Enable (Input): Applying 1.5V or greater enables the regulator. Applying a

voltage of 0.4V or less disables the MIC2253. Do not leave floating.

12

COMP

Compensation pin (Input): Add external R and C to GND to stabilize the

converter.

EP

HS Pad

Exposed Heat-Sink pad.