STOD13ATPUR Datasheet, PDF (1/24 Pages) STMicroelectronics – 250 mA dual DC-DC converter for powering AMOLED displays

STOD13A
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 S_WIRE 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 outputs discharge circuit after shutdown
■ Short-circuit protection
■ Package DFN12L (3 x 3) 0.6 mm height
Applications
■ Active matrix AMOLED power supply in
portable devices
■ Cellular phones
■ Camcorders and digital still cameras
■ Multimedia players
Table 1. Device summary
DFN12L (3 x 3 mm)
Description
The STOD13A 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.
Order code
Positive voltage Negative voltage
Package
Packaging
STOD13ATPUR
4.6V
-2.4V to -6.4V
DFN12L (3 x 3mm) 3000 parts per reel
December 2011
Doc ID 022599 Rev 1
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www.st.com
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