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LD1117 Dataheets PDF



Part Number LD1117
Manufacturers ST Microelectronics
Logo ST Microelectronics
Description Adjustable and fixed low drop positive voltage regulator
Datasheet LD1117 DatasheetLD1117 Datasheet (PDF)

LD1117 Adjustable and fixed low drop positive voltage regulator TO-220 DPAK SOT-223 SO-8 Features • Low dropout voltage (1 V typ.) • 2.85 V device performances are suitable for SCSI-2 active termination • Output current up to 800 mA • Fixed output voltage of: 1.2 V, 1.8 V, 2.5 V, 3.3 V, 5.0 V • Adjustable version availability (VREF = 1.25 V) • Internal current and thermal limit • Available in ± 1 % (at 25 °C) and 2 % in full temperature range • Supply voltage rejection: 75 dB (typ.) Datas.

  LD1117   LD1117


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LD1117 Adjustable and fixed low drop positive voltage regulator TO-220 DPAK SOT-223 SO-8 Features • Low dropout voltage (1 V typ.) • 2.85 V device performances are suitable for SCSI-2 active termination • Output current up to 800 mA • Fixed output voltage of: 1.2 V, 1.8 V, 2.5 V, 3.3 V, 5.0 V • Adjustable version availability (VREF = 1.25 V) • Internal current and thermal limit • Available in ± 1 % (at 25 °C) and 2 % in full temperature range • Supply voltage rejection: 75 dB (typ.) Datasheet - production data Description The LD1117 is a low drop voltage regulator able to provide up to 800 mA of output current, available even in adjustable version (VREF = 1.25 V). Concerning fixed versions, are offered the following output voltages: 1.2 V, 1.8 V, 2.5 V, 2.85 V, 3.3 V and 5.0 V. The device is supplied in: SOT-223, DPAK, SO-8 and TO-220. The SOT-223 and DPAK surface mount packages optimize the thermal characteristics even offering a relevant space saving effect. High efficiency is assured by NPN pass transistor. In fact in this case, unlike than PNP one, the quiescent current flows mostly into the load. Only a very common 10 µF minimum capacitor is needed for stability. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 1 % at 25 °C. The adjustable LD1117 is pin to pin compatible with the other standard. Adjustable voltage regulators maintaining the better performances in terms of drop and tolerance. February 2020 This is information on a product in full production. DocID2572 Rev 37 1/46 www.st.com 46 Contents Contents LD1117 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 7 LD1117 adjustable: application note . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 8 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 9 Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 10 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 2/46 DocID2572 Rev 37 LD1117 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Table 14. Table 15. Table 16. Table 17. Table 18. Table 19. Table 20. Table 21. Table 22. Table 23. Table 24. Table 25. Table 26. Table 27. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Electrical characteristics of LD1117#12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Electrical characteristics of LD1117#18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Electrical characteristics of LD1117#25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Electrical characteristics of LD1117#33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Electrical characteristics of LD1117#50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Electrical characteristics of LD1117 (adjustable) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Electrical characteristics of LD1117#12C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Electrical characteristics of LD1117#18C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Electrical characteristics of LD1117#25C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Electrical characteristics of LD1117#33C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Electrical characteristics of LD1117#50C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Electrical characteristics of LD1117C (adjustable) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 TO-220 mechanical data (type STD-ST Dual Gauge) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 TO-220 mechanical data (type STD-ST Single Gauge) . . . . . . . . . . .


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