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STOD1812 Datasheet(PDF) 1 Page - STMicroelectronics |
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STOD1812 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 19 page  March 2008 Rev 1 1/19 19 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 IO = 10 mA - 30 mA; 85 % at IO = 30 mA - 120 mA ■ Switching at 1.2 MHz in typical application conditions ■ Enable pin for shutdown mode ■ True load disconnect ■ Soft-start to limit inrush current ■ UVLO protection ■ Adjustable output voltage up to 20 V ■ Low quiescent current: < 1 µA in shutdown mode ■ Over-temperature protection ■ Package: DFN10L 3x3 mm, 0.8 mm ■ Operating junction temperature range: -40 °C to 125 °C Applications ■ Passive matrix OLED power supplies ■ Mobile phones ■ PDAs ■ Camcorders ■ Digital still cameras Description STOD1812 is a step-up converter designed to power passive matrix OLED (PMOLED) displays, providing the pre-charge and biasing voltage of the column matrix driver. STOD1812 uses a pulsed frequency modulation (PFM) control mode technique. The high switching frequency makes it possible to reduce the value and size of the external components. This device is particularly suitable for battery-operated applications, where overall system efficiency is the major concern. Synchronous rectification has been integrated in the device in order to eliminate the external Schottky diode. An internal compensation net is also integrated, enabling the STOD1812 to provide excellent load transient performance in addition to good load regulation. The output voltage is set using two external resistors. Over-temperature protection and under- 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 µA. DFN10L (3x3 mm) Table 1. Device summary Order code Package Packaging STOD1812PUR DFN10L (3x3 mm) 3000 parts per reel www.st.com |
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