2.7V-5.5Vin, 1.5A, Synchronous Boost WLED Driver with I2C Interface for Tablet and Smart Phone

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Product Description

The MP3309 is a WLED step-up converter for 2.7V-to-5.5V input that uses peak-current mode to regulate the LED current sensed through an external, low-side resistor. The 200mV feedback voltage and synchronous rectification reduces power loss and reduces PCB space requirements. For non-synchronous mode, setting an internal register can disable the rectifier MOSFET to save driver losses.
The MP3309 features a programmable switching frequency to optimize efficiency. It supports both analog and PWM dimming.
In addition, the MP3309 has LED open protection, cycle-by-cycle current limit protection, Under voltage protection and thermal shutdown protection -. The I2C interface can set the protection indication bits and over-voltage protection point.

Product Features

  • 2.7V-to-5.5V Input Voltage
  • Analog and PWM Dimming
  • Selectable Synchronous or Non-synchronous Mode
  • 400kHz I2C-Compatible Interface
  • Digitally-Set LED Current
  • Programmable Switching Frequency
  • Programmable Over VoltageProtection Point
  • Low 200mV Feedback Voltage with ±1%
  • Software- or Hardware-Enable Function
  • Internal Soft Start
  • UVLO, Thermal Shutdown, OCP
  • Available in a 1.4mm ×1.8mm QFN-10 package
  • Default I2C Interface


  • Isw Limit (A)1.5
  • Ishutdown (µA)1
  • Vin (min) (V)2.7
  • Vin (max) (V)5.5
  • Channels1
  • fsw (min) (kHz)300
  • fsw (max) (kHz)1200
  • Vout (max) (V)35
  • Vfb (V)0.2
  • GradeCatalog
  • Rds(on) (mΩ)300
  • PackageQFN-10 (1.4x1.8)
  • Power MOSFETIntegrated
  • TopologyBoost
  • Dimming (Output)P-Dim, A-Dim
  • Iq (mA)0.42
  • Typical LCD Screen SizesSmall (<10")
  • Other FeaturesCABC, I2C, Sync Rectification
Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.