Description
The STOD30 is a triple DC-DC converter for AMOLED display panel. It integrates 300 mA step-up and inverting DC-DC converters plus auxiliary step-up converter. This device is particularly suitable for battery operated products, in which the major concern is the overall system efficiency. It works in pulse skipping mode during low load condition and PWM mode at 1.45 MHz frequency for medium/high load conditions. The high frequency allows the value and size of external components to be reduced. The enable and SWIRE pins allow the device to be turned off so to reduce the current consumption to less than 1 μA. The negative inverter and auxiliary step-up positive output voltages can be programmed by an MCU through a dedicated pin which implements SWIRE protocol. Auxiliary step-up positive output voltage is also configured by an external pull-down resistor. Soft-start with controlled inrush current limit, thermal shutdown and short-circuit protection are integrated functions of the device. QFN18 3.5x3.5 mm

Features
■ Two step-up converters and an inverting converter
■ Operating input voltage range from 2.5 V to 4.5 V
■ Synchronous rectification for all DC-DC converters
■ 300 mA output current for step-up and inverting converters (VIN > 2.9 V)
■ 60 mA output current for auxiliary step-up converter
■ Step-up converter fixed 4.6 V positive voltage
■ Programmable negative voltage by SWIRE from -1.4 V to -5.4 V in 100m V steps
■ Greater than 90% efficiency
■ Pulse skipping mode at light load condition
■ 1.45 MHz PWM mode control switching frequency
■ TDMA noise high immunity
■ Auxiliary step-up converter positive voltage programmable by SWIRE from 6.7 V to 7.6 V in 300 mV steps and configurable by external pull-down resistor
■ Enable pin for auxiliary step-up converter 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 after shutdown
■ Short-circuit protection

Applications
■ Active matrix OLED power supply in portable devices
■ Cellular phones, multimedia players, camcorders and digital cameras