3 A low drop positive voltage regulator: adjustable …

1 This is information on a product in full production. October 2013 DocID6738 Rev 271/2727LD10853 A low drop positive voltage regulator: adjustable and fixedDatasheet - production dataFeatures Typical dropout V (at 3 A) Three terminal adjustable or fixed output voltage V, V, V, 5 V Guaranteed output current up to 3 A Output tolerance 1% at 25 C and 2% in full temperature range Internal power and thermal limit Wide operating temperature range -40 C to 125 C Package available: TO-220, TO-220FP, D PAK, D PAK/A Pinout compatibility with standard adjustable VREGD escriptionThe LD1085 is a low drop voltage regulator able to provide up to 3 A of output current. Dropout is guaranteed at a maximum of V at the maximum output current, decreasing at lower loads.

2 The LD1085 is pin-to-pin compatible with the older 3-terminal adjustable regulators, but offers better performance in terms of drop and output PNP regulators, where a part of the output current is wasted as quiescent current, the LD1085 quiescent current flows into the load, thus increase efficiency. Only a 10 F minimum capacitor is need for device is supplied in TO-220, TO-220FP, D PAK and D PAK/A packages. On-chip trimming allows the regulator to reach a very tight output voltage tolerance, within 1% at 25 PAKD Rev 27 Contents1 Diagram .. 32 Pin configuration .. 43 Maximum ratings .. 54 Application schematic .. 65 Electrical characteristics .. 76 Typical characteristics .. 127 Package mechanical data.

3 168 Packaging mechanical data .. 239 Order codes .. 2610 Revision history .. 27 DocID6738 Rev 273/27LD1085 Diagram1 DiagramFigure 1. Schematic diagram Pin configurationLD10854/27 DocID6738 Rev 272 Pin configurationFigure 2. Pin connections (top view) TO-220 FPD PAK/ATO-220D PAKDocID6738 Rev 275/27LD1085 Maximum ratings3 Maximum ratingsNote:Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not impliedTable 1. Absolute maximum ratingsSymbolParameterValueUnitVIDC input voltage30 VIOO utput currentInternally limitedmAPDP ower dissipationInternally limitedmWTSTGS torage temperature range-55 to +150 CTOPO perating junction temperature range-40 to +125 CTable 2.

4 Thermal dataSymbolParameterTO-220TO-220 FPD PAK D PAK/AUnitRthJCThermal resistance junction-case353 C/WRthJAThermal resistance C/WApplication schematicLD10856/27 DocID6738 Rev 274 Application schematic Figure 3. Application circuit VOVREF1R2R1-------+ =DocID6738 Rev 277/27LD1085 Electrical characteristics5 Electrical characteristicsVI = V, CI = CO =10 F, TA = -40 to 125 C, unless otherwise specified. Table 3. Electrical characteristics of LD1085#18 SymbolParameterTest voltage (1)IO = 0 mA, TJ = 25 = 0 to 3 A, VI = to 30 VOLine regulationIO = 0 mA, VI = to 18 V TJ = 25 = 0 mA, VI = to 15 VOLoad regulationIO = 0 to 3 A, TJ = 25 C210mVIO = 0 to 3 A 420mVVdDropout voltageIO = 3 A currentVI 30 V510mAIscShort-circuit currentVI - VO = 5 - VO = 25 regulationTA = 25 C, 30 ms voltage rejectionf = 120 Hz, CO = 25 F, IO = 3 A VI = 3 V6072dBeNRMS output noise voltage (% of VO)

5 TA = 25 C, f =10 Hz to 10 term stabilityTA = 125 C, 1000 See short-circuit current curve for available output current at fixed characteristicsLD10858/27 DocID6738 Rev 27VI = V, CI = CO =10 F, TA = -40 to 125 C, unless otherwise specified. Table 4. Electrical characteristics of LD1085#25 SymbolParameterTest voltage (1)IO = 0 mA, TJ = 25 = 0 to 3 A, VI = to 30 VOLine regulationIO = 0 mA, VI = to 18 V, TJ = 25 = 0 mA, VI = to 18 VOLoad regulationIO = 0 to 3 A, TJ = 25 C210mVIO = 0 to 3 A 420mVVdDropout voltageIO = 3 A currentVI 30 V510mAIscShort-circuit currentVI - VO = 5 - VO = 25 regulationTA = 25 C, 30ms voltage rejectionf = 120 Hz, CO = 25 F, IO = 3 AVI = 3 V6072dBeNRMS output noise voltage (% of VO)

6 TA = 25 C, f =10 Hz to 10 term stabilityTA = 125 C, 1000 See short-circuit current curve for available output current at fixed Rev 279/27LD1085 Electrical characteristicsVI = V, CI = CO =10 F, TA = -40 to 125 C, unless otherwise specified. Table 5. Electrical characteristics of LD1085#33 SymbolParameterTest voltage (1)IO = 0 mA, TJ = 25 = 0 to 3 A, VI = to 30 VOLine regulationIO = 0 mA, VI = to 18 V, TJ = 25 = 0 mA, VI = to 18 V16mV VOLoad regulationIO = 0 to 3 A, TJ = 25 C315mVIO = 0 to 3 A720mVVdDropout voltageIO = 3 currentVI 30 V510mAIscShort-circuit currentVI - VO = 5 - VO = 25 regulationTA = 25 C, 30 ms voltage rejectionf = 120 Hz, CO = 25 F, IO = 3 AVI = 3 V6072dBeNRMS output noise voltage (% of VO)

7 TA = 25 C, f =10 Hz to 10 term stabilityTA = 125 C, 1000 See short-circuit current curve for available output current at fixed characteristicsLD108510/27 DocID6738 Rev 27VI = 8 V, CI = CO =10 F, TA = -40 to 125 C, unless otherwise specified. Table 6. Electrical characteristics of LD1085#50 SymbolParameterTest voltage (1)IO = 0 mA, TJ = 25 = 0 to 3 A, VI = to 30 VOLine regulationIO = 0 mA, VI = to 20 V, TJ = 25 = 0 mA, VI = to 20 V110mV VOLoad regulationIO = 0 to 3 A, TJ = 25 C510mVIO = 0 to 3 A1035mVVdDropout voltageIO = 3 currentVI 30 V510mAIscShort-circuit currentVI - VO = 5 - VO = 25 regulationTA = 25 C, 30 ms voltage rejectionf = 120 Hz, CO = 25 F, IO = 3 AVI = 10 3 V6072dBeNRMS output noise voltage (% of VO)

8 TA = 25 C, f = 10 Hz to 10 term stabilityTA = 125 C, 1000 See short-circuit current curve for available output current at fixed Rev 2711/27LD1085 Electrical characteristicsVI = V, CI = CO =10 F, TA = -40 to 125 C, unless otherwise specified. Table 7. Electrical characteristics of LD1085#SymbolParameterTest voltage (1)IO = 10 mA TJ = 25 = 10 mA to 3 A, VI = to 30 VOLine regulationIO = 10 mA, VI = to V,TJ = 25 = 10 mA, VI = to VOLoad regulationIO = 10 mA to 3 A, TJ = 25 = 0 to 3 voltageIO = 3 (min)Minimum load currentVI = 30 V310mAIscShort-circuit currentVI - VO = 5 - VO = 25 regulationTA = 25 C, 30ms voltage rejectionf = 120 Hz, CO = 25 F,CADJ = 25 F, IO = 3 A, VI = 3 V6072dBIADJA djust pin currentVI = V, IO = 10 mA55120 A IADJA djust pin current change (1)IO = 10 mA to 3 A, VI = to AeNRMS output noise voltage (% of VO)

9 TA = 25 C, f =10 Hz to 10 term stabilityTA = 125 C, 1000 See short-circuit current curve for available output current at fixed characteristicsLD108512/27 DocID6738 Rev 276 Typical characteristicsUnless otherwise specified TJ = 25 C, CI = CO = 10 F. Figure 4. Output voltage vs. temp. (IO = 3 A)Figure 5. Output voltage vs. temp. (IO = 0 mA) Figure 6. Output voltage vs. temp. (IO = 10 mA)Figure 7. Short-circuit current vs. dropout voltage DocID6738 Rev 2713/27LD1085 Typical characteristics Figure 8. Line regulation vs. temp. (IO = 10 mA)Figure 9. Load regulation vs. temperature Figure 10. Dropout voltage vs. temperatureFigure 11.

10 Dropout voltage vs. output current Figure 12. Adjust pin current vs. temperatureFigure 13. Quiescent current vs. temperature Typical characteristicsLD108514/27 DocID6738 Rev 27 Figure 14. Line regulation vs. temperature(VIN = 15 V)Figure 15. Supply voltage rejection vs. output current Figure 16. Supply voltage rejection vs. frequencyFigure 17. Supply voltage rejection vs. temperature Figure 18. Minimum load current vs. temperatureFigure 19. Stability, VO = V DocID6738 Rev 2715/27LD1085 Typical characteristics Figure 20. Stability, VO = 12 VFigure 21. Line transient VI=12 to 13V, IO=200mA, CI = 1 F(tant), CO=10 F(tant), CADJ=1 FFigure 22.