STOD2540 STMicroelectronics, STOD2540 Datasheet
STOD2540
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STOD2540 Summary of contents
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... The current capability of STOD2540 allows feeding a 1", 1.3" or 1.5" color PMOLED. STOD2540 is a boost converter that operates from 3 5.5 V and can provide an output voltage as high The output current capability is maximum output voltage ...
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... Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.1 Boost controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.2 Adjustable peak inductor current limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.3 Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.4 OVP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.5 Load isolation switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5.6 Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5.7 Under voltage lockout (UVLO Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6.1 Demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2/20 Doc ID 12204 Rev 10 STOD2540 ...
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... STOD2540 1 Diagram Figure 1. Block diagram Doc ID 12204 Rev 10 Diagram 3/20 ...
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... Peak inductor current adjust SET 3 AGND Analog ground 4 FB Feedback for the LED current regulation 5 V Output voltage for LED supply Load disconnect switch input CAP enable signal 8 V Boost switch drain SW PGND Power ground 4/20 Note Doc ID 12204 Rev 10 STOD2540 ...
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... STOD2540 3 Maximum ratings Table 3. Absolute maximum ratings Symbol Breakdown voltage at OUT and SW pin Supply voltage range pin SET SET EN Enable pin V ESD ratings, HBM MIL STD 883C ESD T Storage temperature range STG T Operating junction temperature range OP Table 4. Thermal data ...
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... 4 mA Doc ID 12204 Rev 10 = 4.7 µ 4.7 µ 180 kΩ, 1 Min. Typ. Max. 3 0.4 0.8 0.8 1.2 0 0.2 1 0.75 1.2 I 1.18 1.24 1.30 5.5 300 STOD2540 Unit µA mA Ω V Ω µ ...
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... STOD2540 Table 5. Electrical characteristics (continued) Symbol Parameter Enable input logic low V EN Enable input logic high Line_V Line regulation Load_V Line regulation Guaranteed by design. Test condition Disable Low V IL Enable High 5 5 ...
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... Functional description 5.1 Boost controller STOD2540 is a boost converter operating in PFM (pulsed frequency modulation) mode. The converter monitors the output voltage through the bridge resistor divider R when the feedback voltage falls below the reference voltage, REF2, the boost switch t turns ON and the current ramps up. The inductor current is measured by detect the temperature compensated drain voltage of the boost MOSFET ...
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... STOD2540 is disabled. 5.6 Efficiency The total consumption of some PMOLED display, can be as low as 1 mA. In order to increase the battery run time of the device, STOD2540 offers a high efficiency over a wide range of load and input voltage range. 5.7 Under voltage lockout (UVLO) The minimum supply voltage is 3 ...
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... The external components suggested in this document should be considered as a design reference guide. The performances mentioned in the electrical characteristics table are not guaranteed for all the possible electrical parameters of the components included in this list. On other hand, the operation of STOD2540 is not limited to the use of components included in this list. 10/20 ...
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... STOD2540 6.1 Demonstration board Figure 4. Suggested demonstration board schematic (top layer view) Doc ID 12204 Rev 10 Typical application 11/20 ...
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... V, Typ. values @ 25 °C, unless otherwise specified Figure 5. Efficiency vs. output current Figure 7. V vs. temperature EN Figure 9. V vs. output current FB 12/ 4.7 µ 4.7 µ Figure 6. Figure 8. Figure 10. V Doc ID 12204 Rev 10 STOD2540 = 180 kΩ, 1 Efficiency vs. input voltage V vs. input voltage FB vs. output current FB ...
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... STOD2540 Figure 11. V vs. temperature OVP Figure 13. I vs. input voltage LIM_MAX Figure 15. I vs. R LIM_MAX SET Typical performance characteristics Figure 12. V RIPPLE Figure 14. I LIM_MAX Figure 16. I vs. temperature Q Doc ID 12204 Rev 10 vs. input voltage vs. temperature 13/20 ...
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... Typical performance characteristics Figure 17. t vs. temperature ON_MAX Figure 19. Line V vs. temperature FB 14/20 Figure 18. t OFF_MIN Figure 20. Load V Doc ID 12204 Rev 10 STOD2540 vs. temperature vs. temperature FB ...
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... STOD2540 8 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 trademark. Table 7. QFN8 ( mm) mechanical data Dim ...
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... Package mechanical data Figure 21. Drawing dimension QFN8 ( mm) 16/20 Doc ID 12204 Rev 10 STOD2540 8057023_B ...
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... STOD2540 Tape & reel QFNxx/DFNxx (3x3) mechanical data Dim. Min 12 mm. Typ. Max. Min. 180 13.2 0.504 0.795 2.362 14.4 3.3 3.3 1 Doc ID 12204 Rev 10 Package mechanical data inch. Typ. Max. 7.087 0.519 0.567 0.130 0.130 0.043 0.157 0.315 ...
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... Package mechanical data Figure 22. QFN8 (3x3) footprint recommended data 18/20 Doc ID 12204 Rev 10 STOD2540 ...
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... STOD2540 9 Revision history Table 8. Document revision history Date Revision 22-Mar-2006 1 03-Apr-2006 2 08-Jun-2006 3 23-Jun-2006 4 11-Sep-2006 5 27-Feb-2009 6 03-Mar-2009 7 11-Mar-2009 8 25-Nov-2009 9 01-Jul-2010 10 Initial release. Add fig. 2 demonstration board on page 3. Description in cover page updated. Change range of R value and add description paragraph 5.7. SET Mistake on table 4 Ripple test value 3.6 V ==> 4.2 V. ...
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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 20/20 Please Read Carefully: © 2010 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 12204 Rev 10 STOD2540 ...