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| LM217L LM317L LOW CURRENT 1.2 TO 37V ADJUSTABLE VOLTAGE REGULATOR I I I I I I I I 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 TRANSISTOR SAFE AREA COMPENSATION FLOATING OPERATION FOR HIGH VOLTAGE APPLICATIONS TO-92 SO-8 DESCRIPTION The LM217L/LM317L are monolithic integrated circuit in SO-8 and TO-92 packages intended for use as positive adjustable voltage regulators. They are designed to supply until 100 mA of load current with an output voltage adjustable over a 1.2 to 37V range. 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 Figure 1: Schematic Diagram December 2005 Rev. 3 1/13 LM217L/LM317L Table 1: Absolute Maximum Ratings Symbol VI - VO Pd Topr Tstg Power Dissipation Operating Junction Temperature for LM217L Range for LM317L Storage Temperature Range Parameter Input-Output Differential Voltage Value 40 Internally Limited -40 to 125 0 to 125 -55 to 150 C C Unit V Figure 2: Pin Connection (top view) PIN 1 = ADJUST PIN 2 = IN PIN 3 = OUT BOTTOM VIEW SO-8 TO-92 Table 2: Order Codes TYPE LM217L LM317L SO-8 (TUBE) (*) LM217LD LM317LD TO-92 (BAG) (#) LM217LZ LM317LZ (*) Available in Tape & Reel with the suffix "-TR". (#) 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. Figure 3: Test Circuit 2/13 LM217L/LM317L Table 3: Electrical Characteristics Of LM217L (refer to the test circuits, TJ = - 40 to 125C, VI - VO = 5 V, IO = 40 mA, unless otherwise specified). Symbol VO VO Parameter Line Regulation Load Regulation Test Conditions VI - VO = 3 to 40 V IL < 20 mA VO 5 V IO = 5 to 100 mA VO 5 V IO = 5 to 100 mA IADJ IADJ VREF Adjustment Pin Current Adjustment Pin Current Reference Voltage VI - VO = 3 to 40 V Pd < 625 mW VI - VO = 3 to 40 V Pd < 625 mW IO = 5 to 100 mA IO = 10 to 500 mA 1.2 TJ = 25C TJ = 25C TJ = 25C Min. Typ. 0.01 0.02 5 20 0.1 0.3 50 0.2 1.25 0.7 VI - VO = 40 V VI - VO = 3 to 13 V VI - VO = 40 V eN SVR Output Noise Voltage B = 10 Hz to 10 KHzTJ = 25C CADJ = 0 CADJ = 10 F 66 Supply Voltage Rejection (*) TJ = 25C f = 120 Hz 100 3.5 200 50 0.003 65 80 % dB 5 Max. 0.02 0.05 15 50 0.3 1 100 5 1.3 Unit %/V mV % A A V % mA mA VO/VO Output Voltage Temperature Stability IO(min) Minimum Load Current IO(max) Maximum Output Current (*) CADJ is connected between Adjust pin and Ground. 3/13 LM217L/LM317L Table 4: Electrical Characteristics Of LM317L (refer to the test circuits, TJ = 0 to 125C, VI - VO = 5 V, IO = 40 mA, unless otherwise specified). Symbol VO VO Parameter Line Regulation Load Regulation Test Conditions VI - VO = 3 to 40 V IL < 20 mA VO 5 V IO = 5 to 100 mA VO 5 V IO = 5 to 100 mA IADJ IADJ VREF Adjustment Pin Current Adjustment Pin Current Reference Voltage VI - VO = 3 to 40 V Pd < 625 mW VI - VO = 3 to 40 V Pd < 625 mW IO = 5 to 100 mA IO = 5 to 100 mA 1.2 TJ = 25C TJ = 25C TJ = 25C Min. Typ. 0.01 0.02 5 20 0.1 0.3 50 0.2 1.25 0.7 VI - VO = 40 V VI - VO = 3 to 13 V VI - VO = 40 V eN SVR Output Noise Voltage B = 10 Hz to 10 KHzTJ = 25C CADJ = 0 CADJ = 10 F 66 Supply Voltage Rejection (*) TJ = 25C f = 120 Hz 100 3.5 200 50 0.003 65 80 % dB 5 Max. 0.04 0.07 25 70 0.5 1.5 100 5 1.3 Unit %/V mV % A A V % mA mA VO/VO Output Voltage Temperature Stability IO(min) Minimum Load Current IO(max) Maximum Output Current (*) CADJ is connected between Adjust pin and Ground. Figure 4: Current Limit Figure 5: Minimum Operating Current 4/13 LM217L/LM317L 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 fig. 4), giving an output voltage VO of: VO = VREF (1 + R2/R1) + IADJ R2 The device was designed to minimize the term IADJ (100A max) and to maintain it very constant with line and load changes. Usually, the error term IADJ x 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. Figure 6: Basic Adjustable Regulator 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 fig. 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. Figure 7: Voltage Regulator with Protection Diodes 5/13 LM217L/LM317L Figure 8: Slow Turn-on 15V Regulator Figure 9: Current Regulator Vref 1.25V IO = + IADJ R1 R1 Figure 10: 5V Electronic Shut-down Regulator 6/13 LM217L/LM317L Figure 11: Digitally Selected Outputs (R2 = sets maximum VO) 7/13 LM217L/LM317L SO-8 MECHANICAL DATA DIM. A A1 A2 B C D E e H h L k ddd 0.1 5.80 0.25 0.40 mm. MIN. 1.35 0.10 1.10 0.33 0.19 4.80 3.80 1.27 6.20 0.50 1.27 0.228 0.010 0.016 TYP MAX. 1.75 0.25 1.65 0.51 0.25 5.00 4.00 MIN. 0.053 0.04 0.043 0.013 0.007 0.189 0.150 0.050 0.244 0.020 0.050 inch TYP. MAX. 0.069 0.010 0.065 0.020 0.010 0.197 0.157 8 (max.) 0.04 0016023/C 8/13 LM217L/LM317L TO-92 MECHANICAL DATA mm. DIM. MIN. A b D E e e1 L R S1 W 4.32 0.36 4.45 3.30 2.41 1.14 12.7 2.16 0.92 0.41 5 TYP MAX. 4.95 0.51 4.95 3.94 2.67 1.40 15.49 2.41 1.52 0.56 MIN. 170.1 14.2 175.2 129.9 94.9 44.9 500.0 85.0 36.2 16.1 5 TYP. MAX. 194.9 20.1 194.9 155.1 105.1 55.1 609.8 94.9 59.8 22.0 mils 0102782/D 9/13 LM217L/LM317L Tape & Reel SO-8 MECHANICAL DATA mm. DIM. MIN. A C D N T Ao Bo Ko Po P 8.1 5.5 2.1 3.9 7.9 12.8 20.2 60 22.4 8.5 5.9 2.3 4.1 8.1 0.319 0.216 0.082 0.153 0.311 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.335 0.232 0.090 0.161 0.319 MIN. TYP. MAX. 12.992 0.519 inch 10/13 LM217L/LM317L Tape & Reel for TO-92 MECHANICAL DATA DIM. A1 T T1 T2 d P0 P2 F1, F2 delta H W W0 W1 W2 H H0 H1 D0 t L1 delta P u 1 2 mm. MIN. TYP 4.80 3.80 1.60 2.30 0.48 12.5 5.65 2.44 17.5 5.7 8.5 12.9 7.05 2.94 19.0 6.3 9.25 18.70 16.50 4.2 0.90 3 1 50 360 30 delta P A1 H1 H H0 L l1 W0 W W1 d W2 delta H T2 inch MAX. MIN. TYP. 0.189 0.150 0.063 0.091 0.019 0.492 0.222 0.096 0.689 0.224 0.335 0.508 0.278 0.116 0.748 0.248 0.364 0.726 0.650 0.165 0.035 0.118 0.039 1.968 14.173 1.181 T T1 MAX. 2.54 2 18.00 0.100 0.079 0.709 0.50 18.50 15.50 25.00 3.8 0.20 0.728 0.610 0.984 0.150 1 2 u F1 F2 P2 P0 D0 t Pull-out direction DRAWING NOT IN SCALE 11/13 LM217L/LM317L Table 5: Revision History Date 16-Mar-2005 23-Dec-2005 Revision 2 3 Description of Changes Add Tape & Reel for TO-92. Mistake on Ordering Table in Header. 12/13 LM217L/LM317L Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners (c) 2005 STMicroelectronics - All Rights Reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 13/13 |
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