Micrel, Inc.

MIC22200

December 2010

2

M9999-120310-C

Ordering Information

Part Number

Nominal Output Voltage

Junction Temperature Range

(1)

Package

Lead Finish

MIC22200YML

Adjustable

−40°C to +125°C

3mm × 3mm 12-Pin MLF

®

Lead Free

(1)

Note

:

MLF

Pin Configuration

12-Pin MLF

Pin Description

Pin Number

Pin Name

Pin Function

1

POR

Power-On-Reset (output): Open drain output device indicates when the output is out of regulation

and is active after the delay set by the DELAY pin.

2

RC

Ramp Control. Capacitor to GND from this pin determines the slew rate of output voltage during

start-up. This can be used for tracking capability as well as for soft start.

3

CF

External capacitor to adjust switching frequency.

4

SGND

Signal Ground (signal): Ground (GND)

5

COMP

Compensation Pin (input): Placing an RC to GND will compensate the device. See Applications

section.

6

FB

Feedback (input): Input to the error amplifier; connected to the external resistor divider network to

set the output voltage.

7

SVIN

Signal Power Supply Voltage (input): Requires bypass capacitor to GND.

8

PVIN

Power Supply Voltage (input): Requires bypass capacitor to GND.

9

SW

Switch (output): From internal power MOSFET output switches.

10

PGND

Power Ground (power): Ground (GND)

11

DELAY

Delay (input)

12

EN/DLY

Enable (Input): When this pin is pulled higher than the enable threshold, the part will start up.

Below this voltage the device is in its low quiescent current mode. The pin has a 1µA current

source charging it to VIN. By adding a capacitor to this pin a delay may easily be generated. The

enable function will not operate with an input voltage lower than the min specified.

ePad

GND

Exposed Pad (Power): You must make a full connection to a GND plane for full output power to be

released.