Micrel, Inc.

MIC3291

September 2010

2

M9999-092810

(408) 944-0800

Ordering Information

Part Number

1

Marking Code

4

Output Voltage

Over-Voltage

Protection

Junction

Temperature Range

Package

2,3

MIC3291-18YD6

W18F

Adjustable

18V

−40°C to +125°C

TSOT23-6

MIC3291-25YD6

W25F

Adjustable

25V

−40°C to +125°C

TSOT23-6

MIC3291-18YML

F

WA

Adjustable

18V

−40°C to +125°C

2mm

MIC3291-25YML

Adjustable

25V

−40°C to +125°C

2mm

F

WB

Notes:

1.

Other options available. Contact Micrel Marketing for details.

2.

MLF

3.

MLF

®

4.

Overbar ( ¯ )and Underbar symbols ( _ ) may not be to scale.

Pin Configuration

2mm × 2mm 8-Pin MLF

(Top View)

TSOT23-6 (D6)

(Top View)

Pin Description

Pin Number

8-pin MLF

®

Pin Number

SOT23-6

Pin Name

Pin Name

1

6

OUT

Output and over-voltage protection (output)

2

5

VIN

Supply (Input): 2.5V to 6.5V for internal circuitry.

3

4

DC

Single pin digital control. See diagrams.

4

−

GND

Ground (Return): Ground.

5

−

NC

No connect (no internal connection to die)

6

3

FB

Feedback (Input): Output voltage sense node. Connect the cathode of the LED

to this pin.

7

1

SW

Switch Node (Input): Internal power BIPOLAR collector.

8

2

GND

Ground (Return): Ground.

Pad

−

GND

Ground (Return): Backside pad.