Description
The AP3605 is a step-up DC/DC converter based on 1.5x charge pump current source, it is specially designed for LED supplies in backlight display.
   
Features
• Regulated Output Current with ±3% Matching
• Regulated ±10% Output Current Source
• Drive up to 4 LEDs at 20 mA Each
• Wide Operating Voltage Range: 2.7V to 5.5V
• High Efficiency up to 93%
• High Operating Frequency: 1MHz
• Built-in Soft-Start to Limit the Inrush Current
• LED Brightness Control through PWM and Analog
    Signal
• Built-in Standby Mode to Make PWM Dimming
    Control Optimized
• Built-in OTSD (Over Temperature Shutdown)
    Function to Protect the Device from Burn Out
   
Applications
• Mobile Phone
• MP3, MP4
• White LED Backlight in Mobile Phone, PDA