STOD1412 Inverting and step-up 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 QFN16L (3 x 3 mm) converters Efficiency: 80% I = 10 mA - 30 mA O 85% I = 30 mA - 120 mA O Description 1.3 MHz PWM mode control The STOD1412 is a dual DC-DC converter Shutdown mode with enable pin capable of producing a positive and negative Inrush current protection output voltage from a positive input voltage Adjustable output voltages ranging from 2.7 V to 5.5 V. It integrates two complete power stages, one step-up and one True shutdown mode inverting, each of which need just one inductor, Less than 1 A current consumption in and input and output capacitor. shutdown mode The STOD1412 works in PWM mode, switching at Overtemperature protection a 1.3 MHz frequency, thus reducing the size and Package: 16-pin QFN 3 x 3 mm values of external components. An enable pin Temperature range: - 40 C to 85 C makes it possible to turn off the device to reduce the quiescent current to less than 1 A. The output voltages can be set easily by using two Applications external resistors for each converter. Active matrix organic LED power supplies The device integrates a soft-start with controlled Mobile phones inrush current limit, thermal shutdown and short- circuit protection. PDAs Camcorders High efficiency and low quiescent current, combined with the small number and tiny size of Digital still cameras external components, make the STOD1412 suitable for battery-operated systems, particularly for powering active matrix OLED display panels. Table 1. Device summary Order code Package Packaging STOD1412PMR QFN16L (3 x 3 mm) 4500 parts per reel March 2010 Doc ID 13860 Rev 2 1/20 www.st.com 20 Obsolete Product(s) - Obsolete Product(s) Contents STOD1412 Contents 1 STOD1412 block diagram . 3 2 Pin configuration 4 3 Maximum ratings 5 4 Electrical characteristics . 6 5 Introduction . 8 5.1 Setting output voltage . 9 5.2 Undervoltage lockout . 9 5.3 Enable 9 5.4 Load disconnect . 9 5.5 Soft-start and inrush current 9 5.6 Current limit 9 5.7 External components 10 5.7.1 Inductor . 10 5.7.2 Capacitors . 10 5.7.3 PCB Layout 10 6 Typical application . 11 7 Typical performance characteristics . 12 8 Package mechanical data 14 9 Revision history . 19 2/20 Doc ID 13860 Rev 2 Obsolete Product(s) - Obsolete Product(s)