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250 mA dual DC-DC converter for powering AMOLED display
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The STOD13AS is a dual DC-DC converter for AMOLED display panels. It integrates a step-up and an inverting DC-DC converter making it particularly suitable for battery operated products, in which the major concern is overall system efficiency. It works in pulse skipping mode during low load conditions and PWM-MODE at 1.5 MHz frequency for medium/high load conditions. The high frequency allows the value and size of external components to be reduced. The Enable pin allows the device to be turned off, therefore reducing the current consumption to less than 1 μA. The negative output voltage can be programmed by an MCU through a dedicated pin which implements single-wire protocol. Soft-start with controlled inrush current limit, thermal shutdown, and short-circuit protection are integrated functions of the device.

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Errata Sheet
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Key Features

  • Step-up and inverter converters
  • Operating input voltage range from 2.5 V to 4.5 V
  • Synchronous rectification for both DC-DC converters
  • Minimum 250 mA output current
  • 4.6 V fixed positive output voltage
  • Programmable negative voltage by SWIREfrom -2.4 V to -6.4 V at 100 mV steps
  • Typical efficiency: 85%
  • Pulse skipping mode in light load condition
  • 1.5 MHz PWM mode control switching frequency
  • TDMA noise high immunity
  • Enable pin for shutdown mode
  • Low quiescent current in shutdown mode
  • Soft-start with inrush current protection
  • Overtemperature protection
  • Temperature range: -40 °C to 85 °C
  • True-shutdown mode
  • Fast discharge outputs of the circuits after shutdown
  • Short-circuit protection
  • Package DFN12L (3 x 3 mm) 0.6 mm height

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS8859: 250 mA dual DC-DC converter for powering AMOLED displays
1.0 689 KB

Presentations & Training Material


Description Version Size
Power management for handheld and portable applications
734 KB

Publications and Collaterals

Selection Guides

Description Version Size
Linear and Switching Voltage Regulators Selection Guide
384 KB

Sample & Buy

Part Number Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Automotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STOD13ASTPURActiveVFDFPN 12 3x3x0.55Tape And Reel-4085_-1.1Distributor reported inventory date: 2016-02-29
Distributor NameRegionStockMin. order

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.