Description
19-3978; Rev 3; 12/06 KIT ATION EVALU E L B AVAILA 1x/1.5x/2x White LED Charge Pumps with Two LDOs in 4mm x 4mm TQFN General .
The MAX8645X/MAX8645Y charge pumps drive up to eight white LEDs with regulated constant current for uniform intensity.
Features
* Power Up to Eight LEDs Up to 30mA/LED Drive for Backlight Up to 400mA Total Drive for Flash
* Two Internal Low-Noise 200mA LDOs
* 94% Max/85% Avg Efficiency (PLED/PBATT) over Li+ Battery Discharge
* 0.2% Typical LED Current Matching
* Adaptive 1x/1.5x/2x Mod
Applications
* www. DataSheet4U. com
Camera Phones and Smartphones Backlighting and Flash PDAs, Digital Cameras, and Camcorders
Typical Operating Circuit
1μF INPUT 2.7V TO 5.5V 1μF OUTPUT UP TO 580mA 10μF MAX8645X MAX8645Y MAIN FLASH
Ordering Information
PART TEMP RANGE -40°C to +85°C -40°C to +85°C PINPACKAGE 28