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| LD1085xx 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. 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, D2PAK, D2PAK/A Pinout compatibility with standard adjustable VREG DPAK D2PAK D2PAK/A TO-220 TO-220FP 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 into the load, so increase efficiency. Only a 10 F minimum capacitor is need for stability. The device is supplied in TO-220, TO-220FP, DPAK, D2PAK and D2PAK/A. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within 1% at 25 C. Table 1. Device summary Part number LD1085XX LD1085XX15 LD1085XX18 LD1085XX25 LD1085XX33 LD1085XX50 December 2007 Rev 19 1/27 www.st.com 27 Contents LD1085xx Contents 1 2 3 4 5 6 7 8 9 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 2/27 LD1085xx Diagram 1 Figure 1. Diagram Schematic diagram 3/27 Pin configuration LD1085xx 2 Figure 2. Pin configuration Pin connections (top view) TO-220 TO-220FP D2PAK D2PAK/A DPAK 4/27 LD1085xx Maximum ratings 3 Table 2. Maximum ratings Absolute maximum ratings Parameter DC input voltage Output current Power dissipation Storage temperature range Operating junction temperature range Value 30 Internally Limited Internally Limited -55 to +150 -40 to +125 Unit V mA mW C C Symbol VI IO PD TSTG TOP Note: Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied Thermal data Parameter Thermal resistance junction-case Thermal resistance junction-ambient TO-220 3 50 DPAK 8 100 D2PAK D2PAK/A 3 62.5 Unit C/W C/W Table 3. Symbol RthJC RthJA 5/27 Schematic application LD1085xx 4 Figure 3. Schematic application Application circuit R2 V O = V REF 1 + ------ R 1 6/27 LD1085xx Electrical characteristics 5 Table 4. Symbol VO VO VO Vd Iq Isc Electrical characteristics Electrical characteristics of LD1085#15 (VI = 4.5 V, CI = CO =10 F, TA = -40 to 125 C, unless otherwise specified). Parameter Output voltage (1) Test condition IO = 0 mA, TJ = 25C IO = 0 to 3A, VI = 3.1 to 30V Line regulation IO = 0 mA, VI = 3.1 to 18V, TJ = 25C IO = 0 mA, VI = 3.1 to 15V Load regulation Dropout voltage Quiescent current Short circuit current Thermal regulation SVR eN S S Supply voltage rejection IO = 0 to 3A, TJ = 25C IO = 0 to 3A IO =3 A VI 30V VI - VO = 5V VI - VO = 25V TA = 25C, 30ms pulse f = 120 Hz, CO = 25F, IO = 3A VI = 7.5 3V 60 3.2 0.2 Min. 1.485 1.47 Typ. 1.5 1.5 0.2 0.4 2 4 1.3 5 4.5 0.5 0.008 72 0.003 0.5 TA = 125C, 1000Hrs 0.5 0.04 Max. 1.515 1.53 4 4 10 20 1.5 10 Unit V V mV mV mV mV V mA A A %/W dB % % % RMS output noise voltage (% of TA = 25C, f =10Hz to 10kHz VO) Temperature stability Long term stability 1. See short-circuit current curve for available output current at fixed dropout. 7/27 Electrical characteristics LD1085xx Table 5. Symbol VO VO VO Vd Iq Isc Electrical characteristics of LD1085#18 (VI = 4.8 V, CI = CO =10 F, TA = -40 to 125 C, unless otherwise specified). Parameter Output voltage (1) Test condition IO = 0 mA, TJ = 25C IO = 0 to 3A, VI = 3.4 to 30V Line regulation IO = 0 mA, VI = 3.4 to 18V TJ = 25C IO = 0 mA, VI = 3.4 to 15V Load regulation Dropout voltage Quiescent current Short circuit current Thermal regulation IO = 0 to 3A, TJ = 25C IO = 0 to 3A IO = 3 A VI 30V VI - VO = 5V VI - VO = 25V TA = 25C, 30ms pulse f = 120 Hz, CO = 25F, IO = 3A VI = 7.5 3V 60 3.2 0.2 Min. 1.782 1.764 Typ. 1.8 1.8 0.2 0.4 2 4 1.3 5 4.5 0.5 0.008 72 0.003 0.5 TA = 125C, 1000Hrs 0.5 0.04 Max. 1.818 1.836 4 4 10 20 1.5 10 Unit V V mV mV mV mV V mA A A %/W dB % % % SVR eN S S Supply voltage rejection RMS output noise voltage (% of TA = 25C, f =10Hz to 10kHz VO) Temperature stability Long term stability 1. See short-circuit current curve for available output current at fixed dropout. 8/27 LD1085xx Electrical characteristics Table 6. Symbol VO VO VO Vd Iq Isc Electrical characteristics of LD1085#25 (VI = 5.5 V, CI = CO =10 F, TA = -40 to 125 C, unless otherwise specified). Parameter Output voltage (1) Test condition IO = 0 mA, TJ = 25C IO = 0 to 3A, VI = 4.1 to 30V Line regulation IO = 0 mA, VI = 4.1 to 18V, TJ = 25C IO = 0 mA, VI = 4.1 to 18V Load regulation Dropout voltage Quiescent current Short circuit current Thermal regulation IO = 0 to 3A, TJ = 25C IO = 0 to 3A IO = 3A VI 30V VI - VO = 5V VI - VO = 25V TA = 25C, 30ms pulse f = 120 Hz, CO = 25F, IO = 3A VI = 7.5 3V 60 3.2 0.2 Min. 2.475 2.45 Typ. 2.5 2.5 0.2 0.4 2 4 1.3 5 4.5 0.5 0.008 72 0.003 0.5 TA = 125C, 1000Hrs 0.5 0.04 Max. 2.525 2.55 4 4 10 20 1.5 10 Unit V V mV mV mV mV V mA A A %/W dB % % % SVR eN S S Supply voltage rejection RMS output noise voltage (% of TA = 25C, f =10Hz to 10kHz VO) Temperature stability Long term stability 1. See short-circuit current curve for available output current at fixed dropout. 9/27 Electrical characteristics LD1085xx Table 7. Symbol VO VO VO Vd Iq Isc Electrical characteristics of LD1085#33 (VI = 6.3 V, CI = CO =10 F, TA = -40 to 125 C, unless otherwise specified). Parameter Output voltage (1) Test condition IO = 0 mA, TJ = 25C IO = 0 to 3A, VI = 4.9 to 30V Line regulation IO = 0 mA, VI = 4.9 to 18V, TJ = 25C IO = 0 mA, VI = 4.9 to 18V Load regulation Dropout voltage Quiescent current Short circuit current Thermal regulation IO = 0 to 3A, TJ = 25C IO = 0 to 3A IO = 3A VI 30V VI - VO = 5V VI - VO = 25V TA = 25C, 30ms pulse f = 120 Hz, CO = 25F, IO = 3A VI = 8.3 3V 60 3.2 0.2 Min. 3.267 3.234 Typ. 3.3 3.35 0.5 1 3 7 1.3 5 4.5 0.5 0.008 72 0.003 0.5 TA = 125C, 1000Hrs 0.5 0.04 Max. 3.333 3.366 6 6 15 20 1.5 10 Unit V V mV mV mV mV V mA A A %/W dB % % % SVR eN S S Supply voltage rejection RMS output noise voltage (% of TA = 25C, f =10Hz to 10kHz VO) Temperature stability Long term stability 1. See short-circuit current curve for available output current at fixed dropout. 10/27 LD1085xx Electrical characteristics Table 8. Symbol VO VO VO Vd Iq Isc Electrical characteristics of LD1085#50 (VI = 8 V, CI = CO =10 F, TA = -40 to 125 C, unless otherwise specified). Parameter Output voltage (1) Test condition IO = 0 mA, TJ = 25C IO = 0 to 3A, VI = 6.6 to 30V Line regulation IO = 0 mA, VI = 6.6 to 20V, TJ = 25C IO = 0 mA, VI = 6.6 to 20V Load regulation Dropout voltage Quiescent current Short circuit current Thermal regulation IO = 0 to 3A, TJ = 25C IO = 0 to 3A IO = 3A VI 30V VI - VO = 5V VI - VO = 25V TA = 25C, 30ms pulse f = 120 Hz, CO = 25F, IO = 3A VI = 10 3V 60 3.2 0.2 Min. 4.95 4.9 Typ. 5 5 0.5 1 5 10 1.3 5 4.5 0.5 0.008 72 0.003 0.5 TA = 125C, 1000Hrs 0.5 0.04 Max. 5.05 5.1 10 10 10 35 1.5 10 Unit V V mV mV mV mV V mA A A %/W dB % % % SVR eN S S Supply voltage rejection RMS output noise voltage (% of TA = 25C, f =10Hz to 10kHz VO) Temperature stability Long term stability 1. See short-circuit current curve for available output current at fixed dropout. 11/27 Electrical characteristics LD1085xx Table 9. Symbol VO Electrical characteristics of LD1085# (VI = 4.25 V, CI = CO =10 F, TA = -40 to 125 C, unless otherwise specified). Parameter Output voltage (1) Test condition IO = 10mA TJ = 25C IO = 10mA to 3A, VI = 2.85 to 30V Line regulation IO = 10mA, VI = 2.85 to 16.5V, TJ = 25C IO = 10mA, VI = 2.85 to 16.5V Min. 1.237 1.225 Typ. 1.25 1.25 0.015 0.035 0.1 0.2 1.3 3 5.5 0.5 6.5 0.7 0.003 0.015 60 72 55 0.2 0.003 0.5 TA = 125C, 1000Hrs 0.5 120 5 Max. 1.263 1.275 0.2 0.2 0.3 0.4 1.5 10 Unit V V % % % % V mA A A %/W dB A A % % % VO VO Vd IO(min) Isc Load regulation Dropout voltage Minimum load current Short circuit current Thermal regulation IO = 10mA to 3A, TJ = 25C IO = 0 to 3A IO = 3A VI = 30V VI - VO = 5V VI - VO = 25V TA = 25C, 30ms pulse f = 120 Hz, CO = 25F,CADJ = 25 F, IO = 3A, VI = 6.25 3V VI = 4.25V, IO = 10 mA IO = 10mA to 3A, VI = 2.85 to 16.5V SVR IADJ IADJ eN S S Supply voltage rejection Adjust pin current Adjust pin current change (1) RMS output noise voltage (% of TA = 25C, f =10Hz to 10kHz VO) Temperature stability Long term stability 1. See short-circuit current curve for available output current at fixed dropout. 12/27 LD1085xx Typical application 6 Figure 4. Typical application (Unless otherwise specified TJ = 25 C, CI = CO = 10 F) 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 13/27 Typical application LD1085xx 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 14/27 LD1085xx Typical application Figure 16. Supply voltage rejection vs frequency Figure 17. Supply voltage rejection vs temperature Figure 18. Minimum load current vs temperature Figure 19. Stability Figure 20. Stability Figure 21. Line transient VI=12 to 13V, IO=200mA, CI = 1F(tant), CO=10F(tant), CADJ=1F 15/27 Typical application Figure 22. Line transient Figure 23. Load transient LD1085xx VI=12 to 13V, IO=200mA, CI = 1F(tant), CO=10F(tant), CADJ=1F VI=12V, IO=0.12 to 3A, CI = 1F(tant), CO=10F(tant), CADJ=1F Figure 24. Load transient VI=12V, IO=0.12 to 3A, CI = 1F(tant), CO=10F(tant), CADJ=1F 16/27 LD1085xx Package mechanical data 7 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. 17/27 Package mechanical data LD1085xx TO-220 mechanical data Dim. A C D D1 E F F1 F2 G G1 H2 L2 L4 L5 L6 L7 L9 DIA. 13.0 2.65 15.25 6.2 3.5 3.75 0.49 0.61 1.14 1.14 4.95 2.4 10.0 16.4 14.0 2.95 15.75 6.6 3.93 3.85 0.511 0.104 0.600 0.244 0.137 0.147 mm. Min. 4.40 1.23 2.40 1.27 0.70 0.88 1.70 1.70 5.15 2.7 10.40 0.019 0.024 0.044 0.044 0.194 0.094 0.393 0.645 0.551 0.116 0.620 0.260 0.154 0.151 Typ. Max. 4.60 1.32 2.72 Min. 0.173 0.048 0.094 0.050 0.027 0.034 0.067 0.067 0.203 0.106 0.409 inch. Typ. Max. 0.181 0.051 0.107 P011C 18/27 LD1085xx Package mechanical data TO-220FP mechanical data Dim. A B D E F F1 F2 G G1 H L2 L3 L4 L5 L6 L7 DIA. 28.6 9.8 2.9 15.9 9 3 mm. Min. 4.40 2.5 2.5 0.45 0.75 1.15 1.15 4.95 2.4 10.0 16 30.6 10.6 3.6 16.4 9.3 3.2 1.126 0.385 0.114 0.626 0.354 0.118 Typ Max. 4.60 2.7 2.75 0.70 1 1.50 1.50 5.2 2.7 10.40 Min. 0.173 0.098 0.098 0.017 0.030 0.045 0.045 0.194 0.094 0.393 0.630 1.204 0.417 0.142 0.645 0.366 0.126 inch. Typ. Max. 0.181 0.106 0.108 0.027 0.039 0.059 0.059 0.204 0.106 0.409 7012510A-H 19/27 Package mechanical data LD1085xx DPAK mechanical data mm. Dim. Min. A A1 A2 B b4 C C2 D D1 E E1 e e1 H L (L1) L2 L4 R V2 2.2 0.9 0.03 0.64 5.2 0.45 0.48 6 5.1 6.4 4.7 2.28 4.4 9.35 1 2.8 0.8 0.6 0.2 0 8 0 1 0.023 0.008 8 4.6 10.1 0.173 0.368 0.039 0.110 0.031 0.039 6.6 0.252 0.185 0.090 0.181 0.397 Typ. Max. 2.4 1.1 0.23 0.9 5.4 0.6 0.6 6.2 Min. 0.086 0.035 0.001 0.025 0.204 0.017 0.019 0.236 0.200 0.260 Typ. Max. 0.094 0.043 0.009 0.035 0.212 0.023 0.023 0.244 inch. 0068772-F 20/27 LD1085xx Package mechanical data D2PAK mechanical data mm. Dim. Min. A A1 A2 B B2 C C2 D D1 E E1 G L L2 L3 M R V2 0 4.88 15 1.27 1.4 2.4 0.4 8 0 10 8.5 5.28 15.85 1.4 1.75 3.2 0.192 0.590 0.050 0.055 0.094 0.016 8 4.4 2.49 0.03 0.7 1.14 0.45 1.23 8.95 8 10.4 0.393 0.335 0.208 0.624 0.055 0.068 0.126 Typ. Max. 4.6 2.69 0.23 0.93 1.7 0.6 1.36 9.35 Min. 0.173 0.098 0.001 0.027 0.044 0.017 0.048 0.352 0.315 0.409 Typ. Max. 0.181 0.106 0.009 0.036 0.067 0.023 0.053 0.368 inch. P011P6G 21/27 Package mechanical data LD1085xx D2PAK/A mechanical data mm. Dim. Min. A A1 A2 B B1 B2 C C2 D D1 E E1 G L L2 M R V2 0 4.88 15 1.27 2.4 0.4 8 0 10 8.5 5.28 15.85 1.4 3.2 0.192 0.591 0.050 0.094 0.016 8 4.40 2.49 0.03 0.7 0.8 1.14 0.45 1.23 8.95 8 10.4 0.394 0.335 0.208 0.624 0.055 0.126 Typ. Max. 4.60 2.69 0.23 0.93 1.3 1.7 0.60 1.36 9.35 Min. 0.173 0.098 0.001 0.028 0.031 0.045 0.018 0.048 0.352 0.315 0.409 Typ. Max. 0.181 0.106 0.009 0.037 0.051 0.067 0.024 0.054 0.368 inch. 7106164/D 22/27 LD1085xx Package mechanical data Tape & reel DPAK-PPAK mechanical data mm. Dim. Min. A C D N T Ao Bo Ko Po P 6.80 10.40 2.55 3.9 7.9 6.90 10.50 2.65 4.0 8.0 12.8 20.2 60 22.4 7.00 10.60 2.75 4.1 8.1 0.268 0.409 0.100 0.153 0.311 0.272 0.413 0.104 0.157 0.315 13.0 Typ. Max. 330 13.2 0.504 0.795 2.362 0.882 0.2.76 0.417 0.105 0.161 0.319 0.512 Min. Typ. Max. 12.992 0.519 inch. 23/27 Package mechanical data LD1085xx Tape & reel D2PAK-P2PAK-D2PAK/A-P2PAK/A mechanical data mm. Dim. Min. A C D N T Ao Bo Ko Po P 10.50 15.70 4.80 3.9 11.9 10.6 15.80 4.90 4.0 12.0 12.8 20.2 60 14.4 10.70 15.90 5.00 4.1 12.1 0.413 0.618 0.189 0.153 0.468 0.417 0.622 0.193 0.157 0.472 13.0 Typ. Max. 180 13.2 0.504 0.795 2.362 0.567 0.421 0.626 0.197 0.161 0.476 0.512 Min. Typ. Max. 7.086 0.519 inch. 24/27 LD1085xx Order codes 8 Table 10. Order codes Order codes Packages TO-220 TO-220FP D2 PAK DPAK (T&R) LD1085DT15R LD1085V18 LD1085V25 LD1085V33 LD1085V50 LD1085V LD1085P LD1085D2T-R LD1085D2M LD1085D2M-R LD1085D2T33R LD1085D2T18R LD1085DT18R LD1085DT25R LD1085DT33R LD1085D2M18R LD1085D2M25R LD1085D2M33R D PAK/A 2 D PAK/A (T&R) 2 Output voltage 1.5 V 1.8 V 2.5 V 3.3 V 5.0 V ADJ 25/27 Revision history LD1085xx 9 Table 11. Date Revision history Document revision history Revision 12 13 14 15 16 17 18 19 Mistake order codes - Table 1. Mistake U.M. load regulation - V ==> mV. Version 1.2 V removed. Order codes updated. Add package DPAK, typo on VO test value in tables 3, 4 and 11. Order codes updated. Order codes updated. Modified: Table 10. Changes 07-Oct-2004 08-Feb-2005 01-Mar-2005 22-May-2006 10-Nov-2006 04-Apr-2007 07-Jun-2007 05-Dec-2007 26/27 LD1085xx Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST's terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST'S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER'S OWN RISK. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. 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