STOD03ASTPUR Datasheet, PDF (1/24 Pages) STMicroelectronics – Dual DC-DC converter for powering AMOLED displays

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 V
■ Synchronous rectification for both DC-DC
converters
■ Minimum 200 mA output current
■ 4.6 V fixed positive output voltage
■ Programmable negative voltage by S_WIRE from
-2.4 V to -5.4 V at 100 mV steps
■ Typical efficiency: 85%
■ Pulse skipping mode in light load condition
■ 1.5 MHz PWM mode control switching
frequency
■ 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
■ Cellular phones
■ Camcorders and digital still cameras
■ Multimedia players
DFN12L (3 x 3 mm)
Description
The STOD03AS is a dual DC-DC converter with
short-circuit protection 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 light 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 and thermal shutdown are integrated
functions of the device.
Table 1. Device summary
Order code
Positive voltage
STOD03ASTPUR
4.6V
Negative voltage
-2.4V to -5.4V
Package
DFN12L (3 x 3 mm)
Packaging
3000 parts per reel
December 2011
Doc ID 022614 Rev 1
1/24
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