LD1084V12

LD1084xx 5 A low drop positive voltage regulator adjustable and fixed Features ■ Typical dropout 1.3 V (at 5 A) ■ Three terminal adjustable or fixed output voltage 2.5 V, 5 V, 12 V. ■ 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 TO-220 The device is supplied in TO-220. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 1 % at 25 °C. Description The LD1084xx is a low drop voltage regulator able to provide 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 LD1084xx 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 LD1084xx quiescent current flows into the load, so increase efficiency. Only a 10 µF minimum capacitor is need for stability. Table 1. April 2008 Device summary Part numbers Order codes Output voltage LD1084XX12 LD1084V12 12 V LD1084XX25 LD1084V25 2.5 V LD1084XX50 LD1084V50 5.0 V LD1084XX LD1084V Adjustable Rev 8 1/19 www.st.com 19 Contents LD1084xx Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2/19 LD1084xx Diagram 1 Diagram Figure 1. Schematic diagram 3/19 Pin configuration 2 Pin configuration Figure 2. Pin connections (top view) 4/19 LD1084xx LD1084xx 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 condition 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 5/19 Schematic application 4 Schematic application Figure 3. Application circuit LD1084xx R V O = V REF ⋅ ⎛ 1 + ------2-⎞ ⎝ R 1⎠ 6/19 LD1084xx Electrical characteristics 5 Electrical characteristics Table 4. Electrical characteristics of LD1084#25 (VI = 5.5 V, CI = CO = 10 µF, TA = -40 to 125 °C, unless otherwise specified). Symbol Parameter Test condition Min. Typ. Max. Unit IO = 0 mA, TJ = 25°C 2.475 2.5 2.525 V IO = 0 to 5A, VI = 4.1 to 30V 2.45 2.5 2.55 V IO = 0 mA, VI = 4.1 to 18V, TJ = 25°C 0.5 6 mV IO = 0 mA, VI = 4.1 to 18V 0.1 6 mV IO = 0 to 5A, TJ = 25°C 3 15 mV IO = 0 to 5A 7 20 mV VO Output voltage (1) ΔVO Line regulation ΔVO Load regulation Vd Dropout voltage IO = 5A 1.3 1.5 V Iq Quiescent current VI ≤ 30V 5 10 mA Isc Short circuit current SVR eN VI - VO = 5V 5.5 6.5 A VI - VO = 25V 0.5 0.7 A Thermal regulation TA = 25°C, 30ms pulse Supply voltage rejection f = 120 Hz, CO = 25µF, IO = 5A VI = 7.5 ± 3V RMS output noise voltage (% of VO) TA = 25°C, f = 10Hz to 10kHz S Temperature stability S Long term stability TA = 125°C, 1000Hrs 0.003 0.015 60 %/W 72 dB 0.003 % 0.5 % 0.5 % 1. See short-circuit current curve for available output current at fixed dropout. 7/19 Electrical characteristics Table 5. Symbol LD1084xx Electrical characteristics of LD1084#50 (VI = 8 V, CI = CO = 10 µF, TA = -40 to 125 °C, unless otherwise specified). Parameter Test condition Min. Typ. Max. Unit IO = 0 mA, TJ = 25°C 4.95 5 5.05 V IO = 0 to 5A, VI = 6.6 to 30V 4.9 5 5.1 V 0.5 10 mV IO = 0 mA, VI = 6.6 to 20V 1 10 mV IO = 0 to 5A, TJ = 25°C 5 20 mV IO = 0 to 5A 10 35 mV VO Output voltage (1) ΔVO Line regulation ΔVO Load regulation Vd Dropout voltage IO = 5A 1.3 1.5 V Iq Quiescent current VI ≤ 30V 5 10 mA Isc Short circuit current SVR eN IO = 0 mA, VI = 6.6 to 20V, TJ = 25°C VI - VO = 5V 5.5 6.5 A VI - VO = 25V 0.5 0.7 A Thermal regulation TA = 25°C, 30ms pulse Supply voltage rejection f = 120 Hz, CO = 25µF, IO = 5A VI = 10 ± 3V RMS output noise voltage (% of VO) TA = 25°C, f =10Hz to 10kHz S Temperature stability S Long term stability TA = 125°C, 1000Hrs 1. See short-circuit current curve for available output current at fixed dropout. 8/19 0.003 0.015 60 %/W 72 dB 0.003 % 0.5 % 0.5 % LD1084xx Table 6. Symbol VO ΔVO Electrical characteristics Electrical characteristics of LD1084#12 (VI = 15 V, CI = CO = 10 µF, TA = -40 to 125 °C, unless otherwise specified). Parameter Output voltage (1) Line regulation Test condition Min. Typ. Max. Unit IO = 0 mA, TJ = 25°C 11.88 12 12.12 V IO = 0 to 5A, VI = 13.6 to 30V 11.76 12 12.24 V IO = 0 mA, VI = 13.6 to 25V, TJ = 25°C 2 25 mV IO = 0 mA, VI = 13.6 to 25V 4 25 mV IO = 0 to 5A, TJ = 25°C 12 36 mV IO = 0 to 5A 24 72 mV ΔVO Load regulation Vd Dropout voltage IO = 5A 1.3 1.5 V Iq Quiescent current VI ≤ 30V 5 10 mA Isc Short circuit current SVR eN VI - VO = 5V 5.5 6.5 A VI - VO = 25V 0.5 0.7 A Thermal regulation TA = 25°C, 30ms pulse Supply voltage rejection f = 120 Hz, CO = 25µF, IO = 5A VI = 17 ± 3V RMS output noise voltage (% of VO) TA = 25°C, f =10Hz to 10kHz S Temperature stability S Long term stability TA = 125°C, 1000Hrs 0.003 0.015 54 %/W 66 dB 0.003 % 0.5 % 0.5 % 1. See short-circuit current curve for available output current at fixed dropout. 9/19 Electrical characteristics Table 7. Symbol VO ΔVO LD1084xx Electrical characteristics of LD1084 (VI = 4.25 V, CI = CO =10 µF, TA = -40 to 125 °C, unless otherwise specified). Parameter Test condition Output voltage (1) Line regulation Min. Typ. Max. Unit IO = 10mA TJ = 25°C 1.237 1.25 1.263 V IO = 10mA to 3A, VI = 2.85 to 30V 1.225 1.25 1.275 V IO = 10mA, VI = 2.85 to 16.5V, TJ = 25°C 0.015 0.2 % IO = 10mA, VI = 2.85 to 16.5V 0.035 0.2 % IO = 10mA to 5A, TJ = 25°C 0.1 0.3 % IO = 0 to 5A 0.2 0.4 % ΔVO Load regulation Vd Dropout voltage IO = 5A 1.3 1.5 V Minimum load current VI = 30V 3 10 mA IO(min) Isc Short circuit current VI - VO = 5V 5.5 6.5 A VI - VO = 25V 0.5 0.7 A Thermal regulation TA = 25°C, 30ms pulse SVR Supply voltage rejection f = 120 Hz, CO = 25µF,CADJ = 25 µF, IO = 5A, VI = 6.25 ± 3V IADJ Adjust pin current ΔIADJ Adjust pin current change eN RMS output noise voltage (% of VO) S Temperature stability S Long term stability (1) 60 72 %/W dB VI = 4.25V, IO = 10 mA 55 120 μA IO = 10mA to 5A, VI = 2.85 to 16.5V 0.2 5 μA TA = 25°C, f =10Hz to 10kHz TA = 125°C, 1000Hrs 1. See short-circuit current curve for available output current at fixed dropout. 10/19 0.003 0.015 0.003 % 0.5 % 0.5 % LD1084xx Typical application 6 Typical application Figure 4. Unless otherwise specified TJ = 25°C, CI = 10µF (tant.), CO = 22µF (tant.) 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 11/19 Typical application LD1084xx 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 12/19 LD1084xx Typical application 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 13/19 Typical application LD1084xx 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 15V, IO=200mA,CI = 1µF(tant), CO=10µF(tant), ts=tf=5ms 14/19 LD1084xx Typical application Figure 28. Line transient Figure 29. Load transient VI=12 to 13V, IO=200mA, CI = 1µF(tant), CO=10µF(tant), No CADJ ts=tf=5μs VI=15 V, IO=0.1 to 5 A, CI = 1µF(tant), CO=10µF(tant) Figure 30. Load transient Figure 31. Line transient VI=15 V, IO=0.1 to 5 A, CI = 1µF(tant), CO=10µF(tant), No CADJ VI=12 to 13V, IO=200mA, CI = 1µF(tant), CO=10µF(tant), CADJ = 1μF ts=tf=5μs Figure 32. Load Transient VI=13 V, IO=0.1 to 5 A, CI = 1µF(tant), CO=10µF(tant) 15/19 Package mechanical data 7 LD1084xx 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. 16/19 LD1084xx Package mechanical data 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 D1 Typ. inch. 1.27 Typ. Max. 0.107 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 L4 16.4 13.0 0.409 0.645 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 17/19 Revision history LD1084xx 8 Revision history Table 8. 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. 18/19 Changes LD1084xx Please Read Carefully: Information in this document is provided solely in connection with ST products. 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