MIC2873

1.2A High-Brightness Flash LED Driver with

Single-Wire Serial Interface

General Description

The MIC2873 is a high-current, high-efficiency flash LED

driver. The LED driver current is generated by an

integrated inductive boost converter with a 2MHz switching

frequency which allows for the use of very small inductor

and output capacitor. These features make the MIC2873

an ideal solution for high-resolution camera phone LED

flash light driver applications.

MIC2873 operates in either flash or torch modes that can

be controlled through the single-wire serial interface and/or

external control pin. A robust single-wire serial interface

allows the host processor to control the LED current and

brightness. The MIC2873 is available in a 9-bump 1.30mm

× 1.30mm WLCSP package.

Datasheets and support documentation are available on

Micrel’s web site at: www.micrel.com.

Features

• Up to 1.2A flash LED driving current

• Highly-efficient synchronous boost driver

• Control through single-wire serial interface or external

control pin

• Input voltage range: 2.7V to 5.5V

• True load disconnect

• Configurable safety time-out protection

• Output overvoltage protection (OVP)

• LED short-circuitdetection and protection

• 1µA shutdown current

• Available in 9-bump 1.30mm × 1.30mm WLCSP

package

Applications

• Camera phones/mobile handsets

• Cell phones/smartphones

• LED light for image capture/auto focus/white balance

• Handset video light (torch light)

• Digital cameras

• Portable applications

Typical Application

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

July 17 2014

Revision 1.0