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| (R) LM117/217 LM317 1.2V TO 37V VOLTAGE REGULATOR s s s s s OUTPUT VOLTAGE RANGE : 1.2 TO 37V OUTPUT CURRENT IN EXCESS OF 1.5A 0.1% LINE AND LOAD REGULATION FLOATING OPERATION FOR HIGH VOLTAGES COMPLETE SERIES OF PROTECTIONS : CURRENT LIMITING, THERMAL SHUTDOWN AND SOA CONTROL DESCRIPTION The LM117/LM217/LM317 are monolithic integrated circuit in TO-220, ISOWATT220, TO-3 and D2PAK packages intended for use as positive adjustable voltage regulators. They are designed to supply more than 1.5A 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. TO-3 D2PAK TO-220 ISOWATT220 ABSOLUTE MAXIMUM RATING Symbol V i-o IO T op Parameter Input-output Differential Voltage Output Current Operating Junction Temperature for: LM117 LM217 LM317 Power Dissipation Storage Temperature Value 40 Intenrally Limited -55 to 150 -25 to 150 0 to 125 Internally Limited - 65 to 150 o o o Unit V C C o C P tot T st g C THERMAL DATA Symbol Parameter Max Max TO-3 4 35 TO-220 3 50 ISOWATT220 4 60 D2PAK 3 62.5 Unit o o R thj- ca se Thermal Resistance Junction-case R thj- amb Thermal Resistance Junction-ambient C/W C/W November 1999 1/11 LM117/217/317 CONNECTION DIAGRAM AND ORDERING NUMBERS (top view) TO-220 ISOWATT220 D2PAK TO-3 Type LM117 LM217 LM317 TO-3 LM117K LM217K LM317K TO-220 LM217T LM317T ISOWATT220 D PAK LM217D2T 2 LM317P LM317D2T SCHEMATIC DIAGRAM 2/11 LM117/217/317 BASIC ADJUSTABLE REGULATOR ELECTRICAL CHARACTERISTICS (Vi - Vo = 5 V, Io = 500 mA, IMAX = 1.5A and PMAX = 20W, unless otherwise specified) Symbol V o V o Parameter Line Regulation Load Regulation Test Conditions Vi - Vo = 3 to 40 V Vo 5V Io = 10 mA to IMAX Vo 5V Io = 10 mA to IMAX I ADJ I ADJ V REF Adjustment Pin Current Adjustment Pin Current Vi - Vo = 2.5 to 40 V Io = 10 mA to IMAX Reference Voltage Vi - Vo = 2.5 to 40 V (between pin 3 and pin Io = 10 mA to IMAX 1) PD PMAX Output Voltage Temperature Stability Minimum Load Current Vi - Vo = 40 V Maximum Load Current Vi - Vo 15 V PD < PMAX Vi - Vo = 40 V PD < PMAX o Tj = 25 C eN SVR Output Noise Voltage (percentance of VO) Supply Voltage Rejection (*) B = 10Hz to 10KHz Tj = 25 oC Tj = 25 oC f = 120 Hz C ADJ =0 C ADJ =10F 66 1.5 1.2 T j = 25 o C T j = 25 C T j = 25 C o o LM117/LM217 Min. Typ. 0.01 0.02 5 20 0.1 0.3 50 0.2 1.25 Max. 0.02 0.05 15 50 0.3 1 100 5 1.3 1.2 Min. LM317 Typ. 0.01 0.02 5 20 0.1 0.3 50 0.2 1.25 Max. 0.04 0.07 25 70 0.5 1.5 100 5 1.3 Unit %/V %/V mV mV % % A A V Vo Vo I o (m in) I o (max ) 1 3.5 2.2 0.4 5 1.5 1 3.5 2.2 0.4 10 % mA A A 0.003 65 80 66 0.003 65 80 % dB dB (*) CADJ is connected between pin 1 and ground. Note: (1) Unless otherwise specified the above specs, apply over the following conditions : LM 117 Tj = - 55 to 150C; LM 217 Tj = - 25 to 150C ; LM 317 Tj = 0 to 125C. 3/11 LM117/217/317 Figure 1 : Output Current vs. Input-output Differential Voltage. Figure 2 : Dropout Voltage vs. Junction Temperature. Figure 3 : Reference Voltage vs. Junction Figure 4 : Basic Adjustable Regulator. APPLICATION INFORMATION The LM117/217/317 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: R2 VO = VREF (1 + ) + IADJ R2 R1 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 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 LM117/217317 is a floating regulator and "sees" only the input-to-output differential 4/11 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 optimise 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. Performance may be improved with added capacitance as follow: An input bypass capacitor of 0.1F An adjustment terminal to ground 10F capacitor LM117/217/317 to improve the ripple rejection of about 15 dB (CADJ). An 1F tantalium (or 25FAluminium electrolitic) capacitor on the output to improve transient response. In additional to external capacitors, it is good Figure 5 : Voltage Regulator with Protection Diodes. practice to add protection diodes, as shown in fig.5. D1 protect the device against input short circuit, while D2 protect against output short circuit for capacitance discharging. D1 protect the device against input short circuit, while D2 protects against output short circuit for capacitors discharging Figure 6 : Slow Turn-on 15V Regulator. Figure 7 : Current Regulator. Io = Vr ef R1 + IADJ 1.25V R1 5/11 LM117/217/317 Figure 8 : 5V Electronic Shut-down Regulator Figure 9 : Digitally Selected Outputs (R2 sets maximum Vo) Figure 10 : Battery Charger (12V) Figure 11 : Current Limited 6V Charger * RS sets output impedance of charger R2 Zo = RS (1 + ) R1 Use of RS allows low charging rates with fully charged battery. * R3 sets peak current (0.6A for 1). ** C1 recommended to filter out input transients. 6/11 LM117/217/317 TO-3 (R) MECHANICAL DATA mm MIN. A B C D E G N P R U V 30.10 3.88 10.9 16.9 26.2 4.09 39.50 1.185 0.152 0.96 TYP. 11.7 1.10 1.70 8.7 20.0 0.429 0.665 1.031 0.161 1.555 0.037 MAX. MIN. inch TYP. 0.460 0.043 0.066 0.342 0.787 MAX. DIM. P G A D C U V O N R B P003N 7/11 E LM117/217/317 TO-220 MECHANICAL DATA DIM. MIN. A C D D1 E F F1 F2 G G1 H2 L2 L4 L5 L6 L7 L9 DIA. 13.0 2.65 15.25 6.2 3.5 3.75 0.49 0.61 1.14 1.14 4.95 2.4 10.0 16.4 14.0 2.95 15.75 6.6 3.93 3.85 0.511 0.104 0.600 0.244 0.137 0.147 E mm TYP. MAX. 4.60 1.32 2.72 1.27 0.70 0.88 1.70 1.70 5.15 2.7 10.40 0.019 0.024 0.044 0.044 0.194 0.094 0.393 MIN. 0.173 0.048 0.094 4.40 1.23 2.40 inch TYP. MAX. 0.181 0.051 0.107 0.050 0.027 0.034 0.067 0.067 0.203 0.106 0.409 0.645 0.551 0.116 0.620 0.260 0.154 0.151 A C D1 L2 F1 D G1 Dia. F2 F L5 L7 L6 L9 L4 G 8/11 H2 P011C LM117/217/317 ISOWATT220 MECHANICAL DATA DIM. MIN. A B D E F F1 F2 G G1 H L2 L3 L4 L6 L7 O 28.6 9.8 15.9 9 3 4.4 2.5 2.5 0.4 0.75 1.15 1.15 4.95 2.4 10 16 30.6 10.6 16.4 9.3 3.2 1.126 0.385 0.626 0.354 0.118 mm TYP. MAX. 4.6 2.7 2.75 0.7 1 1.7 1.7 5.2 2.7 10.4 MIN. 0.173 0.098 0.098 0.015 0.030 0.045 0.045 0.195 0.094 0.393 0.630 1.204 0.417 0.645 0.366 0.126 inch TYP. MAX. 0.181 0.106 0.108 0.027 0.039 0.067 0.067 0.204 0.106 0.409 A B L3 L6 L7 F1 F D G1 E H F2 123 L2 L4 P011G G 9/11 LM117/217/317 TO-263 (D2PAK) MECHANICAL DATA mm MIN. A A1 B B2 C C2 D E G L L2 L3 4.4 2.49 0.7 1.14 0.45 1.23 8.95 10 4.88 15 1.27 1.4 TYP. MAX. 4.6 2.69 0.93 1.7 0.6 1.36 9.35 10.4 5.28 15.85 1.4 1.75 MIN. 0.173 0.098 0.027 0.044 0.017 0.048 0.352 0.393 0.192 0.590 0.050 0.055 inch TYP. MAX. 0.181 0.106 0.036 0.067 0.023 0.053 0.368 0.409 0.208 0.624 0.055 0.068 DIM. D A C A2 DETAIL"A" A1 B2 B G C2 DETAIL"A" E L2 L L3 P011P6/F 10/11 LM117/217/317 Information furnished is believed to be accurate and reliable. However, STMicroelectronic s 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. Specification 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 withoutexpress written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 1999 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com . 11/11 |
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