Micrel, Inc.

MIC22400

June 2011

2

M9999-061511-F

Ordering Information

Part Number

Voltage

Junction Temperature Range

Package

Lead Finish

MIC22400YML

Adjustable

–40° to +125°C

20-Pin 3x4 MLF

Pb-Free

MIC22400YTSE**

Adjustable

–40° to +125°C

20-Pin e-TSSOP

Pb-Free

Notes:

*

MLF is a Green RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.

**

Contact Micrel Marketing for YTSE availability.

Pin Configuration

20-Pin 3mm x 4mm MLF

20-Pin e-TSSOP (TS)

Pin Description

Pin Number

MLF-20

Pin Number

e-TSSOP-20

Pin Name

Description

1

4

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

5

CF

Adjustable frequency with external capacitor. Refer to table on page 12.

3, 5, 9

7, 12, 19

NC

Not connected internally.

4

6

COMP

Compensation pin (Input): Place a RC to GND to compensate the device, see

applications section.

6

8

FB

Feedback (Input): Input to the error amplifier, connect to the external resistor

divider network to set the output voltage.

7

9

SGND

Signal Ground (Signal): Ground

8

10

SVIN

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

10, 17

11, 20

PVIN

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

11, 16

13, 18

PGND

Power Ground (Signal): Ground

12, 13, 14, 15

14, 15, 16, 17

SW

Switch (Output): Internal power MOSFET output switches.