STOD13AS 查看數據表（PDF） - STMicroelectronics

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STOD13AS

250 mA dual DC-DC converter for powering AMOLED displays

STMicroelectronics 

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

DFN12L (3 x 3 mm)

■ 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

■ 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.

■ Cellular phones

■ Camcorders and digital still cameras

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

January 2012

Doc ID 022733 Rev 1

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www.st.com

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