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STOD02PUR Datasheet, PDF (1/23 Pages) STMicroelectronics – Dual DC-DC converter for powering AMOLED display
STOD02
Dual DC-DC converter for powering AMOLED display
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
■ 150 mA maximum output current
■ 4.6 V fixed positive output voltage
■ Programmable negative voltage by S-wire from
- 2.3 V to - 5.9 V
■ Typical efficiency: 85 %
■ Pulse skipping mode in light load condition
(IO < 10 mA)
■ 1.6 MHz PWM mode control switching
frequency (IO > 10 mA)
■ Enable pin for shutdown mode
■ Low quiescent current: < 1 µA in shutdown
mode
■ Soft-start with inrush current protection
■ Over temperature protection
■ Temperature range: -40 °C to 85 °C
■ True shutdown mode
■ Fast outputs discharge circuit after shutdown
■ Package: DFN 12 leads - (3 x 3 mm)
Applications
■ Active matrix organic LED power supply
(AMOLED)
■ Mobile phones
DFN12L (3 x 3 mm)
■ PDAs
■ Camcorders and digital still cameras
Description
The STOD02 is a dual DC-DC converter meant to
power AMOLED displays. It integrates a step up
and an inverting DC-DC converter making it
particularly suitable for battery operated products,
where the major concern is the overall system
efficiency. STOD02 works in pulse skipping mode
during low load condition and in PWM-mode (at
1.6 MHz) for medium/high load condition. The
high frequency allows reducing the value and
number of external components just to 6
components needed. The enable pin allows
turning off the device so reducing the current
consumption to less that 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
STOD02PUR
STOD02TPUR
Package
DFN12L (3 x 3 x 0.8 mm)
DFN12L (3 x 3 x 0.6 mm)
Packaging
3000 parts per reel
3000 parts per reel
June 2009
Doc ID 15245 Rev 3
1/23
www.st.com
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