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Dual-Output DC/DC Power Supply for AMOLED

Best-in-Class Efficiency and Accuracy Improve OLED Image Quality and Improve Battery Lifetime

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • 2.3V to 4.2V Input Operating Voltage Range
  • High-Performance PWM Step-Up Regulator
    • Fixed 4.6V, 250mA Output
    • High Accuracy (±1.0%)
    • 1.4MHz Switching Frequency
    • Built-In 6V/0.25Ω n-Channel MOSFET with Lossless Current Sensing
    • Built-In 6V/0.5Ω p-Channel MOSFET Synchronous Rectifier
    • Cycle-by-Cycle Current Limit
    • More than 85% Efficiency at 150mA
    • Good Low-Duty Factor Operation
  • High-Performance PWM Inverting Regulator
    • Programmable 250mA Output
    • High Accuracy (±1%)
    • Adjustable Controlled-Output-Voltage Slew Rate
    • 1.4MHz Switching Frequency
    • Built-In 14V/25Ω p-Channel MOSFET with Lossless Current Sensing
    • Built-In 14V/25Ω n-Channel MOSFET Synchronous Rectifier
    • Cycle-by-Cycle Current Limit
    • More than 80% Efficiency at 150mA
  • True Shutdown for Both Outputs
  • Timer-Delayed Output Undervoltage Shutdown for Both Outputs
  • Thermal-Overload Protection
  • 12-Pin, 3mm x 3mm Ultra-Thin DFN Package and 24-Pin, 4mm x 4mm TQFN Package

Applications/Uses

  • Automobile Navigation
  • OLED Displays
  • Phone, DSC Displays

Description

The MAX17116 includes two current-mode 1.4MHz switch mode power-supply (SMPS) regulators for active-matrix organic light-emitting diode (AMOLED) displays. The positive supply is provided by a step-up regulator with a synchronous rectifier. The negative supply is provided by an inverting regulator with a synchronous rectifier.

The step-up DC-DC converter is a high-accuracy 250mA regulator with an integrated power MOSFET switch and synchronous rectifier. The synchronous rectifier improves efficiency and also provides True Shutdown™. Its 4.6V (fixed) output efficiency exceeds 85% at 150mA from a 3.7V input. A built-in, 7-bit, digital soft-start function controls startup inrush currents.

The inverting DC-DC converter is a high-accuracy 250mA regulator with a built-in power MOSFET switch and synchronous rectifier. Its -5.4V to -1.5V output efficiency exceeds 80% at 150mA from a 3.7V input. A built-in, 7-bit, digital soft-start function controls startup inrush currents. The internally set output voltage is adjusted through a unique communication protocol through the single EN pin.

The IC is available in a 12-pin, 3mm x 3mm x 0.5mm, ultra-thin DFN package with exposed pad and 0.5mm lead spacing to facilitate placement on extremely narrow circuit boards and a 24-pin, 4mm x 4mm, thin QFN package with exposed pad.

Simplified Block Diagram

MAX17116: Typical Operating Circuit MAX17116: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .