Micrel, Inc.

MIC2208

Ordering Information

Part Number

Output

Voltage

(1)

Junction Temp. Range

Package

Lead Finish

MIC2208YML

Adj.

–40° to +125°C

3mmx3mm MLF-10L

Pb-free

.

Pin Configuration

BIAS

EN

SW

VIN

PGND

SGND

SW

VIN

PGND

PGOOD

5

1

2

3

4

8

FB

COMP

67

12

11

10

9

EP

3mm x 3mm MLF-12 (ML)

Pin Description

Pin Number

Pin Name

Pin Function

1,12

SW

Switch (Output): Internal power P-Channel MOSFET output switch

2,11

VIN

Supply Voltage (Input): Supply voltage for the source of the internal P-channel

MOSFET and driver.

Requires bypass capacitor to GND.

3,10

PGND

Power Ground. Provides the ground return path for the high-side drive current.

4

SGND

Signal Ground. Provides return path for control circuitry and internal reference.

5

BIAS

Internal circuit bias supply. Must be bypassed with a 0.1uF ceramic capacitor to

SGND.

6

FB

Feedback. Input to the error amplifier, connect to the external resistor divider

network to set the output voltage.

7

COMP

Compensation. This is the internal error amplifier output. Connect external

compensation components for type II or type III compensation.

8

EN

Enable (Input). Logic level low will shutdown the device, reducing the current

draw to less than 5uA.

9

PGOOD

Power Good. Open drain output that is pulled to ground when the output voltage

is within +/- 7.5% of the set regulation voltage

EP

GND

Connect to ground.

September 2005

2

M9999-092905

www.micrel.com