STOD13AMTPUR

STOD13AM 250 mA dual DC-DC converter for powering AMOLED displays Datasheet production data 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 DFN12L (3 x 3 mm) Programmable negative voltage by S from WIRE - 2.4 V to - 5.4 V at 100 mV steps Typical efficiency: 85% Pulse-skipping mode in light load condition Camcorders and digital still cameras 1.5 MHz PWM mode control switching Multimedia players frequency TDMA noise high immunity Description Enable pin for shutdown mode Low quiescent current in shutdown mode The STOD13AM is a dual DC-DC converter for AMOLED display panels. It integrates a step-up Soft-start with inrush current protection and an inverting DC-DC converter making it Overtemperature protection particularly suitable for battery operated products, Temperature range: - 40 C to 85 C in which the major concern is overall system efficiency. It works in pulse-skipping mode during True-shutdown mode low load conditions and PWM mode at 1.5 MHz Fast discharge outputs of the circuits after frequency for medium/high load conditions. The shutdown high frequency allows the value and size of Overload protection external components to be reduced. The Enable pin allows the device to be turned off, therefore Short-circuit protection reducing the current consumption to less than 1 Package DFN12L (3 x 3 mm) 0.6 mm height A. The negative output voltage can be programmed by an MCU through a dedicated pin which implements single-wire protocol. Soft-start Applications with controlled inrush current limit, thermal Active matrix OLED power supply in portable shutdown, and short-circuit protection are devices integrated functions of the device. Cellular phones Table 1. Device summary Order code Positive voltage Negative voltage Package Packaging STOD13AMTPUR 4.6 V - 2.4 V to - 5.4 V DFN12L (3 x 3 mm) 3000 parts per reel October 2012 Doc ID 023747 Rev 1 1/25 This is information on a product in full production. www.st.com 25Contents STOD13AM Contents 1 Schematic . 3 2 Pin configuration 5 3 Maximum ratings 6 4 Electrical characteristics . 7 5 Typical performance characteristics . 10 6 Detailed description 12 6.1 SWIRE . 12 6.1.1 SWIRE features and benefits . 12 6.1.2 SWIRE protocol . 12 6.1.3 SWIRE basic operations 12 6.2 Negative output voltage levels . 12 6.3 Enable, S and FD . 13 WIRE 7 Application information . 14 7.1 External passive components . 14 7.1.1 Inductor selection 14 7.1.2 Input and output capacitor selection . 14 7.2 Recommended PCB layout . 15 8 Detailed description 16 8.1 General description . 16 8.1.1 Multiple operation modes 16 8.1.2 Pulse-skipping operation 16 8.1.3 Discontinuous conduction mode 16 8.1.4 Continuous conduction mode 16 8.1.5 Enable pin . 17 8.1.6 Soft-start and inrush current limiting . 17 8.1.7 Undervoltage lockout . 17 8.1.8 Overtemperature protection 17 2/25 Doc ID 023747 Rev 1