ST STOD03AS Dual DC-DC Converter User Guide - For Powering AMOLED Displays
Summary
The STOD03AS is a high-efficiency dual DC-DC converter specifically designed for powering advanced AMOLED display panels, providing both positive and programmable negative voltage outputs. This manual serves as comprehensive technical documentation, covering schematics, electrical characteristics, advanced operational modes (like pulse skipping), safety features, and recommended PCB layout guidelines. It is essential for engineers developing portable electronics such as cellular phones, digital cameras, and multimedia players that require reliable, compact power management solutions.
Page 1 Text Content
STOD03AS Dual DC-DC converter
for powering AMOLED displays
Features Step-up and inverter converters Operating input voltage range from 2.5 V to 4.5 Synchronous rectification for both DC-DC converters Minimum 200 m A output current 4.6 V fixed positive output voltage
DFN12L (3 x 3 mm)
Programmable negative voltage by SWIRE from -2.4 V to -5.4 V at 100 m V steps Typical efficiency: 85% Pulse skipping mode in light load condition
1.5 MHz PWM mode control switching Description
frequency
The STOD03AS is a dual DC-DC converter with
Enable pin for shutdown mode
short-circuit protection for AMOLED display Low quiescent current in shutdown mode panels. It integrates a step-up and an inverting DC-DC converter making it particularly suitable
Soft-start with inrush current protection
for battery operated products, in which the major
Overtemperature protection
concern is overall system efficiency. It works in Temperature range: -40 °C to 85 °C pulse skipping mode during light load conditions and PWM-MODE at 1.5 MHz frequency for
True-shutdown mode
medium/high load conditions. The high frequency
Fast discharge outputs of the circuits after
allows the value and size of external components
shutdown
to be reduced. The Enable pin allows the device Short-circuit protection to be turned off, therefore reducing the current consumption to less than 1 µA. The negative
Package DFN12L (3 x 3 mm) 0.6 mm height
output voltage can be programmed by an MCU through a dedicated pin which implements single-
Applications
wire protocol. Soft-start with controlled inrush current limit and thermal shutdown are integrated
Active matrix AMOLED power supply
functions of the device.
Cellular phones Camcorders and digital still cameras Multimedia players
Table 1. Device summary Order code Positive voltage Negative voltage Package Packaging
STOD03ASTPUR 4.6V -2.4V to -5.4V DFN12L (3 x 3 mm) 3000 parts per reel
December 2011 Doc ID 022614 Rev 1 1/24
www.st.com
Page Summary Contents For ST STOD03AS Dual DC-DC Converter User Guide - For Powering AMOLED Displays
Manual Details
| Brand | Dual |
|---|---|
| Pages | 24 |
| File Size | 1.20 MB |
| Published | May 28, 2026 |
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Frequently Asked Questions
How can I program the negative output voltage?
The negative voltage can be programmed by an MCU through a dedicated pin, allowing settings from -2.4 V to -5.4 V at 100 mV steps.
What protection features does this converter include?
It integrates short-circuit, overtemperature, undervoltage lockout, and soft-start inrush current limiting protection.
How efficient is the device during light load operation?
It uses pulse skipping mode when operating in light load conditions to maintain overall system efficiency.
What applications are recommended for this dual DC-DC converter?
It is suitable for powering AMOLED displays, as well as cellular phones and multimedia players.