Diodes Incorporated

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AP3033 (Not Recommended for new design)

NRND = Not Recommended for New Design

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The AP3033 is an inductor-based DC/DC boost converter designed to drive °C arrays. 1.3A switching current allows AP3033 to be used in different 7' to 10' LCD panel backlights (3S8P °C arrays typically). A constant frequency 1MHz PWM control scheme is employed in this IC, which means tiny external components can be used. Specifically, 1mm tall 10μH inductor and 10μF output capacitor for the typical application is sufficient. The over output voltage protection is equipped in AP3033, which protects the IC under open load condition. The AP3033 includes UVLO, soft-start, standby mode, current limit and OTSD to protect the circuit.


  • Up to 92% Efficiency (VIN=9V, IOUT=160mA)
  • Up to 88% Efficiency (VIN=5V, IOUT=160mA)
  • Fast 1MHz Switching Frequency
  • Wide Input Voltage Range: 3V to 16V
  • Low 200mV Feedback Voltage
  • Output Over Voltage Protection
  • Cycle by Cycle Current Limit: 1.3A
  • High Frequency PWM Dimming
  • Built-in Soft-start
  • Built-in Thermal Shutdown Function
  • Under Voltage Lockout


  • 7' to 10' LCD Panels
  • Digital Photo Frame
  • GPS Receiver
  • Netbook
  • PDVD

Product Specifications

Product Parameters

Dimming High Frequency PWM and External DC
Efficiency (%) 92
Function Boost Converter
MaximumInput Voltage (V) 16
Maximum Output Current per Channel 260
Maximum Output Voltage (V) 37
MinimumInput Voltage (V) 3
Number of Regulated Output Channels 1
OperatingTemperatureRange  (°C) -40 to 85
Quiescent Current (µA) 5
Soft Start Yes
Standby Quiescent Current (µA) 50
Switching Frequency (kHz) 1
Typical Over-Current Protection Current 1300
VFB 200

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