Micrel Inc.

MIC33153

September 2010

2

M9999-092910-A

Ordering Information

Part Number

1

Marking Code

Nominal Output

Voltage

Junction Temperature

Range

Package

2

MIC33153-4YHJ

−4

33153

1.2V

–40°C to +125°C

14-pin 3.0 x 3.5 x 1.1mm MLF

®

MIC33153YHJ

MIC

33153

Adjustable

–40°C to +125°C

14-pin 3.0 x 3.5 x 1.1mm MLF

®

Notes:

1.

Other options available (1V - 3.3V). Contact Micrel Marketing for details.

2.

MLF

Pin Configuration

14- Pin 3.0mm x 3.5mm MLF

Fixed Output Voltage

(Top View)

14- Pin 3.0mm x 3.5mm MLF

Adjustable Output Voltage

(Top View)

Pin Description

Pin

Number

(Fixed)

Pin

Number

(Adjustable)

Pin

Name

Pin Function

1

1

SS

Soft Start: Place a capacitor from this pin to ground to program the soft start time.

2

2

AGND

Analog Ground: Connect to central ground point where all high current paths meet

3

3

VIN

Input Voltage: Connect a capacitor to ground to decouple the noise.

4

4

PGND

Power Ground.

5,6,7

5,6,7

OUT

Output Voltage: The output of the regulator. Connect to SNS pin. For adjustable option,

connect to feedback resistor network.

8,9,10

8,9,10

SW

Switch: Internal power MOSFET output switches before Inductor

11

11

EN

Enable: Logic high enables operation of the regulator. Logic low will shut down the device.

Do not leave floating.

12

12

SNS

13

13

PG

Power Good: Open drain output for the Power Good (PG) indicator. Use a pull up resistor

from this pin to a voltage source to detect a power good condition.

14

−

NC

Not Internally Connected.

−

14

FB

Feedback: Connect a resistor divider from the output to ground to set the output voltage.