General Description
The AP3606 and AP3607 are step-up DC-DC converters based on 1x/1.5x charge pump and low dropout current sink, which helps them maintain the highest efficiency. The AP3606 is specially designed to drive up to 4 WLEDs in backlight display while the AP3607 is designed for 6 WLEDs.

FEATUREs
•  Regulated Output Current with ±3% Matching
•  Drives up to 4 WLEDs at 20mA Each (AP3606) 
   Drives up to 6 WLEDs at 20mA Each (AP3607)
•  16 Steps Brightness Control Using Pulse Signal Dimming
•  Wide Operating Voltage Range: 2.7V to 5.5V  
•  High Operating Frequency: 1MHz
•  Auto 1x/1.5x Charge Pump Mode Selection
• Built-in Soft-start
• Output Over Voltage Protection
• Built-in UVLO
• Built-in OTSD
•  Operating Temperature Range: -40°C to 85°C

APPLICATIONs
•  Mobile Phone
• PDA
• MP3/4