LFXX Very low drop voltage regulator with inhibit function Datasheet - production data Description TO-220 TO-220FP PPAK DPAK Features • Very low-dropout voltage (0.45 V) • Very low quiescent current (typ. 50 µA in OFF mode, 500 µA in ON mode) • Output current up to 500 mA • Logic-controlled electronic shutdown • Output voltages of 1.5; 1.8; 2.5; 3.3; 4.7; 5; 6; 8; 8.5; 9; 12 V • Automotive grade product: 1.8 V, 2.5 V, 3.3 V, 5.0 V, 8.0 V, 8.
Contents LFXX Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 Typical performance characteristics . . .
LFXX 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. Table 28. Table 29. Table 30. Table 31. Table 32. Table 33. Table 34. Table 35. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List of figures LFXX List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21. Figure 22. Figure 23. Figure 24. Figure 25. 4/53 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin connections (top view) . . . . . . . . . . . . . . . . . . .
LFXX 1 Diagram Diagram Figure 1.
Pin configuration 2 LFXX Pin configuration Figure 2.
LFXX 3 Maximum ratings Maximum ratings Table 1. Absolute maximum ratings Symbol Parameter Value Unit -0.5 to 40(1) V VI DC input voltage IO Output current Internally limited A PTOT Power dissipation Internally limited W TSTG Storage temperature range -40 to 150 °C TOP Operating junction temperature range -40 to 125 °C 1. For 18 < VI < 40 the regulator is in shutdown. Table 2.
Electrical characteristics 4 LFXX Electrical characteristics Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 3. LF15AB electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 3.5 V 1.485 1.5 1.515 IO = 50 mA, VI = 3.5 V, Ta = -25 to 85 °C 1.470 1.530 2.5 16 Unit V IO = 500 mA 1 V A ΔVO Line regulation VI = 2.
LFXX Electrical characteristics Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 4. LF18AB electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 3.3 V 1.782 1.8 1.818 IO = 50 mA, VI = 3.3 V, Ta = -25 to 85 °C 1.764 1.836 3 16 Unit V IO = 500 mA 1 V A ΔVO Line regulation VI = 2.
Electrical characteristics LFXX Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 5. LF18C electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 3.5 V 1.764 1.8 1.836 IO = 50 mA, VI = 3.5 V, Ta = -25 to 85 °C 1.728 1.872 3 16 Unit V IO = 500 mA 1 V A ΔVO Line regulation VI = 2.
LFXX Electrical characteristics Refer to test circuits, Ta = -40 to 125 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 6. LF18C (automotive grade) electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 50 mA, VI = 3.5 V, Ta = 25 °C 1.764 1.8 1.836 IO = 50 mA, VI = 3.5 V 1.713 1.887 3 16 Unit VO Output voltage VI Operating input voltage IO = 500 mA IO Output current limit Ta = 25 °C 1 ΔVO Line regulation VI = 2.
Electrical characteristics LFXX Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 7. LF25AB electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 4.5 V 2.475 2.5 2.525 IO = 50 mA, VI = 4.5 V, Ta = -25 to 85 °C 2.450 Unit V 2.550 IO = 500 mA 16 1 V A ΔVO Line regulation VI = 3.
LFXX Electrical characteristics Refer to test circuits, Ta = -40 to 125 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 8. LF25AB (automotive grade) electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 50 mA, VI = 4.5 V, Ta = 25 °C 2.475 2.5 2.525 IO = 50 mA, VI = 4.5 V 2.435 Unit VO Output voltage VI Operating input voltage IO = 500 mA IO Output current limit Ta = 25 °C 1 ΔVO Line regulation VI = 3.
Electrical characteristics LFXX Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 9. LF25C electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 4.5 V 2.45 2.5 2.55 IO = 50 mA, VI = 4.5 V, Ta = -25 to 85 °C 2.4 Unit V 2.6 IO = 500 mA 16 1 V A ΔVO Line regulation VI = 3.5 to 16 V, IO = 5 mA 2 12 mV ΔVO Load regulation VI = 3.
LFXX Electrical characteristics Refer to test circuits, Ta = -40 to 125 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 10. LF25C (automotive grade) electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 50 mA, VI = 4.5 V, Ta = 25 °C 2.45 2.5 2.55 IO = 50 mA, VI = 4.5 V 2.385 Unit VO Output voltage VI Operating input voltage IO = 500 mA IO Output current limit Ta = 25 °C 1 ΔVO Line regulation VI = 3.
Electrical characteristics LFXX Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 11. LF33AB electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 5.3 V 3.267 3.3 3.333 IO = 50 mA, VI = 5.3 V, Ta = -25 to 85 °C 3.234 Unit V 3.366 IO = 500 mA 16 1 V A ΔVO Line regulation VI = 4.
LFXX Electrical characteristics Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 12. LF33C electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 5.3 V 3.234 3.3 3.366 IO = 50 mA, VI = 5.3 V, Ta = -25 to 85 °C 3.168 Unit V 3.432 IO = 500 mA 16 1 V A ΔVO Line regulation VI = 4.
Electrical characteristics LFXX Refer to test circuits, Ta = -40 to 125 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 13. LF33C (automotive grade) electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 50 mA, VI = 5.3 V, Ta = 25 °C 3.234 3.3 3.366 IO = 50 mA, VI = 5.3 V, 3.153 Unit VO Output voltage VI Operating input voltage IO = 500 mA IO Output current limit Ta = 25 °C 1 ΔVO Line regulation VI = 4.
LFXX Electrical characteristics Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 14. LF50AB electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 7 V 4.95 5 5.05 IO = 50 mA, VI = 7 V, Ta = -25 to 85 °C 4.9 Unit V 5.1 IO = 500 mA 16 1 V A ΔVO Line regulation VI = 6 to 16 V, IO = 5 mA 5 25 mV ΔVO Load regulation VI = 6.
Electrical characteristics LFXX Refer to test circuits, Ta = -40 to 125 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 15. LF50AB (automotive grade) electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 50 mA, VI = 7 V, Ta = 25 °C 4.95 5 5.05 IO = 50 mA, VI = 7 V 4.
LFXX Electrical characteristics Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 16. LF50C electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 7 V 4.9 5 5.1 IO = 50 mA, VI = 7 V, Ta = -25 to 85 °C 4.8 Unit V 5.2 IO = 500 mA 16 1 V A ΔVO Line regulation VI = 6 to 16 V, IO = 5 mA 5 25 mV ΔVO Load regulation VI = 6.
Electrical characteristics LFXX Refer to test circuits, Ta = -40 to 125 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 17. LF50C (automotive grade) electrical characteristics Symbol Parameter Test conditions IO = 50 mA, VI = 7 V, Ta = 25 °C Min. Typ. Max. 4.9 5 5.1 Unit VO Output voltage VI Operating input voltage IO = 500 mA IO Output current limit Ta = 25 °C 1 ΔVO Line regulation VI = 6 to 16 V, IO = 5 mA 5 28 mV ΔVO Load regulation VI = 6.
LFXX Electrical characteristics Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 18. LF60AB electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 8 V 5.94 6 6.06 IO = 50 mA, VI = 8 V, Ta = -25 to 85 °C 5.88 Unit V 6.12 IO = 500 mA 16 1 V A ΔVO Line regulation VI = 7 to 16 V, IO = 5 mA 6 30 mV ΔVO Load regulation VI = 7.
Electrical characteristics LFXX Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 19. LF60C electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 8 V 5.88 6 6.12 IO = 50 mA, VI = 8 V, Ta = -25 to 85 °C 5.76 Unit V 6.24 IO = 500 mA 16 1 V A ΔVO Line regulation VI = 7 to 16 V, IO = 5 mA 6 30 mV ΔVO Load regulation VI = 7.
LFXX Electrical characteristics Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 20. LF80AB electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 10 V 7.92 8 8.08 IO = 50 mA, VI = 10 V, Ta = -25 to 85 °C 7.84 Unit V 8.16 IO = 500 mA 16 1 V A ΔVO Line regulation VI = 9 to 16 V, IO = 5 mA 8 40 mV ΔVO Load regulation VI = 9.
Electrical characteristics LFXX Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 21. LF80C electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 10 V 7.84 8 8.16 IO = 50 mA, VI = 10 V, Ta = -25 to 85 °C 7.68 Unit V 8.32 IO = 500 mA 16 1 V A ΔVO Line regulation VI = 9 to 16 V, IO = 5 mA 8 40 mV ΔVO Load regulation VI = 9.
LFXX Electrical characteristics Refer to test circuits, Ta = -40 to 125 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 22. LF80C (automotive grade) electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 50 mA, VI = 10 V, Ta = 25 °C 7.84 8 8.16 IO = 50 mA, VI = 10 V 7.
Electrical characteristics LFXX Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 23. LF85AB electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 10.5 V 8.415 8.5 8.585 IO = 50 mA, VI = 10.5 V, Ta = -25 to 85 °C 8.33 Unit V 8.67 IO = 500 mA 16 1 V A ΔVO Line regulation VI = 9.
LFXX Electrical characteristics Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 24. LF85C electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 10.5 V 8.33 8.5 8.67 IO = 50 mA, VI = 10.5 V, Ta = -25 to 85 °C 8.16 Unit V 8.84 IO = 500 mA 16 1 V A ΔVO Line regulation VI = 9.
Electrical characteristics LFXX Refer to test circuits, Ta = -40 to 125 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 25. LF85C (automotive grade) electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. IO = 50 mA, VI = 10.5 V, Ta = 25 °C 8.33 8.5 8.67 IO = 50 mA, VI = 10.5 V 8.145 Unit VO Output voltage VI Operating input voltage IO = 500 mA IO Output current limit Ta = 25 °C 1 ΔVO Line regulation VI = 9.
LFXX Electrical characteristics Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 26. LF90C electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 11 V 8.82 9 9.18 IO = 50 mA, VI = 11 V, Ta = -25 to 85 °C 8.64 Unit V 9.36 IO = 500 mA 16 1 V A ΔVO Line regulation VI = 10 to 16 V, IO = 5 mA 9 45 mV ΔVO Load regulation VI = 10.
Electrical characteristics LFXX Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 27. LF120AB electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 15 V 11.88 12 12.12 IO = 50 mA, VI = 15 V, Ta = -25 to 85 °C 11.76 Unit V 12.
LFXX Electrical characteristics Refer to test circuits, TJ = 25 °C, CI = 0.1 µF, CO = 2.2 µF unless otherwise specified. Table 28. LF120C electrical characteristics Symbol Parameter VO Output voltage VI Operating input voltage IO Output current limit Test conditions Min. Typ. Max. IO = 50 mA, VI = 14 V 11.76 12 12.24 IO = 50 mA, VI = 14 V, Ta = -25 to 85 °C 11.52 Unit V 12.
Typical performance characteristics 5 LFXX Typical performance characteristics Figure 4. Dropout voltage vs. output current Figure 5. Dropout voltage vs. temperature Figure 6. upply current vs. input voltage Figure 7. Supply current vs. input voltage (no load) Figure 8. Short-circuit current vs. input voltage Figure 9. Supply current vs. temperature Note: 34/53 Unless otherwise specified VO(NOM) = 3.
LFXX Typical performance characteristics Figure 10. Logic-controlled precision 3.3/5.0 V selectable output Figure 11.
Typical performance characteristics LFXX Figure 12. Multiple supply with ON/OFF toggle switch Figure 13.
LFXX Typical performance characteristics Figure 14. Delayed turn-on LFXX Figure 15.
Package information 6 LFXX Package information 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.
LFXX 6.1 Package information TO-220 package information Figure 16.
Package information LFXX Figure 17.
LFXX Package information Table 29. TO-220 mechanical data Type STD - ST dual gauge Type STD - ST single gauge mm mm Dim. Min. Max. Min. Typ. Max. A 4.40 4.60 4.40 4.60 b 0.61 0.88 0.61 0.88 b1 1.14 1.70 1.14 1.70 c 0.48 0.70 0.48 0.70 D 15.25 15.75 15.25 15.75 D1 Note: Typ. 1.27 E 10.00 10.40 10.00 10.40 e 2.40 2.70 2.40 2.70 e1 4.95 5.15 4.95 5.15 F 1.23 1.32 0.51 0.60 H1 6.20 6.60 6.20 6.60 J1 2.40 2.72 2.40 2.72 L 13.00 14.00 13.
Package information LFXX Figure 18.
LFXX Package information Table 30. TO-220FP mechanical data mm Dim. Min. Typ. Max. A 4.4 4.6 B 2.5 2.7 D 2.5 2.75 E 0.45 0.7 F 0.75 1 F1 1.15 1.70 F2 1.15 1.70 G 4.95 5.2 G1 2.4 2.7 H 10 10.4 L2 16 L3 28.6 30.6 L4 9.8 10.6 L5 2.9 3.6 L6 15.9 16.4 L7 9 9.3 Dia 3 3.
Package information 6.2 LFXX TO-220 packing information Figure 19. TO-220 dual gauge tube outline (dimensions in mm) Figure 20.
LFXX 6.3 Package information DPAK package information Figure 21.
Package information LFXX Table 31. DPAK mechanical data mm Dim. Min. Typ. Max. A 2.20 2.40 A1 0.90 1.10 A2 0.03 0.23 b 0.64 0.90 b4 5.20 5.40 c 0.45 0.60 c2 0.48 0.60 D 6.00 6.20 D1 5.10 E 6.40 6.60 E1 4.70 e 2.28 e1 4.40 4.60 H 9.35 10.10 L 1.00 1.50 (L1) 2.80 L2 0.80 L4 0.60 1.00 R 0.20 V2 0° 8° Figure 22. DPAK recommended footprint 6.7 1.8 3 1.6 2.3 6.7 2.3 1.
LFXX 6.4 Package information PPAK package information Figure 23.
Package information LFXX Table 32. PPAK mechanical data mm Dim. Min. Max. A 2.2 2.4 A1 0.9 1.1 A2 0.03 0.23 B 0.4 0.6 B2 5.2 5.4 C 0.45 0.6 C2 0.48 0.6 D 6 6.2 D1 E 5.1 6.4 6.6 E1 4.7 e 1.27 G 4.9 5.25 G1 2.38 2.7 H 9.35 L2 10.1 0.8 L4 0.6 L5 1 2.8 R 0.20 0° DocID2574 Rev 28 1 1 L6 V2 48/53 Typ.
LFXX 6.5 Package information DPAK and PPAK packing information Figure 24. DPAK and PPAK tape outline 10 pitches cumulative tolerance on tape +/- 0.2 mm T P0 Top cover tape P2 D E F B1 K0 For machine ref.
Package information LFXX Figure 25. DPAK and PPAK reel outline T REEL DIMENSIONS 40mm min. Access hole At sl ot location B D C N A Full radius G measured at hub Tape slot in core for tape start 25 mm min. width AM08851v2 Table 33. DPAK and PPAK tape and reel mechanical data Tape Reel mm mm Dim. Dim. Min. Max. A0 6.8 7 A B0 10.4 10.6 B 1.5 12.1 C 12.8 1.6 D 20.2 G 16.4 50 B1 50/53 Min. Max. 330 13.2 D 1.5 D1 1.5 E 1.65 1.85 N F 7.4 7.6 T K0 2.55 2.
LFXX 7 Ordering information Ordering information Table 34. Order code Packages TO-220 TO-220 (dual gauge) TO-220FP DPAK (tape and reel) PPAK (tape and reel) LF15ABDT-TR LF18CDT-TR 1.5 V LF18CPT-TR LF18CDT-TRY(1) LF33CV LF33CV-DG Output voltages 1.8 V 1.8 V LF18ABDT-TR LF18ABPT-TR 1.8 V LF25CDT-TR LF25CPT-TR 2.5 V LF25CDT-TRY(1) 2.5 V LF25ABDT-TR 2.5 V LF25ABDT-TRY(1) 2.5 V LF33CDT-TR LF33CPT-TR 3.3 V LF33CDT-TRY(1) LF33CPT-TRY(1) 3.
Revision history 8 LFXX Revision history Table 35. Document revision history Date Revision 21-Jun-2004 14 Document updating. 24-May-2006 15 Order codes updated. 02-Apr-2007 16 Order codes updated. 14-May-2007 17 Order codes updated. 26-Jul-2007 18 Add table 1 in cover page. 26-Nov-2007 19 Modified: Table 34. 16-Jan-2008 20 Added new order codes for automotive grade products see Table 34 on page 51. 12-Feb-2008 21 Modified: Table 34 on page 51.
LFXX IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.