LD1585C series 5A Low dropout fast response positive voltage regulator adjustable and fixed Features ■ Typical dropout 1.2V ■ Fast transient response ■ Three terminal adjustable or fixed output voltage 1.5V 1.8V, 2.5V, 2.85V, 3.3V, 5V, 8V, 9V ■ Guaranteed output current up to 5A ■ Output tolerance ±1% at 25°C and ±2% in full temperature range ■ Internal power and thermal limit ■ Wide operating temperature range 0°C to 125°C ■ Package available: TO-220, D2PAK/A ■ Pinout compatibility with standard adjustable VREG Description The LD1585C is a LOW DROP Voltage Regulator able to provide up to 5A of Output Current. Dropout is guaranteed at a maximum of 1.4V at the maximum output current, decreasing at lower loads. The device has been improved to be utilized in low voltage applications where transient response and minimum input voltage are critical. TO-220 D2PAK/A The most important feature of the device consist in lower dropout voltage and very fast transient response. A 2.85V 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 LD1585C quiescent current flows into the load, so increase efficiency. Only a 10µF minimum capacitor is need for stability. The device is supplied in TO-220, D2PAK and D2PAK/A. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within ±1% at 25°C. Order codes Part number TO-220 LD1585CV50 LD1585CV June 2007 D2PAK/A (T&R) Output voltage LD1585CD2M15R 1.5 V LD1585CD2M18R 1.8 V LD1585CD2M25R 2.5 V LD1585CD2M28R 2.85 V LD1585CD2M33R 3.3 V LD1585CD2M50R 5.0 V LD1585CD2M80R 8.0 V LD1585CD2M90R 9.0 V LD1585CD2M-R ADJ Rev. 5 1/25 www.st.com 25 LD1585C series Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 2/25 LD1585C series 1 Diagram Figure 1. Schematic diagram Diagram 3/25 Pin configuration LD1585C series 2 Pin configuration Figure 2. Pin connections (top view) TO-220 4/25 D2PAK/A LD1585C series Maximum ratings 3 Maximum ratings Table 1. 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 0 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 2. Thermal data Symbol Parameter TO-220 D2PAK/A Unit RthJC Thermal resistance junction-case 3 3 °C/W RthJA Thermal resistance junction-ambient 50 62.5 °C/W 5/25 Typical application 4 Typical application Figure 3. Application circuits LD1585C series VO = VREF(1+R2/R1) 6/25 LD1585C series Electrical characteristics 5 Electrical characteristics Table 3. Electrical characteristics of LD1585C#15 (VI=4.5V, CI = CO =10µF, TJ = 0 to 125°C, unless otherwise specified.) Symbol Parameter Test Conditions Min. Typ. Max. Unit 1.485 1.5 1.515 V 1.47 1.5 1.53 V 0.005 0.2 % IO = 0 mA, VI = 3 to 15V 0.005 0.2 % IO = 0 to 5A, TJ = 25°C 0.05 0.3 % IO = 0 to 5A 0.05 0.5 % IO = 0 mA, TJ = 25°C VO Output Voltage ΔVO Line Regulation ΔVO Load Regulation Vd Dropout Voltage IO = 5 A 1.2 1.4 V Iq Quiescent Current VI ≤25V 5 10 mA Isc Short Circuit Current VI - VO = 5V Thermal Regulation TJ = 25°C, 30ms pulse Supply Voltage Rejection f = 120 Hz, CO = 25µF, IO = 5A VI - VO = 3 ± 1V SVR eN IO = 0 to 5A, VI = 3 to 25V (1) IO = 0 mA, VI = 3 to 15V TJ = 25°C RMS Output Noise Voltage TJ = 25°C, f =10Hz to 10KHz (% of VO) S Temperature Stability S Long Term Stability TJ = 125°C, 1000Hrs 5.5 7 0.004 60 A 0.02 %/W 75 dB 0.003 % 0.5 % 0.03 1 % 1. See short-circuit current curve for available output current at fixed dropout. 7/25 Electrical characteristics Table 4. Symbol LD1585C series Electrical characteristics of LD1585C#18 (VI=4.8V, CI = CO =10µF, TJ = 0 to 125°C, unless otherwise specified.) Parameter Test Conditions Min. Typ. Max. Unit 1.782 1.8 1.818 V 1.764 1.8 1.836 V IO = 0 mA, VI = 3.3 to 15V, TJ = 25°C 0.005 0.2 IO = 0 mA, VI = 3.3 to 15V 0.005 0.2 IO = 0 to 5A, TJ = 25°C 0.05 0.3 IO = 0 to 5A 0.05 0.5 IO = 0 mA, TJ = 25°C VO Output Voltage ΔVO Line Regulation ΔVO Load Regulation Vd Dropout Voltage IO = 5 A 1.2 1.4 V Iq Quiescent Current VI ≤25V 5 10 mA Isc Short Circuit Current VI - VO = 5.5V Thermal Regulation TJ = 25°C, 30ms pulse Supply Voltage Rejection f = 120 Hz, CO = 25µF, IO = 5A VI - VO = 3 ± 1V SVR eN IO = 0 to 5A, VI = 3.3 to 25V (1) RMS Output Noise Voltage TJ = 25°C, f =10Hz to 10KHz (% of VO) S Temperature Stability S Long Term Stability TJ = 125°C, 1000Hrs 1. See short-circuit current curve for available output current at fixed dropout. 8/25 mV mV 5.5 7 0.004 60 A 0.02 %/W 75 dB 0.003 % 0.5 % 0.03 1 % LD1585C series Table 5. Symbol Electrical characteristics Electrical characteristics of LD1585C#25 (VI=5.5V, CI = CO =10µF, TJ = 0 to 125°C, unless otherwise specified.) Parameter Test Conditions Min. Typ. Max. Unit 2.475 2.5 2.525 V 2.45 2.5 2.55 V IO = 0 mA, VI = 4 to 15V, TJ = 25°C 0.005 0.2 IO = 0 mA, VI = 4 to 15V 0.005 0.2 IO = 0 to 5A, TJ = 25°C 0.05 0.3 IO = 0 to 5A 0.05 0.5 IO = 0 mA, TJ = 25°C VO Output Voltage ΔVO Line Regulation ΔVO Load Regulation Vd Dropout Voltage IO = 5 A 1.2 1.4 V Iq Quiescent Current VI ≤25V 5 10 mA Isc Short Circuit Current VI - VO = 5.5V Thermal Regulation TJ = 25°C, 30ms pulse Supply Voltage Rejection f = 120 Hz, CO = 25µF, IO = 5A VI - VO = 3 ± 1V SVR eN IO = 0 to 5A, VI = 4 to 25V (1) RMS Output Noise Voltage TJ = 25°C, f =10Hz to 10KHz (% of VO) S Temperature Stability S Long Term Stability TJ = 125°C, 1000Hrs mV mV 5.5 7 0.004 60 A 0.02 %/W 75 dB 0.003 % 0.5 % 0.03 1 % 1. See short-circuit current curve for available output current at fixed dropout. 9/25 Electrical characteristics Table 6. Symbol LD1585C series Electrical characteristics of LD1585C#285 (VI=5.85V, CI = CO =10µF, TJ = 0 to 125°C, unless otherwise specified.) Parameter Test Conditions Min. Typ. Max. Unit 2.821 2.85 2.879 V 2.793 2.85 2.907 V IO = 0 mA, VI = 4.5 to 15V, TJ = 25°C 0.005 0.2 IO = 0 mA, VI = 4.5 to 15V 0.005 0.2 IO = 0 to 5A, TJ = 25°C 0.05 0.3 IO = 0 to 5A 0.05 0.5 IO = 0 mA, TJ = 25°C VO Output Voltage ΔVO Line Regulation ΔVO Load Regulation Vd Dropout Voltage IO = 5 A 1.2 1.4 V Iq Quiescent Current VI ≤25V 5 10 mA Isc Short Circuit Current VI - VO = 5.5V Thermal Regulation TJ = 25°C, 30ms pulse Supply Voltage Rejection f = 120 Hz, CO = 25µF, IO = 5A VI - VO = 3 ± 1V SVR eN IO = 0 to 5A, VI = 4.5 to 25V (1) RMS Output Noise Voltage TJ = 25°C, f =10Hz to 10KHz (% of VO) S Temperature Stability S Long Term Stability TJ = 125°C, 1000Hrs 1. See short-circuit current curve for available output current at fixed dropout. 10/25 mV mV 5.5 7 0.004 60 A 0.02 %/W 75 dB 0.003 % 0.5 % 0.03 1 % LD1585C series Table 7. Symbol Electrical characteristics Electrical characteristics of LD1585C#33 (VI=6.3V, CI = CO =10µF, TJ = 0 to 125°C, unless otherwise specified.) Parameter Test Conditions Min. Typ. Max. Unit 3.267 3.3 3.333 V 3.234 3.35 3.366 V IO = 0 mA, VI = 4.8 to 15V, TJ = 25°C 0.005 0.2 IO = 0 mA, VI = 4.9 to 15V 0.005 0.2 IO = 0 to 5A, TJ = 25°C 0.05 0.3 IO = 0 to 5A 0.05 0.5 IO = 0 mA, TJ = 25°C VO Output Voltage ΔVO Line Regulation ΔVO Load Regulation Vd Dropout Voltage IO = 5 A 1.2 1.4 V Iq Quiescent Current VI ≤25V 5 10 mA Isc Short Circuit Current VI - VO = 5.5V Thermal Regulation TJ = 25°C, 30ms pulse Supply Voltage Rejection f = 120 Hz, CO = 25µF, IO = 5A VI - VO = 3 ± 1V SVR eN IO = 0 to 5A, VI = 4.8 to 25V (1) RMS Output Noise Voltage TJ = 25°C, f =10Hz to 10KHz (% of VO) S Temperature Stability S Long Term Stability TJ = 125°C, 1000Hrs mV mV 5.5 7 0.004 60 A 0.02 %/W 75 dB 0.003 % 0.5 % 0.03 1 % 1. See short-circuit current curve for available output current at fixed dropout. 11/25 Electrical characteristics Table 8. Symbol LD1585C series Electrical characteristics of LD1585C#50 (VI=8V, CI = CO =10µF, TJ = 0 to 125°C, unless otherwise specified.) Parameter Test Conditions Min. Typ. Max. Unit 4.95 5 5.05 V 4.9 5 5.1 V IO = 0 mA, VI = 6.5 to 20V, TJ = 25°C 0.005 0.2 IO = 0 mA, VI = 6.5 to 20V 0.005 0.2 IO = 0 to 5A, TJ = 25°C 0.05 0.3 IO = 0 to 5A 0.05 0.5 IO = 0 mA, TJ = 25°C VO Output Voltage ΔVO Line Regulation ΔVO Load Regulation Vd Dropout Voltage IO = 5 A 1.2 1.4 V Iq Quiescent Current VI ≤25V 5 10 mA Isc Short Circuit Current VI - VO = 5.5V Thermal Regulation TJ = 25°C, 30ms pulse Supply Voltage Rejection f = 120 Hz, CO = 25µF, IO = 5A VI - VO = 3 ± 1V SVR eN IO = 0 to 5A, VI = 6.5 to 30V (1) RMS Output Noise Voltage TJ = 25°C, f =10Hz to 10KHz (% of VO) S Temperature Stability S Long Term Stability TJ = 125°C, 1000Hrs 1. See short-circuit current curve for available output current at fixed dropout. 12/25 mV mV 5.5 7 0.004 60 A 0.02 %/W 75 dB 0.003 % 0.5 % 0.03 1 % LD1585C series Table 9. Symbol Electrical characteristics Electrical characteristics of LD1585C#80 (VI=11V, CI = CO =10µF, TJ = 0 to 125°C, unless otherwise specified.) Parameter Test Conditions Min. Typ. Max. Unit 7.92 8 8.08 V 7.84 8 8.16 V IO = 0 mA, VI = 9.5 to 20V, TJ = 25°C 0.005 0.2 IO = 0 mA, VI = 9.5 to 20V 0.005 0.2 IO = 0 to 5A, TJ = 25°C 0.05 0.3 IO = 0 to 5A 0.05 0.5 IO = 0 mA, TJ = 25°C VO Output Voltage ΔVO Line Regulation ΔVO Load Regulation Vd Dropout Voltage IO = 5 A 1.2 1.4 V Iq Quiescent Current VI ≤25V 5 10 mA Isc Short Circuit Current VI - VO = 5.5V Thermal Regulation TJ = 25°C, 30ms pulse Supply Voltage Rejection f = 120 Hz, CO = 25µF, IO = 5A VI - VO = 3 ± 1V SVR eN IO = 0 to 5A, VI = 9.5 to 30V (1) RMS Output Noise Voltage TJ = 25°C, f =10Hz to 10KHz (% of VO) S Temperature Stability S Long Term Stability TJ = 125°C, 1000Hrs mV mV 5.5 7 0.004 60 A 0.02 %/W 75 dB 0.003 % 0.5 % 0.03 1 % 1. See short-circuit current curve for available output current at fixed dropout. 13/25 Electrical characteristics Table 10. Symbol LD1585C series Electrical characteristics of LD1585C#90 (VI=12V, CI = CO =10µF, TJ = 0 to 125°C, unless otherwise specified.) Parameter Test Conditions Min. Typ. Max. Unit 8.91 9 9.09 V 8.82 9 9.18 V IO = 0 mA, VI = 10.5 to 20V, TJ = 25°C 0.005 0.2 IO = 0 mA, VI = 10.5 to 20V 0.005 0.2 IO = 0 to 5A, TJ = 25°C 0.05 0.3 IO = 0 to 5A 0.05 0.5 IO = 0 mA, TJ = 25°C VO Output Voltage ΔVO Line Regulation ΔVO Load Regulation Vd Dropout Voltage IO = 5 A 1.2 1.4 V Iq Quiescent Current VI ≤25V 5 10 mA Isc Short Circuit Current VI - VO = 5.5V Thermal Regulation TJ = 25°C, 30ms pulse Supply Voltage Rejection f = 120 Hz, CO = 25µF, IO = 5A VI - VO = 3 ± 1V SVR eN IO = 0 to 5A, VI = 10.5 to 30V (1) RMS Output Noise Voltage TJ = 25°C, f =10Hz to 10KHz (% of VO) S Temperature Stability S Long Term Stability TJ = 125°C, 1000Hrs 1. See short-circuit current curve for available output current at fixed dropout. 14/25 mV mV 5.5 7 0.004 60 A 0.02 %/W 75 dB 0.003 % 0.5 % 0.03 1 % LD1585C series Table 11. Symbol Electrical characteristics Electrical characteristics of LD1585C# (VI=4.25V, CI = CO =10µF, TJ = 0 to 125°C, unless otherwise specified.) Parameter Test Conditions Min. Typ. Max. Unit 1.237 1.25 1.263 V 1.225 1.25 1.275 V 0.015 0.2 % IO = 10mA, VI = 2.75 to 15V 0.1 0.2 % IO = 10mA to 5A, TJ = 25°C 0.1 0.3 % IO = 0 to 5A 0.25 0.5 % IO = 10mA, VI - VO = 3V, TJ = 25°C VO Output Voltage ΔVO Line Regulation ΔVO Load Regulation Vd Dropout Voltage IO = 5A 1.2 1.4 V Minimum Load Current VI = 25V 3 10 mA Short Circuit Current VI - VO = 5.5V Thermal Regulation TJ = 25°C, 30ms pulse SVR Supply Voltage Rejection f = 120 Hz, CO = 25µF, CADJ = 25µF, IO = 5A, VI - VO = 3 ± 1V IADJ Adjust Pin Current IO = 10 mA IO(min) Isc ΔIADJ eN IO = 10mA to 5A, VI - VO =1.5 to 25V IO = 10mA, VI = 2.75 to 15V TJ = 25°C Adjust Pin Current Change IO = 10mA to 5A, VI = 3 to 25V RMS Output Noise Voltage TJ = 25°C, f =10Hz to 10KHz (% of VO) S Temperature Stability S Long Term Stability (1) TJ = 125°C, 1000Hrs 5.5 7 0.004 (1) 60 A 0.02 75 %/W dB 50 100 µA 0.2 5 µA 0.003 % 0.5 % 0.5 % 1. See short-circuit current curve for available output current at fixed dropout. 15/25 Typical characteristics LD1585C series 6 Typical characteristics Figure 4. (unless otherwise specified TJ=25°C, CI=CO=10µF tant.) Output voltage vs temperature Figure 5. Short circuit current vs dropout voltage Figure 6. Line regulation vs temperature Figure 7. Line regulation vs temperature Figure 8. Load regulation vs temperature Figure 9. Load regulation vs temperature 16/25 LD1585C series Figure 10. Dropout voltage vs temperature Typical characteristics Figure 11. Dropout voltage vs output current Figure 12. Adjust pin current vs input voltage Figure 13. Adjust pin current vs temperature Figure 14. Adjust pin current change vs temperature Figure 15. Quiescent current vs temperature 17/25 Typical characteristics LD1585C series Figure 16. Reference voltage vs temperature Figure 17. Minimum load current vs temperature Figure 18. Supply voltage rejection vs output current Figure 19. Supply voltage rejection vs output current Figure 20. Supply voltage rejection vs frequency Figure 21. Supply voltage rejection vs frequency 18/25 LD1585C series Typical characteristics Figure 22. Supply voltage rejection vs temperature Figure 23. Supply voltage rejection vs temperature Figure 24. Line transient Figure 25. Load transient VI=15 to 16V, IO=200mA, CI = 1µF(tant), CO=10µF(tant) VI=15 V, IO=0.1 to 5 A, CI = 10µF(tant), CO=10µF(tant) Figure 26. Load transient VI=7 V, IO=0.1 to 5 A, CI = 10µF(tant), CO=10µF(tant) 19/25 Package mechanical data 7 LD1585C series Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® 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. 20/25 LD1585C series Package mechanical data D2PAK/A MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 4.40 4.60 0.173 0.181 A1 2.49 2.69 0.098 0.106 A2 0.03 0.23 0.001 0.009 B 0.7 0.93 0.028 0.037 B1 0.8 1.3 0.031 0.051 B2 1.14 1.7 0.045 0.067 C 0.45 0.60 0.018 0.024 C2 1.23 1.36 0.048 0.054 D 8.95 9.35 0.352 D1 E 8 10 E1 0.368 0.315 10.4 0.394 8.5 0.409 0.335 G 4.88 5.28 0.192 0.208 L 15 15.85 0.591 0.624 L2 1.27 1.4 0.050 0.055 M 2.4 3.2 0.094 R V2 0.4 0° 0.126 0.016 8° 0° 8° 7106164/D 21/25 Package mechanical data LD1585C series TO-220 MECHANICAL DATA DIM. mm. MIN. MAX. MIN. A 4.40 4.60 0.173 0.181 C 1.23 1.32 0.048 0.051 D 2.40 2.72 0.094 0.107 D1 TYP inch 1.27 TYP. MAX. 0.050 E 0.49 0.70 0.019 0.027 F 0.61 0.88 0.024 0.034 F1 1.14 1.70 0.044 0.067 F2 1.14 1.70 0.044 0.067 G 4.95 5.15 0.194 0.203 G1 2.4 2.7 0.094 0.106 H2 10.0 10.40 0.393 L2 16.4 0.409 0.645 L4 13.0 14.0 0.511 0.551 L5 2.65 2.95 0.104 0.116 L6 15.25 15.75 0.600 0.620 L7 6.2 6.6 0.244 0.260 L9 3.5 3.93 0.137 0.154 DIA. 3.75 3.85 0.147 0.151 P011C 22/25 LD1585C series Package mechanical data Tape & Reel D2PAK-P 2PAK-D 2PAK/A-P 2PAK/A MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. 180 13.0 7.086 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 MAX. 0.504 0.512 14.4 0.519 0.567 Ao 10.50 10.6 10.70 0.413 0.417 0.421 Bo 15.70 15.80 15.90 0.618 0.622 0.626 Ko 4.80 4.90 5.00 0.189 0.193 0.197 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 11.9 12.0 12.1 0.468 0.472 0.476 23/25 Revision history LD1585C series 8 Revision history Table 12. Revision history Date Revision 07-Oct-2004 3 Mistake order codes - Table 1. 20-Oct-2005 4 Order codes has been updated. 08-Jun-2007 5 Order codes has been updated and the document has been reformatted. 24/25 Changes LD1585C series 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. 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