Micrel, Inc.

MIC2873

Ordering Information

Part Number

Marking Code

Operating Ambient Temperature

Range

Package

(1)

MIC2873YCS

73A

–40°C to +85°C

9-Bump 1.30mm × 1.30mm WLCSP

Note:

1.

WLCSP bump A1 identifier = “

•”.

Pin Configuration

9-Bump 1.30mm x 1.30mm WLCSP (CS)

(Top View)

Pin Description

Pin Number

Pin Name

Pin Function

A1

LED

LED Current Sink Pin. Connect the LED anode to OUT and cathode to this pin.

A2

DC

Single-wire interface serial control input.

A3

OUT

Boost converter output pin to be connected to the anode of the LED. Connect a low-ESR ceramic

capacitor of at least 4.7µF to PGND.

B1

LGND

Linear Ground. LED current return path.

B2

FEN

Flash Mode Enable Pin. Asserting this pin high enables MIC2873 into the flash mode. If this pin is

left floating, it is pulled-down internally by a built-in 1µA current source when the device is

enabled.

B3

SW

Inductor Connection Pin. It is connected to the internal power MOSFETs.

C1

AGND

Analog Ground.

C2

VIN

Supply Input Pin. Connect a low-ESR ceramic capacitor of at least 4.7µF to AGND.

C3

PGND

Power Ground. Inductor current return path.

July 17, 2014

2

Revision 1.0