LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX Low drop fixed and adjustable positive voltage regulators Features Low dropout voltage: - 1.15 V typ. @ IOUT = 1 A, 25 C Very low quiescent current: - 5 mA typ. @ 25 C Output current up to 1 A Fixed output voltage of: - 1.2 V, 1.8 V, 2.5 V, 3.3 V Adjustable version availability (VREF = 1.25 V) Internal current and thermal limit Only 10 F for stability Available in 2% (at 25 C) and 4% in full temperature range High supply voltage rejection: - 80 dB typ. (at 25 C) Temperature range: 0 C to 125 C TO-220 SOT-223 DPAK common 10 F minimum capacitor is needed for stability. Chip trimming allows the regulator to reach a very tight output voltage tolerance, within 2% at 25 C. Description The LD1117Axx is a low drop voltage regulator able to provide up to 1 A of output current, available also in adjustable versions (VREF = 1.25 V). In fixed versions, the following output voltages are offered: 1.2 V, 1.8 V, 2.5 V and 3.3 V. The device is supplied in: SOT-223, DPAK and TO-220. Surface mounted packages optimize the thermal characteristics while offering a relevant space saving advantage. High efficiency is assured by an NPN pass transistor. Only a very Table 1. Device summary Order codes Output voltage SOT-223 DPAK LD1117AS12TR LD1117ADT12TR 1.2 V LD1117AS18TR LD1117ADT18TR 1.8 V LD1117AS33TR LD1117ADT33TR LD1117ASTR LD1117ADT-TR December 2011 TO-220 LD1117AV33 Doc ID 7194 Rev 24 3.3 V Adjustable from 1.25 V 1/24 www.st.com 24 Contents LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX 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 LD1117A adjustable: application note . . . . . . . . . . . . . . . . . . . . . . . . . 14 8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2/24 Doc ID 7194 Rev 24 LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX 1 Diagram Figure 1. Block diagram Doc ID 7194 Rev 24 Diagram 3/24 Pin configuration LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX 2 Pin configuration Figure 2. Pin connections (top view) TO-220 SOT-223 Note: 4/24 The TAB is connected to the VOUT. Doc ID 7194 Rev 24 DPAK LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX 3 Maximum ratings Table 2. Absolute maximum ratings Symbol Maximum ratings Parameter Value Unit VIN DC input voltage 15 V PD Power dissipation 12 W -40 to +150 C 0 to +125 C TSTG Storage temperature range TOP Operating junction temperature range Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Beyond the above suggested max. power dissipation, a short-circuit may permanently damage the device. Table 3. Thermal data Symbol Parameter RthJC Thermal resistance junction-case RthJA Thermal resistance junction-ambient SOT-223 DPAK TO-220 Unit 15 8 5 C/W 50 C/W Doc ID 7194 Rev 24 5/24 Schematic application LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX 4 Schematic application Figure 3. Application circuit (for other fixed output voltages) 6/24 Doc ID 7194 Rev 24 LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX 5 Electrical characteristics Electrical characteristics Refer to the test circuits, TJ = 0 to 125 C, CO = 10 F, CI = 10 F, R = 120 between OUTGND, unless otherwise specified. Table 4. Symbol Electrical characteristics of LD1117A#12 Parameter Test conditions Min. Typ. Max. Unit VO Output voltage VI = 5.3 V, IO = 10 mA, TJ = 25 C 1.176 1.2 1.224 V VO Output voltage IO = 0 to 1 A, VI = 2.75 to 10 V 1.152 1.2 1.248 V VO Line regulation VI = 2.75 to 8 V, IO = 0 mA 1 6 mV VO Load regulation VI = 2.75 V, IO = 0 to 1 A 1 10 mV VO Temperature stability VO Long term stability 1000 hrs, TJ = 125 C VI Operating input voltage IO = 100 mA Id Quiescent current VI 8 V, IO = 0 mA IO Output current VI - VO = 5 V, TJ = 25 C eN Output noise voltage B =10 Hz to 10 kHz, TJ = 25 C Supply voltage rejection IO = 40 mA, f = 120 Hz VI - VO = 3 V, Vripple = 1 VPP SVR VD Dropout voltage VO(pwr) Thermal regulation 0.5 % 0.3 % 5 1000 60 10 V 10 mA 1200 mA 100 V 80 dB IO = 100 mA 1 1.10 IO = 500 mA 1.05 1.15 IO = 1 A 1.15 1.30 Ta = 25 C, 30 ms pulse 0.08 0.2 Doc ID 7194 Rev 24 V %/W 7/24 Electrical characteristics LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX Refer to the test circuits, TJ = 0 to 125 C, CO = 10 F, CI = 10 F, unless otherwise specified. Table 5. Symbol Electrical characteristics of LD1117A#18 Parameter Test conditions Min. Typ. Max. Unit 1.8 1.836 V 1.872 V VO Output voltage VI = 3.8 V, IO = 10 mA, TJ = 25 C 1.764 VO Output voltage IO = 0 to 1 A, VI = 3.3 to 8 V 1.728 VO Line regulation VI = 3.3 to 8 V, IO = 0 mA 1 6 mV VO Load regulation VI = 3.3 V, IO = 0 to 1 A 1 10 mV VO Temperature stability VO Long term stability 1000 hrs, TJ = 125 C VI Operating input voltage IO = 100 mA Id Quiescent current VI 8 V, IO = 0 mA IO Output current VI - VO = 5 V, TJ = 25 C eN Output noise voltage B =10 Hz to 10 kHz, TJ = 25 C Supply voltage rejection IO = 40 mA, f = 120 Hz VI - VO = 3 V, Vripple = 1 VPP SVR VD Dropout voltage VO(pwr) Thermal regulation 8/24 0.5 % 0.3 % 5 10 V 10 mA 1000 60 mA 100 V 80 dB IO = 100 mA 1 1.10 IO = 500 mA 1.05 1.15 IO = 1 A 1.15 1.30 Ta = 25 C, 30 ms pulse 0.08 0.2 Doc ID 7194 Rev 24 V %/W LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX Electrical characteristics Refer to the test circuits, TJ = 0 to 125 C, CO = 10 F, CI = 10 F, unless otherwise specified. Table 6. Symbol Electrical characteristics of LD1117A#33 Parameter Test conditions Min. Typ. Max. Unit 3.3 3.366 V 3.432 V VO Output voltage VI = 5.3 V, IO = 10 mA, TJ = 25 C 3.234 VO Output voltage IO = 0 to 1 A, VI = 4.75 to 10 V 3.168 VO Line regulation VI = 4.75 to 8 V, IO = 0 mA 1 6 mV VO Load regulation VI = 4.75 V, IO = 0 to 1 A 1 10 mV VO Temperature stability VO Long term stability 1000 hrs, TJ = 125 C VI Operating input voltage IO = 100 mA Id Quiescent current VI 10 V, IO = 0 mA IO Output current VI - VO = 5 V, TJ = 25 C eN Output noise voltage B =10 Hz to 10 kHz, TJ = 25 C Supply voltage rejection IO = 40 mA, f = 120 Hz VI - VO = 3 V, Vripple = 1 VPP SVR VD Dropout voltage VO(pwr) Thermal regulation 0.5 % 0.3 % 5 1000 60 10 V 10 mA 1200 mA 100 V 75 dB IO = 100 mA 1 1.10 IO = 500 mA 1.05 1.15 IO = 1 A 1.15 1.30 Ta = 25 C, 30 ms pulse 0.08 0.2 Doc ID 7194 Rev 24 V %/W 9/24 Electrical characteristics LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX Refer to the test circuits, TJ = 0 to 125 C, CO = 10 F, CI = 10 F, unless otherwise specified. Table 7. Symbol Electrical characteristics of LD1117A (Adjustable) Parameter Test conditions Min. Typ. Max. Unit 1.225 1.25 1.275 V 1.3 V VO Reference voltage VI = 5.3 V, IO = 10 mA, TJ = 25 C VO Reference voltage IO = 10 mA to 1 A, VI = 2.75 to 10 V VO Line regulation VI = 2.75 to 8 V, IO = 0 mA 1 6 mV VO Load regulation VI = 2.75 V, IO = 0 to 1 A 1 10 mV VO Temperature stability VO Long term stability 1000 hrs, TJ = 125 C VI Operating input voltage IO = 100 mA Iadj Adjustment pin current Vin 10 V Iadj Adjustment pin current change IO(min) 1.2 0.5 % 0.3 % 10 V 60 120 A Vin - VO = 1.4 to 10 V, IO = 10 mA to 1 A 1 5 A Minimum load current Vin = 10 V 2 5 mA IO Output current VI - VO = 5 V, TJ = 25 C eN Output noise voltage B =10 Hz to 10 kHz, TJ = 25 C Supply voltage rejection IO = 40 mA, f = 120 Hz VI - VO = 3 V, Vripple = 1 VPP SVR VD Dropout voltage VO(pwr) Thermal regulation 10/24 1000 60 1200 mA 100 V 80 dB IO = 100 mA 1 1.10 IO = 500 mA 1.05 1.15 IO = 1 A 1.15 1.30 Ta = 25 C, 30 ms pulse 0.08 0.2 Doc ID 7194 Rev 24 V %/W LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX 6 Typical application Figure 4. Negative supply Figure 5. Active terminator for SCSI-2 bus Figure 6. Circuit for increasing output voltage Doc ID 7194 Rev 24 Typical application 11/24 Typical application LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX Figure 7. Voltage regulator with reference Figure 8. Battery backed-up regulated supply 12/24 Doc ID 7194 Rev 24 LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX Figure 9. Typical application Post-regulated dual supply Doc ID 7194 Rev 24 13/24 LD1117A adjustable: application note LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX 7 LD1117A adjustable: application note The LD1117A adjustable has a thermal stabilized 1.25 0.012 V reference voltage between the OUT and ADJ pins. IADJ is 60 A typ. (120 A max.) and IADJ is 1 A typ. (5 A max.). R1 is normally fixed to 120 . From Figure 7 the following is obtained: VOUT = VREF + R2 (IADJ + IR1) = VREF + R2 (IADJ +VREF /R1) = VREF (1 + R2 / R1) + R2 x IADJ. In normal applications the R2 value is in the range of a few k, so the R2 x IADJ product can not be considered in the VOUT calculation; the above expression then becomes: VOUT = VREF (1 + R2 / R1). In order to have a better load regulation it is important to realize a good Kelvin connection of R1 and R2 resistors. In particular, the R1 connection must be realized very close to the OUT and ADJ pins, while the R2 ground connection must be placed as near as possible to the negative load pin. Ripple rejection can be improved by introducing a 10 F electrolytic capacitor placed in parallel to the R2 resistor (see Figure 10). Figure 10. Adjustable output voltage application Figure 11. Adjustable output voltage application with improved ripple rejection 14/24 Doc ID 7194 Rev 24 LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX 8 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK(R) 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 8. TO-220 mechanical data Type STD - ST Dual Gauge Type STD - ST Single Gauge mm. mm. Dim. Min. Typ. Max. Min. Typ. Max. A 4.40 4.60 4.40 4.60 b 0.61 0.88 0.61 0.88 b1 1.14 1.70 1.14 1.70 c 0.48 0.70 0.48 0.70 D 15.25 15.75 15.25 15.75 D1 1.27 E 10.00 10.40 10.00 10.40 e 2.40 2.70 2.40 2.70 e1 4.95 5.15 4.95 5.15 F 1.23 1.32 0.51 0.60 H1 6.20 6.60 6.20 6.60 J1 2.40 2.72 2.40 2.72 L 13.00 14.00 13.00 14.00 L1 3.50 3.93 3.50 3.93 L20 16.40 16.40 L30 28.90 28.90 P 3.75 3.85 3.75 3.85 Q 2.65 2.95 2.65 2.95 Despite some difference in tolerances, the packages are compatible. Doc ID 7194 Rev 24 15/24 Package mechanical data LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX Figure 12. Drawing dimension TO-220 (type STD-ST Dual Gauge) 0015988_S Note: 16/24 1 Maximum resin gate protrusion: 0.5 mm. 2 An accepted resin gate protrusion can be found in each of the two positions shown on the drawing, or in their symmetrical position with respect to the vertical axis. Doc ID 7194 Rev 24 LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX Package mechanical data Figure 13. Drawing dimension TO-220 (type STD-ST Single Gauge) 8174627_B Doc ID 7194 Rev 24 17/24 Package mechanical data LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX Figure 14. Drawing dimension tube for TO-220 Dual Gauge (mm.) Figure 15. Drawing dimension tube for TO-220 Single Gauge (mm.) 18/24 Doc ID 7194 Rev 24 LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX Package mechanical data SOT-223 mechanical data mm. mils. Dim. Min. Typ. A Max. Min. Typ. 1.8 A1 0.02 B 0.6 B1 Max. 70.9 0.1 0.8 3.9 0.7 0.85 23.6 27.6 33.5 2.9 3 3.15 114.2 118.1 124.0 c 0.24 0.26 0.35 9.4 10.2 13.8 D 6.3 6.5 6.7 248.0 255.9 263.8 e 2.3 90.6 e1 4.6 181.1 E 3.3 3.5 3.7 129.9 137.8 145.7 H 6.7 7 7.3 263.8 275.7 287.5 V 10 10 0046067/H Doc ID 7194 Rev 24 19/24 Package mechanical data LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX DPAK mechanical data mm. inch. Dim. Min. A A1 A2 B b4 C C2 D D1 E E1 e e1 H L (L1) L2 L4 R V2 Typ. 2.2 0.9 0.03 0.64 5.2 0.45 0.48 6 Max. Min. 2.4 1.1 0.23 0.9 5.4 0.6 0.6 6.2 0.086 0.035 0.001 0.025 0.204 0.017 0.019 0.236 6.6 0.252 5.1 6.4 0.260 0.173 0.368 0.039 2.8 0.8 0.181 0.397 0.110 0.031 1 0.023 0.2 0 0.094 0.043 0.009 0.035 0.212 0.023 0.023 0.244 0.185 0.090 4.6 10.1 0.6 Max. 0.200 4.7 2.28 4.4 9.35 1 Typ. 0.039 0.008 8 0 8 0068772-F 20/24 Doc ID 7194 Rev 24 LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX Package mechanical data Tape & reel SOT223 mechanical data mm. inch. Dim. Min. Typ. A Max. Min. Typ. 330 13.0 12.992 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 6.73 6.83 6.93 0.265 0.269 0.273 Bo 7.32 7.42 7.52 0.288 0.292 0.296 Ko 1.78 2 0.070 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 7.9 8.0 8.1 0.311 0.315 0.319 Doc ID 7194 Rev 24 0.078 21/24 Package mechanical data LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX Tape & reel DPAK-PPAK mechanical data mm. inch. Dim. Min. Typ. A Min. Typ. 330 13.0 13.2 Max. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 22/24 Max. 0.504 0.512 22.4 0.519 0.882 Ao 6.80 6.90 7.00 0.268 0.272 0.2.76 Bo 10.40 10.50 10.60 0.409 0.413 0.417 Ko 2.55 2.65 2.75 0.100 0.104 0.105 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 7.9 8.0 8.1 0.311 0.315 0.319 Doc ID 7194 Rev 24 LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX 9 Revision history Table 9. Document revision history Revision history Date Revision Changes 29-Sep-2004 11 Add new part number. 12-Oct-2004 12 Mistake VO max. - Table 4. 21-Apr-2005 13 Add new package - DPAK/A. 05-Jul-2005 14 The DPAK mechanical data updated. 10-Feb-2006 15 Add new package - DPAK/A (B type). 20-Dec-2006 16 Change value VIN on Table 2. 19-Jan-2007 17 DPAK/A mechanical data updated and add footprint data. 28-May-2007 18 Add IADJ and IADJ values on Table 7. 07-Jun-2007 19 Add IO(min) value on Table 7. 15-Apr-2008 20 Modified: Table 10. 28-Jul-2009 21 Modified: Table 10. 05-Jul-2010 22 Added: Table 8 on page 15, Figure 12 on page 16, Figure 13 on page 17, Figure 14 and Figure 15 on page 18. 16-Nov-2010 23 Modified: Table 1 on page 1, RthJC value for TO-220 Table 3 on page 5. 16-Dec-2011 24 Modified: VO parameter output voltage ==> Reference voltage Table 7 on page 10. Doc ID 7194 Rev 24 23/24 LD1117AXX12, LD1117AXX18, LD1117AXX33, LD1117AXX 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. 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