STOD1412 Datasheet, PDF (1/21 Pages) STMicroelectronics – Step-up and inverting DC-DC converter

STOD1412
Step-up and inverting DC-DC converter
Features
■ 2.7 V to 5.5 V input voltage range
■ 120 mA max output current for each converter
■ Output voltages:
– Step-up from 4.3 V to 6.0 V
– Inverting from -8.0 V to -2.0 V
■ Synchronous rectification for both DC-DC
converters
■ Efficiency:
– 80% I_O = 10 mA - 30 mA
– 85% I_O = 30 mA - 120 mA
■ 1.3 MHz PWM mode control
■ Shutdown mode with Enable pin
■ Inrush current protection
■ Adjustable output voltages
■ True shutdown mode
■ Less than 1 µA current consumption in
shutdown mode
■ Over-temperature protection
■ Package: 16 pin - QFN 3X3
■ Temperature range: -40°C to 85°C
Applications
■ Active matrix organic LED power supplies
■ Mobile phones
■ PDAs
■ Camcorders
■ Digital still cameras
QFN16L (3mm x 3mm)
Description
The STOD1412 is a dual DC-DC converter
capable of providing a positive and negative
voltage from a positive input voltage ranging from
2.7 V to 5.5 V. It integrates two complete power
stages, one step-up and one inverting, each of
which need just one inductor, and input and
output capacitor.
The STOD1412 works in PWM mode, switching at
a 1.3 MHz frequency, thus reducing the size and
values of external components. An Enable pin
makes it possible to turn off the device to reduce
the quiescent current to less than 1 µA. The
output voltages can be set easily by using two
external resistors for each converter.
The device integrates a “soft start” with controlled
inrush current limit, thermal shutdown and short
circuit protection.
High efficiency and low quiescent current,
combined with the small number and tiny size of
external components, make the STOD1412
suitable for battery-operated systems, particularly
for powering Active Matrix OLED display panels.
Table 1. Device summary
Order code
STOD1412PUR
Package
QFN16L (3x3 mm)
Packaging
4500 parts per reel
August 2007
Rev. 1
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www.st.com
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