LD1084 5 A low-drop positive voltage regulator adjustable Datasheet - production data LD1084 quiescent current flows into the load, so to increase the efficiency. A minimum capacitor of 10 µF is needed for stability. The device is supplied in TO-220. The on-chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 1% at 25 °C. Table 1. Device summary TO-220 Order code Output voltage LD1084V adjustable Features • Typical dropout 1.3 V (at 5 A) • Three-terminal adjustable output voltage • Guaranteed output current up to 5 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 • Pinout compatibility with standard adjustable VREG Description The LD1084 is a low-drop voltage regulator providing up to 5 A of output current. Dropout is guaranteed at a maximum of 1.5 V at the maximum output current, decreasing at lower loads. The LD1084 is pin-to-pin compatible with the older 3-terminal adjustable regulators, but it has better performances in terms of drop and output tolerance. Unlike PNP regulators, where a part of the output current is wasted as quiescent current, the September 2013 This is information on a product in full production. DocID9035 Rev 10 1/16 www.st.com 16 Contents LD1084 Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2/16 DocID9035 Rev 10 LD1084 1 Diagram Diagram Figure 1. Schematic diagram DocID9035 Rev 10 3/16 Pin configuration 2 LD1084 Pin configuration Figure 2. Pin connections (top view) ,1387 287387 $'- 4/16 DocID9035 Rev 10 LD1084 Maximum ratings 3 Maximum ratings Table 2. Absolute maximum ratings Symbol Parameter Value Unit 30 V VI DC input voltage IO Output current Internally limited mA PD Power dissipation Internally limited mW TSTG Storage temperature range -55 to +150 °C TOP 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 conditions is not implied. Table 3. Thermal data Symbol Parameter TO-220 Unit RthJC Thermal resistance junction-case 3 °C/W RthJA Thermal resistance junction-ambient 50 °C/W DocID9035 Rev 10 5/16 Schematic application 4 LD1084 Schematic application Figure 3. Application circuit R2 VO = V REF ⋅ 1 + ------- R1 6/16 DocID9035 Rev 10 LD1084 5 Electrical characteristics Electrical characteristics VI = 4.25 V, CI = CO = 10 µF, TA = -40 to 125 °C, unless otherwise specified. Table 4. LD1084 electrical characteristics Symbol Parameter Vref Reference voltage (1) ΔVO Line regulation Test conditions Min. Typ. Max. Unit IO = 10 mA TJ = 25 °C 1.237 1.25 1.263 V IO = 10 mA to 3 A, VI = 2.85 to 30 V 1.225 1.25 1.275 V IO = 10 mA, VI = 2.85 to 16.5V, TJ = 25 °C 0.015 0.2 % IO = 10 mA, VI = 2.85 to 16.5 V 0.035 0.2 % IO = 10 mA to 5 A, TJ = 25 °C 0.1 0.3 % IO = 0 to 5 A 0.2 0.4 % ΔVO Load regulation Vd Dropout voltage IO = 5 A 1.3 1.5 V Minimum load current VI = 30 V 3 10 mA IO(min) Isc Short-circuit current VI - VO = 5 V 5.5 6.5 A VI - VO = 25 V 0.5 0.7 A Thermal regulation TA = 25 °C, 30 ms pulse SVR Supply voltage rejection f = 120 Hz, CO = 25 µF, CADJ = 25 µF, IO = 5 A, VI = 6.25 ± 3 V IADJ Adjust pin current VI = 4.25 V, IO = 10 mA 55 120 μA ΔIADJ Adjust pin current change(1) IO = 10 mA to 5 A, VI = 2.85 to 16.5 V 0.2 5 μA eN RMS output noise voltage (% of VO) TA = 25 °C, f = 10 Hz to 10 kHz S Temperature stability S Long term stability TA = 125 °C, 1000 hrs 0.003 0.015 60 72 %/W dB 0.003 % 0.5 % 0.5 % 1. See short-circuit current curve for available output current at fixed dropout. DocID9035 Rev 10 7/16 Typical performance characteristics 6 LD1084 Typical performance characteristics Unless otherwise specified TJ = 25 °C, CI = 10 µF (tant.), CO = 22 µF (tant.) Figure 4. Short-circuit current vs. dropout Figure 5. Line regulation vs. temperature voltage Figure 6. Quiescent current vs. temperature Figure 7. Output voltage vs. temperature Figure 8. Load regulation vs. temperature Figure 9. Quiescent current vs. output voltage 8/16 DocID9035 Rev 10 LD1084 Typical performance characteristics Figure 10. Quiescent current vs. input voltage Figure 11. Dropout voltage vs. output current Figure 12. Supply voltage rejection vs. output current Figure 13. Dropout voltage vs. temperature Figure 14. Supply voltage rejection vs. temperature Figure 15. Supply voltage rejection vs. frequency DocID9035 Rev 10 9/16 Typical performance characteristics LD1084 Figure 16. Adjust pin current vs. output current Figure 17. Reference voltage vs. temperature Figure 18. Load regulation vs. temperature Figure 19. Adjust pin current vs. temperature Figure 20. Line regulation vs. temperature Figure 21. Minimum load current vs. temperature 10/16 DocID9035 Rev 10 LD1084 Typical performance characteristics Figure 22. Supply voltage rejection vs. temperature Figure 23. Supply voltage rejection vs. frequency Figure 24. Stability Figure 25. Supply voltage rejection vs. output current Figure 26. Stability Figure 27. Line transient VI=14 to 15 V, IO=200 mA, CI = 1 µF (tant), CO= 10 µF (tant), ts= tf = 5 µs DocID9035 Rev 10 11/16 Typical performance characteristics LD1084 Figure 28. Line transient Figure 29. Load transient VI=12 to 13 V, IO = 200 mA, CI = 1 µF (tant), CO= 10 µF (tant), No CADJ ts = tf = 5 µs VI =15 V, IO = 0.1 to 5 A, CI = 1 µF (tant), CO= 10 µF (tant) Figure 30. Load transient Figure 31. Line transient VI = 15 V, IO= 0.1 to 5 A, CI = 1 µF (tant), CO= 10 µF (tant), No CADJ VI=12 to 13 V, IO= 200 mA, CI = 1 µF (tant), CO= 10 µF(tant), CADJ = 1µF, ts = tf = 5 µs Figure 32. Load transient VI=13 V, IO= 0.1 to 5 A, CI = 1 µF(tant), CO=10 µF (tant) 12/16 DocID9035 Rev 10 LD1084 7 Package mechanical data 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: www.st.com. ECOPACK® is an ST trademark. Table 5. TO-220 mechanical data mm Dim. Min. Typ. Max. A 4.40 4.60 b 0.61 0.88 b1 1.14 1.70 c 0.48 0.70 D 15.25 15.75 E 10 10.40 e 2.40 2.70 e1 4.95 5.15 F 0.51 0.60 H1 6.20 6.60 J1 2.40 2.72 L 13 14 L1 3.50 3.93 L20 16.40 L30 28.90 ∅P 3.75 3.85 Q 2.65 2.95 DocID9035 Rev 10 13/16 Package mechanical data LD1084 Figure 33. TO-220 drawings BUHY' 14/16 DocID9035 Rev 10 LD1084 8 Revision history Revision history Table 6. Document revision history Date Revision 07-Oct-2004 3 Mistake order codes - Table 1. 08-Feb-2005 4 Mistake U.M. Load Regulation - V ==> mV. 16-Jun-2005 5 Order codes updated. 04-Apr-2007 6 Order code updated. 07-Jun-2007 7 Order codes updated. 08-Apr-2008 8 Modified: Table 1 on page 1. Removed: packages D²PAK, D²PAK/A and mechanical data. 29-Jul-2009 9 Modified: Table 1 on page 1. 10 RPN LD1084XX changed to LD1084. Updated the Description in cover page, Section 7: Package mechanical data, Figure 2: Pin connections (top view) and Figure 3: Application circuit. Minor text changes. 04-Sep-2013 Changes DocID9035 Rev 10 15/16 LD1084 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. ST PRODUCTS ARE NOT AUTHORIZED FOR USE IN WEAPONS. NOR ARE ST PRODUCTS DESIGNED OR AUTHORIZED FOR USE IN: (A) SAFETY CRITICAL APPLICATIONS SUCH AS LIFE SUPPORTING, ACTIVE IMPLANTED DEVICES OR SYSTEMS WITH PRODUCT FUNCTIONAL SAFETY REQUIREMENTS; (B) AERONAUTIC APPLICATIONS; (C) AUTOMOTIVE APPLICATIONS OR ENVIRONMENTS, AND/OR (D) AEROSPACE APPLICATIONS OR ENVIRONMENTS. WHERE ST PRODUCTS ARE NOT DESIGNED FOR SUCH USE, THE PURCHASER SHALL USE PRODUCTS AT PURCHASER’S SOLE RISK, EVEN IF ST HAS BEEN INFORMED IN WRITING OF SUCH USAGE, UNLESS A PRODUCT IS EXPRESSLY DESIGNATED BY ST AS BEING INTENDED FOR “AUTOMOTIVE, AUTOMOTIVE SAFETY OR MEDICAL” INDUSTRY DOMAINS ACCORDING TO ST PRODUCT DESIGN SPECIFICATIONS. PRODUCTS FORMALLY ESCC, QML OR JAN QUALIFIED ARE DEEMED SUITABLE FOR USE IN AEROSPACE BY THE CORRESPONDING GOVERNMENTAL AGENCY. 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. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2013 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 16/16 DocID9035 Rev 10