The D2852 is a proof of concept for an ultra-high efficiency DC-DC step-down converter with a maximum output current of 8 A (10A peak). This is suitable for applications supplied by a dual (2S), triple (3S) Li-Ion or Li-Polymer stacked cell battery pack or any input voltage between 4 V and 13.5 V. It generates a varying (input voltage dependent) output voltage in the range of 2.8 V and 5 V, dynamically optimized for highest converter efficiency (conversion ratios are OTP programmable).

The hybrid power converter achieves typical conversion efficiency of up to 99%. Low profile external components and a minimum PCB footprint allow small circuit implementation in compact applications. As the pass devices are fully integrated, no external power switches are needed. The D2852 implements input voltage detection with autonomous wake-up and programmable soft-start to limit inrush current. It also implements integrated input voltage supervision and over-temperature protection for increased system reliability without the need for external sensing components.

Enable / ON-key supervision and power good signals are available, supporting different power-up or power cycle scenarios. Following on from this proof of concept, a product with robust protection features is being developed. We have just kicked-off this development and can incorporate application specific features from our key customers.


  • Input Voltage 4 V to 13.5 V
  • Output Voltage 2.8 to 5V (varying)
  • 8 A Output Current (10 A peak)
  • Integrated Power Switches
  • Power Good
  • Autonomous Soft Start (Configurable)
  • Ultra High-efficiency
  • Compact solution
  • One device for 2S & 3S, and 12V Systems
  • Limits the output voltage into a range
  • Prevents Brown-out by discharging Batteries to lower Voltages
  • Automatically selects Conversion Ratio with best Efficiency
  • Wide range of supported Applications
  • No need for external Power FETs
  • Minimum Solution Size
  • Virtual 1S Battery Pack (without need for Controls)



  • 2S Smartphones
  • Ultrabooks™
  • Tablet PCs
  • Notebook computers
  • Solid State Drives (SSDs)
  • DSLR and mirrorless Cameras
  • Power Banks
  • Game Consoles
  • Drones
  • Other 2S or 3S battery powered applications
  • Server


Title Type Date
Manual - Development Tools
Product Brief

Design & Development