LD1085xx. 3 A low drop positive voltage regulator adjustable and fixed. Features. Description

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1 3 A low drop positive voltage regulator adjustable and fixed Features Typical dropout 1.3 V (at 3 A) Three terminal adjustable or fixed output voltage 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V, 12 V. Automotive grade product: adjustable V OUT only in TO-220 full pack package 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, DPAK, D 2 PAK, D 2 PAK/A Pinout compatibility with standard adjustable VREG Description The LD1085xx is a low drop voltage regulator able to provide up to 3 A of output current. Dropout is guaranteed at a maximum of 1.2 V at the maximum output current, decreasing at lower loads. The LD1085xx is pin to pin compatible with the older 3-terminal adjustable regulators, but has better performances in term of drop and output tolerance. A 2.85 V output version is suitable for SCSI-2 active termination. Unlike PNP regulators, where a part of the output current is wasted as quiescent current, the LD1085xx quiescent current flows DPAK TO-220 D 2 PAK TO-220FP D 2 PAK/A into the load, so increase efficiency. Only a 10 µf minimum capacitor is need for stability. The device is supplied in TO-220, TO-220FP, DPAK, D 2 PAK and D 2 PAK/A. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 1 % at 25 C. The LD1085xx is available as automotive grade in TO-220FP package only, for the option of adjustable output voltage whose commercial part number is shown in the Table 11: Order codes. This device is qualified according to the specification AEC-Q100 of the automotive market, in the temperature range -40 C to 125 C, and the statistical tests PAT, SYL, SBL are performed. Table 1. Device summary Part numbers LD1085XX LD1085XX15 LD1085XX18 LD1085XX25 LD1085XX33 LD1085XX50 July 2009 Doc ID 6738 Rev 25 1/

2 Contents LD1085xx Contents 1 Diagram Pin configuration Maximum ratings Schematic application Electrical characteristics Typical application Package mechanical data Order codes Revision history /28 Doc ID 6738 Rev 25

3 Diagram 1 Diagram Figure 1. Schematic diagram Doc ID 6738 Rev 25 3/28

4 Pin configuration LD1085xx 2 Pin configuration Figure 2. Pin connections (top view) TO-220 TO-220FP D 2 PAK D 2 PAK/A DPAK 4/28 Doc ID 6738 Rev 25

5 Maximum ratings 3 Maximum ratings Table 2. Absolute maximum ratings Symbol Parameter Value Unit V I DC input voltage 30 V I O Output current Internally limited ma P D Power dissipation Internally limited mw T STG Storage temperature range -55 to +150 C T OP Operating junction temperature range -40 to +125 C Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied Table 3. Thermal data Symbol Parameter TO-220 TO-220FP DPAK D 2 PAK D 2 PAK/A Unit R thjc Thermal resistance junction-case C/W R thja Thermal resistance junction-ambient C/W Doc ID 6738 Rev 25 5/28

6 Schematic application LD1085xx 4 Schematic application Figure 3. Application circuit V O V REF 1 R 2 = R 1 6/28 Doc ID 6738 Rev 25

7 Electrical characteristics 5 Electrical characteristics Table 4. V I = 4.5 V, C I = C O =10 µf, T A = -40 to 125 C, unless otherwise specified. Electrical characteristics of LD1085#15 Symbol Parameter Test condition Min. Typ. Max. Unit V O Output voltage (1) I O = 0 ma, T J = 25 C V I O = 0 to 3 A, V I = 3.1 to 30 V V ΔV O ΔV O Line regulation Load regulation I O = 0 ma, V I = 3.1 to 18 V, T J = 25 C mv I O = 0 ma, V I = 3.1 to 15 V mv I O = 0 to 3 A, T J = 25 C 2 10 mv I O = 0 to 3 A 4 20 mv V d Dropout voltage I O =3 A V I q Quiescent current V I 30 V 5 10 ma I sc SVR Short circuit current V I - V O = 5 V A V I - V O = 25 V A Thermal regulation T A = 25 C, 30ms pulse %/W Supply voltage rejection f = 120 Hz, C O = 25 µf, I O = 3 A V I = 7.5 ± 3 V db en RMS output noise voltage (% of V O ) T A = 25 C, f =10 Hz to 10 khz % S Temperature stability 0.5 % S Long term stability T A = 125 C, 1000Hrs 0.5 % 1. See short-circuit current curve for available output current at fixed dropout. Doc ID 6738 Rev 25 7/28

8 Electrical characteristics LD1085xx Table 5. V I = 4.8 V, C I = C O =10 µf, T A = -40 to 125 C, unless otherwise specified. Electrical characteristics of LD1085#18 Symbol Parameter Test condition Min. Typ. Max. Unit V O Output voltage (1) I O = 0 ma, T J = 25 C V I O = 0 to 3 A, V I = 3.4 to 30 V V ΔV O ΔV O Line regulation Load regulation I O = 0 ma, V I = 3.4 to 18 V T J = 25 C mv I O = 0 ma, V I = 3.4 to 15 V mv I O = 0 to 3 A, T J = 25 C 2 10 mv I O = 0 to 3 A 4 20 mv V d Dropout voltage I O = 3 A V I q Quiescent current V I 30 V 5 10 ma I sc SVR Short circuit current V I - V O = 5 V A V I - V O = 25 V A Thermal regulation T A = 25 C, 30 ms pulse %/W Supply voltage rejection f = 120 Hz, C O = 25 µf, I O = 3 A V I = 7.5 ± 3 V db en RMS output noise voltage (% of V O ) T A = 25 C, f =10 Hz to 10 khz % S Temperature stability 0.5 % S Long term stability T A = 125 C, 1000 Hrs 0.5 % 1. See short-circuit current curve for available output current at fixed dropout. 8/28 Doc ID 6738 Rev 25

9 Electrical characteristics Table 6. V I = 5.5 V, C I = C O =10 µf, T A = -40 to 125 C, unless otherwise specified. Electrical characteristics of LD1085#25 Symbol Parameter Test condition Min. Typ. Max. Unit V O Output voltage (1) I O = 0 ma, T J = 25 C V I O = 0 to 3 A, V I = 4.1 to 30 V V ΔV O ΔV O Line regulation Load regulation I O = 0 ma, V I = 4.1 to 18 V, T J = 25 C mv I O = 0 ma, V I = 4.1 to 18 V mv I O = 0 to 3 A, T J = 25 C 2 10 mv I O = 0 to 3 A 4 20 mv V d Dropout voltage I O = 3 A V I q Quiescent current V I 30 V 5 10 ma I sc SVR Short circuit current V I - V O = 5 V A V I - V O = 25 V A Thermal regulation T A = 25 C, 30ms pulse %/W Supply voltage rejection f = 120 Hz, C O = 25µF, I O = 3 A V I = 7.5 ± 3 V db en RMS output noise voltage (% of V O ) T A = 25 C, f =10 Hz to 10 khz % S Temperature stability 0.5 % S Long term stability T A = 125 C, 1000 Hrs 0.5 % 1. See short-circuit current curve for available output current at fixed dropout. Doc ID 6738 Rev 25 9/28

10 Electrical characteristics LD1085xx Table 7. V I = 6.3 V, C I = C O =10 µf, T A = -40 to 125 C, unless otherwise specified. Electrical characteristics of LD1085#33 Symbol Parameter Test condition Min. Typ. Max. Unit V O Output voltage (1) I O = 0 ma, T J = 25 C V I O = 0 to 3 A, V I = 4.9 to 30 V V ΔV O ΔV O Line regulation Load regulation I O = 0 ma, V I = 4.9 to 18 V, T J = 25 C mv I O = 0 ma, V I = 4.9 to 18 V 1 6 mv I O = 0 to 3 A, T J = 25 C 3 15 mv I O = 0 to 3 A 7 20 mv V d Dropout voltage I O = 3 A V I q Quiescent current V I 30 V 5 10 ma I sc SVR Short circuit current V I - V O = 5 V A V I - V O = 25 V A Thermal regulation T A = 25 C, 30 ms pulse %/W Supply voltage rejection f = 120 Hz, C O = 25 µf, I O = 3 A V I = 8.3 ± 3 V db en RMS output noise voltage (% of V O ) T A = 25 C, f =10 Hz to 10 khz % S Temperature stability 0.5 % S Long term stability T A = 125 C, 1000 Hrs 0.5 % 1. See short-circuit current curve for available output current at fixed dropout. 10/28 Doc ID 6738 Rev 25

11 Electrical characteristics Table 8. V I = 8 V, C I = C O =10 µf, T A = -40 to 125 C, unless otherwise specified. Electrical characteristics of LD1085#50 Symbol Parameter Test condition Min. Typ. Max. Unit V O Output voltage (1) I O = 0 ma, T J = 25 C V I O = 0 to 3 A, V I = 6.6 to 30 V V ΔV O ΔV O Line regulation Load regulation I O = 0 ma, V I = 6.6 to 20 V, T J = 25 C mv I O = 0 ma, V I = 6.6 to 20 V 1 10 mv I O = 0 to 3 A, T J = 25 C 5 10 mv I O = 0 to 3 A mv V d Dropout voltage I O = 3 A V I q Quiescent current V I 30 V 5 10 ma I sc SVR Short circuit current V I - V O = 5 V A V I - V O = 25 V A Thermal regulation T A = 25 C, 30 ms pulse %/W Supply voltage rejection f = 120 Hz, C O = 25 µf, I O = 3 A V I = 10 ± 3 V db en RMS output noise voltage (% of V O ) T A = 25 C, f = 10 Hz to 10 khz % S Temperature stability 0.5 % S Long term stability T A = 125 C, 1000 Hrs 0.5 % 1. See short-circuit current curve for available output current at fixed dropout. Doc ID 6738 Rev 25 11/28

12 Electrical characteristics LD1085xx Table 9. V I = 4.25 V, C I = C O =10 µf, T A = -40 to 125 C, unless otherwise specified. Electrical characteristics of LD1085# Symbol Parameter Test condition Min. Typ. Max. Unit V O Output voltage (1) I O = 10 ma T J = 25 C V I O = 10 ma to 3 A, V I = 2.85 to 30 V V ΔV O ΔV O Line regulation Load regulation I O = 10 ma, V I = 2.85 to 16.5 V, T J = 25 C % I O = 10 ma, V I = 2.85 to 16.5 V % I O = 10 ma to 3 A, T J = 25 C % I O = 0 to 3 A % V d Dropout voltage I O = 3 A V I O(min) Minimum load current V I = 30 V 3 10 ma I sc Short circuit current V I - V O = 5 V A V I - V O = 25 V A Thermal regulation T A = 25 C, 30ms pulse %/W f = 120 Hz, C SVR Supply voltage rejection O = 25 µf,c ADJ = 25 µf, db I O = 3 A, V I = 6.25 ± 3 V I ADJ Adjust pin current V I = 4.25 V, I O = 10 ma µa ΔI ADJ Adjust pin current change (1) I O = 10 ma to 3 A, V I = 2.85 to 16.5 V µa en RMS output noise voltage (% of V O ) T A = 25 C, f =10 Hz to 10 khz % S Temperature stability 0.5 % S Long term stability T A = 125 C, 1000 Hrs 0.5 % 1. See short-circuit current curve for available output current at fixed dropout. 12/28 Doc ID 6738 Rev 25

13 Electrical characteristics Table 10. V I = 4.25 V, C I = C O =10 µf, T A = -40 to 125 C, unless otherwise specified. Electrical characteristics of LD1085PY (Automotive Grade) Symbol Parameter Test condition Min. Typ. Max. Unit V O Output voltage (1) I O = 10 ma T A = 25 C V I O = 10 ma to 3 A, V I = 2.85 to 30 V V ΔV O Line regulation I O = 10 ma, V I = 2.85 to 16.5 V % ΔV O Load regulation I O = 0 to 3 A % V d Dropout voltage I O = 3 A V I O(min) Minimum load current V I = 30 V 3 10 ma I sc Short circuit current V I - V O = 5 V, T A = 25 C A V I - V O = 25 V, T A = 25 C A Thermal regulation T A = 25 C, 30 ms pulse %/W f = 120 Hz, C SVR Supply voltage rejection O = 25 µf,c ADJ = 25 µf, db I O = 3 A, V I = 6.25 ± 3 V, T A = 25 C I ADJ Adjust pin current V I = 4.25 V, I O = 10 ma µa ΔI ADJ Adjust pin current change (1) I O = 10 ma to 3 A, V I = 2.85 to 16.5 V µa en RMS output noise voltage (% of V O ) T A = 25 C, f =10 Hz to 10 khz % S Temperature stability 0.5 % S Long term stability T A = 125 C, 1000 Hrs 0.5 % 1. See short-circuit current curve for available output current at fixed dropout. Doc ID 6738 Rev 25 13/28

14 Typical application LD1085xx 6 Typical application Unless otherwise specified T J = 25 C, C I = C O = 10 µf. Figure 4. Output voltage vs. temperature Figure 5. Output voltage vs. temperature Figure 6. Output voltage vs. temperature Figure 7. Short circuit current vs. dropout voltage Figure 8. Line regulation vs. temperature Figure 9. Load regulation vs. temperature 14/28 Doc ID 6738 Rev 25

15 Typical application Figure 10. Dropout voltage vs. temperature Figure 11. Dropout voltage vs. output current Figure 12. Adjust pin current vs. temperature Figure 13. Quiescent current vs. temperature Figure 14. Line regulation vs. temperature Figure 15. Supply voltage rejection vs. output current Doc ID 6738 Rev 25 15/28

16 Typical application LD1085xx Figure 16. Supply voltage rejection vs. frequency Figure 17. Supply voltage rejection vs. temperature Figure 18. Minimum load current vs. temperature Figure 19. Stability, V O = 1.8 V Figure 20. Stability, V O = 12 V Figure 21. Line transient V I =12 to 13V, I O =200mA, C I = 1µF(tant), C O =10µF(tant), C ADJ =1µF 16/28 Doc ID 6738 Rev 25

17 Typical application Figure 22. Line transient Figure 23. Load transient V I =12 to 13V, I O =200mA, C I = 1µF(tant), C O =10µF(tant), C ADJ =1µF V I =12V, I O =0.12 to 3A, C I = 1µF(tant), C O =10µF(tant), C ADJ =1µF Figure 24. Load transient V I =12V, I O =0.12 to 3A, C I = 1µF(tant), C O =10µF(tant), C ADJ =1µF Doc ID 6738 Rev 25 17/28

18 Package mechanical data LD1085xx 7 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: ECOPACK is an ST trademark. 18/28 Doc ID 6738 Rev 25

19 Package mechanical data TO-220 mechanical data Dim. mm. inch. Min. Typ. Max. Min. Typ. Max. A C D D E F F F G G H L L L L L L DIA P011C Doc ID 6738 Rev 25 19/28

20 Package mechanical data LD1085xx TO-220FP mechanical data Dim. mm. inch. Min. Typ Max. Min. Typ. Max. A B D E F F F G G H L L L L L L DIA A-H 20/28 Doc ID 6738 Rev 25

21 Package mechanical data DPAK mechanical data Dim. mm. inch. Min. Typ. Max. Min. Typ. Max. A A A B b C C D D E E e e H L (L1) L L R V F Doc ID 6738 Rev 25 21/28

22 Package mechanical data LD1085xx D 2 PAK mechanical data mm. inch. Dim. Min. Typ. Max. Min. Typ. Max. A A A B B C C D D E E G L L L M R V P011P6G 22/28 Doc ID 6738 Rev 25

23 Package mechanical data D 2 PAK/A mechanical data Dim. mm. inch. Min. Typ. Max. Min. Typ. Max. A A A B B B C C D D E E G L L M R V /D Doc ID 6738 Rev 25 23/28

24 Package mechanical data LD1085xx Tape & reel DPAK-PPAK mechanical data Dim. mm. inch. Min. Typ. Max. Min. Typ. Max. A C D N T Ao Bo Ko Po P /28 Doc ID 6738 Rev 25

25 Package mechanical data Tape & reel D 2 PAK-P 2 PAK-D 2 PAK/A-P 2 PAK/A mechanical data Dim. mm. inch. Min. Typ. Max. Min. Typ. Max. A C D N T Ao Bo Ko Po P Doc ID 6738 Rev 25 25/28

26 Order codes LD1085xx 8 Order codes Table 11. Order codes Packages TO-220 TO-220FP D 2 PAK DPAK (T&R) D 2 PAK/A (T&R) Output voltage LD1085DT15R 1.5 V LD1085D2M18R 1.8 V LD1085D2M25R 2.5 V LD1085D2T33R LD1085D2M33R 3.3 V LD1085V V LD1085V LD1085P LD1085D2T-R LD1085D2M-R ADJ LD1085PY (1) ADJ 1. Automotive Grade products. 26/28 Doc ID 6738 Rev 25

27 Revision history 9 Revision history Table 12. Document revision history Date Revision Changes 07-Oct Mistake order codes - Table Feb Mistake U.M. load regulation - V ==> mv. 01-Mar Version 1.2 V removed. 22-May Order codes has been updated and new template. 10-Nov Add package DPAK, typo on V O test value in tables 3, 4 and Apr Order codes updated. 07-Jun Order codes updated. 05-Dec Modified: Table Jan Feb Modified: Table 11 on page Apr Modified: Table 11 on page Jul Modified: Table 11 on page Aug Modified: Table 3 on page Jul Modified: Table 11 on page 26. Added new order codes for Automotive grade products see Table 11 on page 26. Doc ID 6738 Rev 25 27/28

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LD A low drop positive voltage regulator: adjustable and fixed. Features. Description

LD A low drop positive voltage regulator: adjustable and fixed. Features. Description 3 A low drop positive voltage regulator: adjustable and fixed Datasheet - production data TO-220 TO-220FP Unlike PNP regulators, where a part of the output current is wasted as quiescent current, the LD1085