EUP2512 ds2512 ver1.0 mar. 2011 1 dual channel dc-dc converter for amoled description the EUP2512 generates power supply rails for active -matrix organic light emitting diode (amoled) displays. it includes a step-up dc-dc and an inverting dc-dc converter ma king it suitable for battery operated products. the step-up converter is a high-accuracy power-effi ciency 250ma output regulator. it features an internal 0.5 n-mosfet, 0.6 p-mosfet and 1.4mhz operation frequency allowing the use of small inductor and ca pacitors. the integrated synchronous rectifier allows the tru e shutdown of the outputs. an internal digital soft-s tart function controls inrush currents. the step-up conv erter output can be externally set 4v to 8v. the inverting converter is a high-accuracy 250ma re gulator. it features an internal 0.4 n-mosfet, 0.5 p-mosfet and 1.4mhz operation frequency allowing the use of small inductor and capacitors. its -6v to -1v output effi ciency up to 80% at 150ma. an internal digital soft-start fun ction controls inrush currents. the EUP2512 is available in a small (3mm 3mm 0.6mm) 12 pin thin tdfn package and operates over the -40o c to +85oc temperature range. features 2.5v to 4.5v input supply range 1.4mhz current mode step up regulator - external programmable 4v~8v output voltage - maximum 250ma output - high accuracy (+/- 1%) - built-in 18v, 0.5 n-mosfet - built-in 18v, 0.6 p-mosfet synchronous rectifier - cycle-by-cycle current limit - more than 85% efficiency at 150ma - good low-duty factor operation 1.4mhz current mode inverting regulator - -6v to -1v - maximum 250ma output - high accuracy (+/- 1%) - built-in 18v, 0.5 p-mosfet - built-in 18v, 0.4 n-mosfet synchronous rectifier - cycle-by-cycle current limit - up to 80% efficiency at 150ma true shutdown mode for dual outputs timer-delayed output under-voltage shutdown for dual outputs over temperature protection 12 pin 3mm 3mm thin tdfn package rohs compliant and 100% lead(pb)-free halogen-free applications oled displays phone, dsc display automobile navigation
EUP2512 ds2512 ver1.0 mar. 2011 2 typical application circuit figure1. block diagram figure2.
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