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 SOT-223 TO-220 ■ Fixed output voltage of: 1.2 V, 1.8 V, 2.5 V, 3.3 V ■ Adjustable version availability (VREL = 1.25 V) ■ Internal current and thermal limit ■ Only 10 µF 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 D2PAK/A DPAK stability. Only chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 2 % at 25 °C. Description The LD1117A is a low drop voltage regulator able to provide up to 1 A of output current, available even in adjustable version (VREF = 1.25 V). Concerning fixed versions, are offered the following Output Voltages: 1.2 V, 1.8 V, 2.5 V and 3.3 V. The device is supplied in: SOT-223, DPAK, D²PAK/A and TO-220. Surface mount packages optimize the thermal characteristics even offering a relevant space saving effect. High efficiency is assured by NPN pass transistor. Only a very common 10 µF minimum capacitor is needed for Table 1. Device summary Part numbers LD1117AXX12 LD1117AXX33 LD1117AXX18 LD1117AXX LD1117AXX25 April 2008 Rev 20 1/29 www.st.com 29 Contents LD1117Axx Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 7 LD1117A adjustable: application note . . . . . . . . . . . . . . . . . . . . . . . . . 15 8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 9 Order codes 10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 2/29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 LD1117Axx Diagram 1 Diagram Figure 1. Block diagram 3/29 Pin configuration 2 Pin configuration Figure 2. Pin connections (top view) SOT-223 TO-220 Note: 4/29 The TAB is connected to the VOUT. LD1117Axx DPAK D2PAK/A LD1117Axx Maximum ratings 3 Maximum ratings Table 2. Absolute maximum ratings Symbol 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. Over the above suggested max power dissipation a short circuit could definitively damage the device. Table 3. Thermal data Symbol Parameter RthJC Thermal resistance junction-case RthJA Thermal resistance junction-ambient SOT-223 D²PAK/A DPAK TO-220 Unit 15 3 8 3 °C/W 50 °C/W 5/29 Schematic application 4 Schematic application Figure 3. Application circuit (for other fixed output voltages) 6/29 LD1117Axx LD1117Axx Electrical characteristics 5 Electrical characteristics Table 4. Electrical characteristics of LD1117A#12 (refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, CI = 10 µF, R = 120 Ω between OUTGND, unless otherwise specified). Symbol Parameter Test conditions Min. Typ. Max. Unit VO Output voltage VI = 5.3V, IO = 10mA, TJ = 25°C 1.176 1.2 1.224 V VO Output voltage IO = 0 to 1A, VI = 2.75 to 10V 1.152 1.2 1.248 V ΔVO Line regulation VI = 2.75 to 8V, IO = 0mA 1 6 mV ΔVO Load regulation VI = 2.75V, IO = 0 to 1A 1 10 mV ΔVO Temperature stability ΔVO Long term stability 1000 hrs, TJ = 125°C VI Operating input voltage IO = 100mA Id Quiescent current VI ≤ 8V, IO = 0mA IO Output current VI - VO = 5V, TJ = 25°C eN Output noise voltage B =10Hz to 10kHz, TJ = 25°C Supply voltage rejection IO = 40mA, f = 120Hz VI - VO = 3V, Vripple = 1VPP SVR VD Dropout voltage ΔVO(pwr) Thermal regulation 0.5 % 0.3 % 5 1000 60 10 V 10 mA 1200 mA 100 µV 80 dB IO = 100mA 1 1.10 IO = 500mA 1.05 1.15 IO = 1A 1.15 1.30 Ta = 25°C, 30ms Pulse 0.08 0.2 V %/W 7/29 Electrical characteristics Table 5. Symbol LD1117Axx Electrical characteristics of LD1117A#18 (refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, CI = 10 µF unless otherwise specified). Parameter Test conditions Min. Typ. Max. Unit 1.8 1.836 V 1.872 V VO Output voltage VI = 3.8V, IO = 10mA, TJ = 25°C 1.764 VO Output voltage IO = 0 to 1A, VI = 3.3 to 8V 1.728 ΔVO Line regulation VI = 3.3 to 8V, IO = 0mA 1 6 mV ΔVO Load regulation VI = 3.3V, IO = 0 to 1A 1 10 mV ΔVO Temperature stability ΔVO Long term stability 1000 hrs, TJ = 125°C VI Operating input voltage IO = 100mA Id Quiescent current VI ≤ 8V, IO = 0mA IO Output current VI - VO = 5V, TJ = 25°C eN Output noise voltage B =10Hz to 10kHz, TJ = 25°C Supply voltage rejection IO = 40mA, f = 120Hz VI - VO = 3V, Vripple = 1VPP SVR VD Dropout voltage ΔVO(pwr) Thermal regulation 8/29 0.5 % 0.3 % 5 10 V 10 mA 1000 60 mA 100 µV 80 dB IO = 100mA 1 1.10 IO = 500mA 1.05 1.15 IO = 1A 1.15 1.30 Ta = 25°C, 30ms Pulse 0.08 0.2 V %/W LD1117Axx Table 6. Symbol Electrical characteristics Electrical characteristics of LD1117A#25 (refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, CI = 10 µF unless otherwise specified). Parameter Test conditions Min. Typ. Max. Unit 2.5 2.55 V 2.6 V VO Output voltage VI = 4.5V, IO = 10mA, TJ = 25°C 2.45 VO Output voltage IO = 0 to 1A, VI = 3.9 to 8V 2.4 ΔVO Line regulation VI = 3.9 to 8V, IO = 0mA 1 6 mV ΔVO Load regulation VI = 3.9V, IO = 0 to 1A 1 10 mV ΔVO Temperature stability ΔVO Long term stability 1000 hrs, TJ = 125°C VI Operating input voltage IO = 100mA Id Quiescent current VI ≤ 10V, IO = 0mA IO Output current VI - VO = 5V, TJ = 25°C eN Output noise voltage B =10Hz to 10kHz, TJ = 25°C Supply voltage rejection IO = 40mA, f = 120Hz VI - VO = 3V, Vripple = 1VPP SVR VD Dropout voltage ΔVO(pwr) Thermal regulation 0.5 % 0.3 % 5 1000 60 10 V 10 mA 1200 mA 100 µV 80 dB IO = 100mA 1 1.10 IO = 500mA 1.05 1.15 IO = 1A 1.15 1.30 Ta = 25°C, 30ms Pulse 0.08 0.2 V %/W 9/29 Electrical characteristics Table 7. Symbol LD1117Axx Electrical characteristics of LD1117A#33 (refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, CI = 10 µF unless otherwise specified). Parameter Test conditions Min. Typ. Max. Unit 3.3 3.366 V 3.432 V VO Output voltage VI = 5.3V, IO = 10mA, TJ = 25°C 3.234 VO Output voltage IO = 0 to 1A, VI = 4.75 to 10V 3.168 ΔVO Line regulation VI = 4.75 to 8V, IO = 0mA 1 6 mV ΔVO Load regulation VI = 4.75V, IO = 0 to 1A 1 10 mV ΔVO Temperature stability ΔVO Long term stability 1000 hrs, TJ = 125°C VI Operating input voltage IO = 100mA Id Quiescent current VI ≤ 10V, IO = 0mA IO Output current VI - VO = 5V, TJ = 25°C eN Output noise voltage B =10Hz to 10kHz, TJ = 25°C Supply voltage rejection IO = 40mA, f = 120Hz VI - VO = 3V, Vripple = 1VPP SVR VD Dropout voltage ΔVO(pwr) Thermal regulation 10/29 0.5 % 0.3 % 5 1000 60 10 V 10 mA 1200 mA 100 µV 75 dB IO = 100mA 1 1.10 IO = 500mA 1.05 1.15 IO = 1A 1.15 1.30 Ta = 25°C, 30ms Pulse 0.08 0.2 V %/W LD1117Axx Table 8. Symbol Electrical characteristics Electrical characteristics of LD1117A (Adjustable) (refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, CI = 10 µF unless otherwise specified). Parameter Test conditions Min. Typ. Max. Unit 1.225 1.25 1.275 V 1.3 V VO Output voltage VI = 5.3V, IO = 10mA, TJ = 25°C VO Output voltage IO = 0 to 1A, VI = 2.75 to 10V ΔVO Line regulation VI = 2.75 to 8V, IO = 0mA 1 6 mV ΔVO Load regulation VI = 2.75V, IO = 0 to 1A 1 10 mV ΔVO Temperature stability ΔVO Long term stability 1000 hrs, TJ = 125°C VI Operating input voltage IO = 100mA Iadj Adjustment pin current Vin ≤ 10 V ΔIadj Adjustment pin current change IO(min) 1.2 0.5 % 0.3 % 10 V 60 120 µA Vin - VO = 1.4 to 10 V, IO = 10mA to 1A 1 5 µA Minimum load current Vin = 10 V 2 5 mA IO Output current VI - VO = 5V, TJ = 25°C eN Output noise voltage B =10Hz to 10kHz, TJ = 25°C Supply voltage rejection IO = 40mA, f = 120Hz VI - VO = 3V, Vripple = 1VPP SVR VD Dropout voltage ΔVO(pwr) Thermal regulation 1000 60 1200 mA 100 µV 80 dB IO = 100mA 1 1.10 IO = 500mA 1.05 1.15 IO = 1A 1.15 1.30 Ta = 25°C, 30ms Pulse 0.08 0.2 V %/W 11/29 Typical application 6 Typical application Figure 4. Negative supply Figure 5. Active terminator for SCSI-2 bus Figure 6. Circuit for increasing output voltage 12/29 LD1117Axx LD1117Axx Typical application Figure 7. Voltage regulator with reference Figure 8. Battery backed-up regulated supply 13/29 Typical application Figure 9. 14/29 Post-regulated dual supply LD1117Axx LD1117Axx 7 LD1117A adjustable: application note 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 µA typ. (120 µA max.) and ΔIADJ is 1 µA typ. (5 µA max.). R1 is normally fixed to 120 Ω. From Figure 7 we obtain: VOUT = VREF + R2 (IADJ +IR1) = VREF + R2 (IADJ +VREF /R1) = VREF (1 + R2 / R1) + R2 x IADJ. In normal application R2 value is in the range of few kΩ, so the R2 x IADJ product could not be considered in the VOUT calculation; then the above expression becomes: VOUT = VREF (1 + R2 / R1). In order to have the better load regulation it is important to realize a good Kelvin connection of R1 and R2 resistors. In particular R1 connection must be realized very close to OUT and ADJ pin, while R2 ground connection must be placed as near as possible to the negative Load pin. Ripple rejection can be improved by introducing a 10 µF 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 15/29 Package mechanical data 8 LD1117Axx 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. 16/29 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 17/29 Package mechanical data LD1117Axx TO-220 mechanical data Dim. mm. Min. Typ. inch. Max. Min. Typ. Max. 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 0.70 0.019 0.027 D1 E 1.27 0.49 0.050 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 0.409 L2 16.4 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 18/29 LD1117Axx Package mechanical data Figure 12. Drawing dimension D²PAK/A (type STD-ST) 7106164/E 19/29 Package mechanical data LD1117Axx Figure 13. Drawing dimension D²PAK/A (type WOOSEOK-Subcon.) 7106164/E 20/29 LD1117Axx Table 9. Package mechanical data D²PAK/A mechanical data Dim. Min. Type WOOSEOK-Subcon. mm. mm. Typ. Max. Min. Typ. Max. A 4.40 4.60 4.30 4.70 A1 0.03 0.23 0 0.20 b 0.70 0.93 0.70 0.90 b1 0.80 1.30 b2 1.14 1.70 1.17 1.37 c 0.45 0.60 0.45 0.50 0.60 c2 1.23 1.36 1.25 1.30 1.40 D 8.95 9.35 9 9.20 9.40 D1 7.50 E 10 E1 8.50 e 7.50 10.40 9.80 10.20 7.50 2.54 2.54 e1 4.88 5.28 H 15 15.85 15 J1 2.49 2.69 2.20 2.60 L 2.29 2.79 1.79 2.79 L1 1.27 1.40 1 1.40 R V2 Note: Type STD-ST 5.08 0.4 0° 15.30 15.60 0.30 8° 0° 3° The D²PAK/A package coming from the subcontractor Wooseok is fully compatible with the ST's package suggested footprint. 21/29 Package mechanical data LD1117Axx Figure 14. D²PAK/A footprint recommended data Table 10. Footprint data Values 22/29 Dim. mm. inch. A 12.20 0.480 B 9.75 0.384 C 16.90 0.665 D 3.50 0.138 E 1.60 0.063 F 2.54 0.100 G 5.08 0.200 LD1117Axx Package mechanical data 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 23/29 Package mechanical data LD1117Axx Tape & reel SOT223 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 24/29 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 0.078 LD1117Axx Package mechanical data Tape & reel DPAK-PPAK 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 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 25/29 Package mechanical data LD1117Axx Tape & reel D2PAK-P2PAK-D2PAK/A-P2PAK/A mechanical data mm. inch. Dim. Min. Typ. A Min. Typ. 180 13.0 13.2 Max. 7.086 C 12.8 D 20.2 0.795 N 60 2.362 T 26/29 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 LD1117Axx Order codes 9 Order codes Table 11. Order codes Packages D²PAK/A Output voltage TO-220 SOT-223 DPAK LD1117AS12TR LD1117ADT12TR LD1117AS18TR LD1117ADT18TR LD1117AV18 1.8 V LD1117AS25TR LD1117ADT25TR LD1117AV25 2.5 V LD1117AS33TR LD1117ADT33TR LD1117AV33 3.3 V LD1117ASTR LD1117ADT-TR LD1117AV Adjustable from 1.25 to 15 V 1.2 V LD1117AD2MTR 27/29 Revision history LD1117Axx 10 Revision history Table 12. Document revision history Date Revision 29-Sep-2004 11 Add new part number #12. 12-Oct-2004 12 Mistake VO max. - Table 4. 21-Apr-2005 13 Add new package - D²PAK/A. 05-Jul-2005 14 The DPAK mechanical data updated. 10-Feb-2006 15 Add new package - D²PAK/A (B Type). 20-Dec-2006 16 Change value VIN on Table 2. 19-Jan-2007 17 D2PAK/A mechanical data updated and add footprint data. 28-May-2007 18 Add IADJ and ΔIADJ values on Table 8. 07-Jun-2007 19 Add IO(min) value on Table 8. 15-Apr-2008 20 Modified: Table 11 on page 27. 28/29 Changes 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. 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