for further information contact your local stmicroelectronics sales office. january 2014 docid025751 rev 1 1/8 STOD30 300 ma triple dc-dc converter for powering amoled display data brief features ? two step-up converters and an inverting converter ? operating input voltage range from 2.5 v to 4.5 v ? synchronous rectification for all dc-dc converters ? 300 ma output current for step-up and inverting converters (v in > 2.9 v) ? 60 ma output current for auxiliary step-up converter ? step-up converter fixed 4.6 v positive voltage ? programmable negative voltage by s wire from -1.4 v to -5.4 v in 100m v steps ? greater than 90% efficiency ? pulse skipping mode at light load condition ? 1.45 mhz pwm mode control switching frequency ? tdma noise high immunity ? auxiliary step-up converter positive voltage programmable by s wire from 6.7 v to 7.6 v in 300 mv steps and configurable by external pull-down resistor ? enable pin for auxiliary step-up converter shutdown mode ? low quiescent current in shutdown mode ? soft-start with inrush current protection ? overtemperature protection ? temperature range -40 c to 85 c ? true shutdown mode ? fast outputs discharge after shutdown ? short-circuit protection ? package qfn 3.5x3.5 18 leads, 0.5 mm pitch applications ? active matrix oled power supply in portable devices ? cellular phones, multimedia players, camcorders and digital cameras description the STOD30 is a triple dc-dc converter for amoled display panel. it integrates 300 ma step-up and inverting dc-dc converters plus auxiliary step-up converter. this device is particularly suitable for battery operated products, in which the major concern is the overall system efficiency. it works in pulse skipping mode during low load condition and pwm mode at 1.45 mhz frequency for medium/high load conditions. the high frequency allows the value and size of external components to be reduced. the enable and swire pins allow the device to be turned off so to reduce the current consumption to less than 1 a. the negative inverter and auxiliary step-up positive output voltages can be programmed by an mcu through a dedicated pin which implements s wire protocol. auxiliary step-up positive output voltage is also configured by an external pull-down resistor. soft-start with controlled inrush current limit, thermal shutdown and short-circuit protection are integrated functions of the device. qfn18 3.5x3.5 mm table 1. device summary order code package packaging STOD30tpqr qfn18 3.5x3.5 mm 3000 parts per reel www.st.com
pin configuration STOD30 2/8 docid025751 rev 1 1 pin configuration figure 1. pin configuration (top view) table 2. pin description pin pin name description 1 vinp power input voltage pin 2 vo3 aux. step-up output voltage pin 3 lx3 aux. step-up switching pin 4 pgnd2 power ground 5 pgnd1 power ground 6 lx1 step-up switching pin 7 vo1 step-up output voltage pin 8 fbs feedback sense 9 agnd analog ground 10 vina analog input voltage pin 11 vref reference voltage pin 12 sel_vo3 aux. step-up output voltage select pin 13 swire swire pin 14 en_vo3 aux. step-up enable pin 15 nc not connected 16 fd fast discharge configuration pin 17 vo2 inverter output voltage pin 18 lx2 inverter switching pin exppad to guarantee proper operation of the device exposed pad must be connected to ground layers on the pcb
docid025751 rev 1 3/8 STOD30 package mechanical data 8 2 package mechanical data in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark.
package mechanical data STOD30 4/8 docid025751 rev 1 figure 2. qfn18 3.5x3.5x0.55 pitch 0.5 mm drawing 8374718_a
docid025751 rev 1 5/8 STOD30 package mechanical data 8 table 3. qfn18 3.5x3.5x0.55 pitch 0.5 mm mechanical data dim. mm min. typ. max. a 0.51 0.55 0.60 a1 0.00 0.02 0.05 b 0.18 0.25 0.30 d3.50 e3.50 d2 1.99 2.14 2.24 e2 1.99 2.14 2.24 e0.50 l 0.30 0.40 0.50 k0.20 aaa 0.05 bbb 0.10 ccc 0.10 ddd 0.05 eee 0.08
package mechanical data STOD30 6/8 docid025751 rev 1 figure 3. qfn18 3.5x3.5x0.55 pitch 0.5 mm recommended footprint (a) a. all dimensions are in millimeters footprint_8374718_a
docid025751 rev 1 7/8 STOD30 revision history 8 3 revision history table 4. document revision history date revision changes 07-jan-2014 1 initial release.
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