LM217L LM317L Low current 1.2 to 37V adjustable voltage regulator Features ■ Output voltage range: 1.2 to 37V ■ Output current in excess of 100 mA ■ Line regulation typ. 0.01% ■ Load regulation typ. 0.1% ■ Thermal overload protection ■ Short circuit protection ■ Output transition safe area compensation ■ Floating operation for high voltage applications TO-92 Description The LM217L/LM317L are monolithic integrated circuit in SO-8 and TO-92 packages intended for use as positive adjustable voltage regulators. SO-8 The nominal output voltage is selected by means of only a resistive divider, making the device exceptionally easy to use and eliminating the stocking of many fixed regulators. They are designed to supply until 100 mA of load current with an output voltage adjustable over a 1.2 to 37V range. Order codes Packages Part numbers SO-8 (Tape & reel) TO-92 (BAG) (1) LM217L LM217LD13TR LM217LZ LM317L LM317LD13TR LM317LZ 1. Available in tape & reel with the suffix "-TR" and in Ammopak with the suffix "-AP". Please note that in these cases pins are shaped according to tape & reel specifications May 2007 Rev. 4 1/18 www.st.com 18 LM217L/LM317L Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7 Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2/18 LM217L/LM317L 1 Diagram Figure 1. Schematic diagram Diagram 3/18 Pin configuration LM217L/LM317L 2 Pin configuration Figure 2. Pin connections (top view for SO-8, bottom view for TO-92) PIN 1 = ADJUST PIN 2 = IN PIN 3 = OUT SO-8 4/18 TO-92 LM217L/LM317L Maximum ratings 3 Maximum ratings Table 1. Absolute maximum ratings Symbol VI-VO Parameter Input-output differential voltage PD Power dissipation TOP Operating junction temperature range TSTG Storage temperature range Figure 3. Value Unit 40 V Internally Limited mW for LM217L -40 to 125 for LM317L 0 to 125 °C -55 to 150 °C Test circuit 5/18 Electrical characteristics LM217L/LM317L 4 Electrical characteristics Table 2. Electrical characteristics of LM217L (refer to the test circuits, TJ = - 40 to 125°C, VI - VO = 5 V, IO = 40 mA, unless otherwise specified) Symbol ΔVO ΔVO Parameter Line regulation Test conditions VI - VO = 3 to 40 V IL < 20 mA TJ = 25°C VO ≤5 V IO = 5 to 100 mA TJ = 25°C VO ≥ 5 V IO = 5 to 100 mA TJ = 25°C Adjustment pin current ΔIADJ Adjustment pin current VI - VO = 3 to 40 V, IO = 5 to 100 mA Pd < 625 mW VREF Reference voltage VI - VO = 3 to 40 V, IO = 10 to 500 mA Pd < 625 mW Minimum load current IO(max) Maximum output current SVR 0.01 0.02 0.02 0.05 5 15 20 50 Unit 0.1 0.3 0.3 1 50 100 µA 0.2 5 µA 1.25 1.3 V mV % 1.2 0.7 VI - VO = 40 V 3.5 VI - VO = 3 to 13 V 100 % 5 mA 200 mA VI - VO = 40 V 50 Output noise voltage B = 10 Hz to 10 KHz, TJ = 25°C Supply voltage rejection (1) TJ = 25°C f = 120 Hz 1. CADJ is connected between adjust pin and ground. 6/18 Max. %/V Output voltage temperature stability IO(min) eN Typ. Load regulation IADJ ΔVO/VO Min. 0.003 CADJ = 0 CADJ = 10 µF % 65 dB 66 80 LM217L/LM317L Table 3. Symbol ΔVO ΔVO Electrical characteristics Electrical characteristics of LM317L (refer to the test circuits, TJ = 0 to 125°C, VI - VO = 5 V, IO = 40 mA, unless otherwise specified) Parameter Line regulation Test conditions VI - VO = 3 to 40 V IL < 20 mA TJ = 25°C VO ≤5 V IO = 5 to 100 mA TJ = 25°C VO ≥ 5 V IO = 5 to 100 mA TJ = 25°C Adjustment pin current ΔIADJ Adjustment pin current VI - VO = 3 to 40 V, IO = 5 to 100 mA Pd < 625 mW VREF Reference voltage VI - VO = 3 to 40 V, IO = 5 to 100 mA Pd < 625 mW Minimum load current IO(max) Maximum output current SVR Max. Unit 0.01 0.04 0.02 0.07 5 25 20 70 0.1 0.5 0.3 1.5 50 100 µA 0.2 5 µA 1.25 1.3 V %/V mV % 1.2 Output voltage temperature stability IO(min) eN Typ. Load regulation IADJ ΔVO/VO Min. 0.7 VI - VO = 40 V 3.5 VI - VO = 3 to 13 V 100 % 5 mA 200 mA VI - VO = 40 V 50 Output noise voltage B = 10 Hz to 10 KHz, TJ = 25°C Supply voltage rejection (1) TJ = 25°C f = 120 Hz 0.003 CADJ = 0 CADJ = 10 µF % 65 dB 66 80 1. CADJ is connected between adjust pin and ground. 7/18 Typical performance 5 Typical performance Figure 4. Current limit 8/18 LM217L/LM317L Figure 5. Minimum operating current LM217L/LM317L 6 Application information Application information The LM317L provides an internal reference voltage of 1.25V between the output and adjustments terminals. This is used to set a constant current flow across an external resistor divider (see Figure 4.), giving an output voltage VO of: VO = VREF (1 + R2/R1) + IADJ R2 The device was designed to minimize the term IADJ (100µA max) and to maintain it very constant with line and load changes. Usually, the error term IADJ × R2 can be neglected. To obtain the previous requirement, all the regulator quiescent current is returned to the output terminal, imposing a minimum load current condition. If the load is insufficient, the output voltage will rise. Since the LM317L is a floating regulator and "sees" only the input-to-output differential voltage, supplies of very high voltage with respect to ground can be regulated as long as the maximum input-to-output differential is not exceeded. Furthermore, programmable regulator are easily obtainable and, by connecting a fixed resistor between the adjustment and output, the device can be used as a precision current regulator. In order to optimize the load regulation, the current set resistor R1 (see Figure 4.) should be tied as close as possible to the regulator, while the ground terminal of R2 should be near the ground of the load to provide remote ground sensing. 9/18 Application circuits 7 Application circuits Figure 6. Basic adjustable regulator Figure 7. Voltage regulator with protection diodes Figure 8. Slow Turn-on 15V Regulator 10/18 LM217L/LM317L LM217L/LM317L Figure 9. Application circuits Current regulator IO=VREF/R1 + IADJ = 1.25V/R1 Figure 10. 5V Electronic shut-down regulator Figure 11. Digitally selected outputs (R2 = sets maximum VO) 11/18 Package mechanical data 8 LM217L/LM317L 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. 12/18 LM217L/LM317L Package mechanical data SO-8 MECHANICAL DATA DIM. mm. MIN. TYP inch MAX. MIN. TYP. MAX. A 1.35 1.75 0.053 0.069 A1 0.10 0.25 0.04 0.010 A2 1.10 1.65 0.043 0.065 B 0.33 0.51 0.013 0.020 C 0.19 0.25 0.007 0.010 D 4.80 5.00 0.189 0.197 E 3.80 4.00 0.150 0.157 e 1.27 0.050 H 5.80 6.20 0.228 0.244 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 k ddd 8˚ (max.) 0.1 0.04 0016023/C 13/18 Package mechanical data LM217L/LM317L TO-92 MECHANICAL DATA mm. mils DIM. MIN. TYP MAX. MIN. TYP. MAX. A 4.32 4.95 170.1 194.9 b 0.36 0.51 14.2 20.1 D 4.45 4.95 175.2 194.9 E 3.30 3.94 129.9 155.1 e 2.41 2.67 94.9 105.1 e1 1.14 1.40 44.9 55.1 L 12.7 15.49 500.0 609.8 R 2.16 2.41 85.0 94.9 S1 0.92 1.52 36.2 59.8 W 0.41 0.56 16.1 22.0 α 5° 5° 0102782/D 14/18 LM217L/LM317L Package mechanical data Tape & Reel SO-8 MECHANICAL DATA mm. inch DIM. MIN. A TYP MAX. MIN. 330 MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 TYP. 0.504 22.4 0.519 0.882 Ao 8.1 8.5 0.319 0.335 Bo 5.5 5.9 0.216 0.232 Ko 2.1 2.3 0.082 0.090 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319 15/18 Package mechanical data LM217L/LM317L Tape & Reel for TO-92 MECHANICAL DATA mm. DIM. MIN. A1 T T1 T2 d P0 P2 F1, F2 delta H W W0 W1 W2 H H0 H1 D0 t L1 delta P u Φ1 Φ2 inch TYP MAX. MIN. 4.80 3.80 1.60 2.30 0.48 12.5 5.65 2.44 17.5 5.7 8.5 TYP. MAX. 0.189 0.150 0.063 0.091 0.019 2.54 ±2 18.00 0.50 18.50 15.50 12.9 7.05 2.94 0.492 0.222 0.096 19.0 6.3 9.25 0.689 0.224 0.335 0.508 0.278 0.116 0.100 0.079 0.709 0.748 0.248 0.364 0.20 0.728 18.70 16.50 0.610 4.2 0.150 25.00 0.726 0.650 0.984 3.8 0.90 3 ±1 50 360 30 0.165 0.035 0.118 0.039 1.968 14.173 1.181 delta P T A1 T2 H1 T1 delta H H H0 d L W2 l1 W0 W W1 Φ1 F1 F2 D0 P2 Φ2 P0 u Pull-out direction DRAWING NOT IN SCALE 16/18 t LM217L/LM317L Revision history 9 Revision history Table 4. Revision history Date Revision Changes 16-Mar-2005 2 Add Tape & reel for TO-92. 23-Dec-2005 3 Mistake on ordering table in header. 18-May-2007 4 Order codes has been updated and the document has been reformatted. 17/18 LM217L/LM317L 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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