STOD03ASTPUR STMicroelectronics

STOD03AS Dual DC-DC converter for powering AMOLED displays Datasheet - production data 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 Features short-circuit protection for AMOLED display Step-up and inverter converters panels. It integrates a step-up and an inverting DC-DC converter making it particularly suitable Operating input voltage range from 2.5 V to for battery operated products, in which the major 4.5 V concern is overall system efficiency. It works in Synchronous rectification for both DC-DC pulse skipping mode during light load conditions converters and PWM-MODE at 1.5 MHz frequency for Minimum 200 mA output current medium/high load conditions. The high frequency allows the value and size of external components 4.6 V fixed positive output voltage to be reduced. The Enable pin allows the device Programmable negative voltage by S from WIRE to be turned off, therefore reducing the current -2.4 V to -5.4 V at 100 mV steps consumption to less than 1 A. The negative Typical efficiency: 85% output voltage can be programmed by an MCU through a dedicated pin which implements single- Pulse skipping mode in light load condition wire protocol. Soft-start with controlled inrush 1.5 MHz PWM mode control switching current limit and thermal shutdown are integrated frequency functions of the device. 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 Table 1. Device summary Order code Positive voltage Negative voltage Package Packaging STOD03ASTPUR 4.6V -2.4V to -5.4V DFN12L (3 x 3 mm) 3000 parts per reel July 2013 DocID022614 Rev 2 1/25 This is information on a product in full production. www.st.comContents STOD03AS Contents 1 Schematic . 4 2 Pin configuration 6 3 Maximum ratings 7 4 Electrical characteristics . 8 5 Typical performance characteristics . 11 6 Detailed description 13 6.1 SWIRE . 13 6.1.1 SWIRE features and benefits 13 6.1.2 SWIRE protocol . 13 6.1.3 SWIRE basic operations 13 6.2 Negative output voltage levels . 14 7 Application information . 15 7.1 External passive components . 15 7.1.1 Inductor selection 15 7.1.2 Input and output capacitor selection . 15 7.2 Recommended PCB layout . 16 8 Detailed description 18 8.1 General description . 18 8.1.1 Multiple operation modes 18 8.1.2 Pulse skipping operation 18 8.1.3 Discontinuous conduction mode 18 8.1.4 Continuous conduction mode 19 8.1.5 Enable pin . 19 8.1.6 Soft-start and inrush current limiting . 19 8.1.7 Undervoltage lockout . 19 2/25 DocID022614 Rev 2