Diodes Incorporated
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AP3606 (Not Recommended for new design)

NRND = Not Recommended for New Design

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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 W°Cs in backlight display while the AP3607 is designed for 6 W°Cs. These devices provide up to 20mA current for each W°C. There are totally 16 steps of current control, which is achieved through a digital pulse dimming function on EN pin. Additionally, 1MHz high switching frequency enables the use of small external capacitors. Internal soft-start circuitry prevents excessive inrush current during start-up and mode transition. The supply voltage ranges of AP3606 and AP3607 are from 2.7V to 5.5V which make them ideally suit for applications powered by Li-ion battery. These ICs are available in the tiny package of QFN-3Ω3-16.


  • Mobile Phone
  • PDA
  • MP3/4

Product Specifications

Product Parameters

Dimming Digital PWM
Efficiency (%) 89
Function Charge Pump LED Driver
MaximumInput Voltage (V) 5.5
Maximum Output Current per Channel 20
Maximum Output Voltage (V) 5.5
MinimumInput Voltage (V) 2.7
Number of Regulated Output Channels 4
OperatingTemperatureRange  (°C) -40 to 85
Quiescent Current (µA) 1.7
Soft Start Yes
Standby Quiescent Current (µA) 3
Switching Frequency (MHz) 1
Typical Overcurrent Protection Current N/A

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