STOD1812 Power supply for PMOLED display panel Features Synchronous step-up converter Input voltage range from 2.5 V to 5.5 V Maximum output current 120 mA Efficiency: 75 % at I = 10 mA - 30 mA 85 % at O I = 30 mA - 120 mA O DFN10L (3x3 mm) Switching at 1.2 MHz in typical application conditions Enable pin for shutdown mode True load disconnect Description Soft-start to limit inrush current STOD1812 is a step-up converter designed to UVLO protection power passive matrix OLED (PMOLED) displays, providing the pre-charge and biasing voltage of Adjustable output voltage up to 20 V the column matrix driver. STOD1812 uses a Low quiescent current: < 1 A in shutdown pulsed frequency modulation (PFM) control mode mode technique. The high switching frequency makes it Over-temperature protection possible to reduce the value and size of the external components. This device is particularly Package: DFN10L 3x3 mm, 0.8 mm suitable for battery-operated applications, where Operating junction temperature range: overall system efficiency is the major concern. -40 C to 125 C Synchronous rectification has been integrated in the device in order to eliminate the external Applications Schottky diode. An internal compensation net is Passive matrix OLED power supplies also integrated, enabling the STOD1812 to provide excellent load transient performance in Mobile phones addition to good load regulation. PDAs The output voltage is set using two external Camcorders resistors. Over-temperature protection and under- Digital still cameras voltage lockout (UVLO) functions are integrated in the device. An additional switch implements a true load disconnection feature which stops the currrent flowing from the input when the device is in shutdown mode. The EN pin turns off the device, reducing the quiescent current to 0.1 A. Table 1. Device summary Order code Package Packaging STOD1812PUR DFN10L (3x3 mm) 3000 parts per reel March 2008 Rev 1 1/19 www.st.com 19Contents STOD1812 Contents 1 Diagram . 3 2 Pin configuration 4 3 Maximum ratings 5 4 Electrical characteristics . 6 5 Functional description . 8 5.1 Boost controller . 8 5.2 Enable 8 5.3 Efficiency 8 5.4 Under voltage lockout (UVLO) 8 6 Typical application information 9 7 Demonstration board . 10 8 Typical application performance 11 9 Package mechanical data 13 10 Revision history . 18 2/19