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