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January 2012
Doc ID 022733 Rev 1
1/25
25
STOD13AS
250 mA 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 V
Synchronous rectification for both DC-DC
converters
Minimum 250 mA output current
4.6 V fixed positive output voltage
Programmable negative voltage by SWIRE from
-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
Applications
Active matrix AMOLED power supply in
portable devices
Cellular phones
Camcorders and digital still cameras
Multimedia players
Description
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.
DFN12L (3 x 3 mm)
Table 1.
Device summary
Order code
Positive voltage
Negative voltage
Package
Packaging
STOD13ASTPUR
4.6V
-2.4V to -6.4V
DFN12L (3 x 3mm)
3000 parts per reel
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