LM117/217 LM317 1.2V TO 37V VOLTAGE REGULATOR ■ ■ ■ ■ ■ 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 Parameter Value Unit 40 V Input-output Differential Voltage IO Output Current T op Operating Junction Temperature for: LM117 LM217 LM317 Intenrally Limited P tot Power Dissipation T st g Storage Temperature o -55 to 150 -25 to 150 0 to 125 C C o C o Internally Limited o - 65 to 150 C THERMAL DATA Symbol Parameter R thj- ca se Thermal Resistance Junction-case R thj- amb Thermal Resistance Junction-ambient November 1999 TO-3 Max Max 4 35 TO-220 3 50 ISOWATT220 4 60 D2PAK 3 62.5 Unit o o C/W C/W 1/11 LM117/217/317 CONNECTION DIAGRAM AND ORDERING NUMBERS (top view) TO-220 ISOWATT220 D2PAK Type TO-3 LM117 LM117K LM217 LM217K LM217T LM317 LM317K LM317T SCHEMATIC DIAGRAM 2/11 TO-3 TO-220 ISOWATT220 2 D PAK LM217D2T LM317P LM317D2T 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 Parameter Test Conditions LM117/LM217 Min. ∆V o ∆V o Line Regulation Load Regulation Vi - Vo = 3 to 40 V Vo ≤ 5V Io = 10 mA to IMAX T j = 25 o C o Max. LM317 Min. Unit Typ. Max. 0.01 0.02 0.01 0.04 %/V 0.02 0.05 0.02 0.07 %/V 5 15 5 25 mV 20 50 20 70 mV 0.1 0.3 0.1 0.5 % 0.3 1 0.3 1.5 % Adjustment Pin Current 50 100 50 100 µA ∆I ADJ Adjustment Pin Current Vi - Vo = 2.5 to 40 V Io = 10 mA to IMAX 0.2 5 0.2 5 µA V REF 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 1.25 1.3 1.25 1.3 V Vo ≥ 5V Io = 10 mA to IMAX I ADJ ∆ Vo Vo I o (m in) Minimum Load Current Vi - Vo = 40 V I o (max ) Maximum Load Current T j = 25 C Typ. o T j = 25 C 1.2 1 3.5 Vi - Vo ≤ 15 V PD < PMAX 1.5 Vi - Vo = 40 V PD < PMAX o Tj = 25 C eN SVR Output Noise Voltage (percentance of VO) B = 10Hz to 10KHz Tj = 25 oC Supply Voltage Rejection (*) Tj = 25 oC f = 120 Hz 1.2 C ADJ =0 C ADJ =10µF 66 2.2 1 5 3.5 10 mA 2.2 A 0.4 0.4 A 0.003 0.003 % 65 65 dB 80 dB 80 1.5 % 66 (*) 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 150°C; LM 217 Tj = – 25 to 150°C ; LM 317 Tj = 0 to 125°C. 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 (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 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 0.1µF An adjustment terminal to ground 10µF capacitor LM117/217/317 to improve the ripple rejection of about 15 dB (CADJ). An 1µF tantalium (or 25µFAluminium electrolitic) capacitor on the output to improve transient response. In additional to external capacitors, it is good 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. Figure 5 : Voltage Regulator with Protection Diodes. 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) * RS sets output impedance of charger R2 Zo = RS (1 + ) R1 Use of RS allows low charging rates with fully charged battery. 6/11 Figure 11 : Current Limited 6V Charger * R3 sets peak current (0.6A for 1Ω). ** C1 recommended to filter out input transients. LM117/217/317 TO-3 (R) MECHANICAL DATA mm DIM. MIN. A inch TYP. MAX. MIN. TYP. 11.7 B MAX. 0.460 0.96 1.10 0.037 0.043 C 1.70 0.066 D 8.7 0.342 E 20.0 0.787 G 10.9 0.429 N 16.9 0.665 P 26.2 R 3.88 1.031 4.09 U 0.152 39.50 V 1.555 30.10 1.185 A P D C O N B V E G U 0.161 R P003N 7/11 LM117/217/317 TO-220 MECHANICAL DATA mm DIM. MIN. inch TYP. 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 D1 0.107 1.27 0.050 E 0.49 0.70 0.019 0.027 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 14.0 0.511 L2 16.4 L4 0.645 13.0 0.551 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 D1 C D A E L5 H2 G G1 F1 L2 F2 F Dia. L5 L9 L7 L6 8/11 L4 P011C LM117/217/317 ISOWATT220 MECHANICAL DATA mm DIM. MIN. A 4.4 inch TYP. MAX. MIN. TYP. MAX. 4.6 0.173 0.181 B 2.5 2.7 0.098 0.106 D 2.5 2.75 0.098 0.108 E 0.4 0.7 0.015 0.027 F 0.75 1 0.030 0.039 F1 1.15 1.7 0.045 0.067 F2 1.15 1.7 0.045 0.067 G 4.95 5.2 0.195 0.204 G1 2.4 2.7 0.094 0.106 H 10 10.4 0.393 0.409 L2 16 0.630 28.6 30.6 1.126 1.204 L4 9.8 10.6 0.385 0.417 L6 15.9 16.4 0.626 0.645 L7 9 9.3 0.354 0.366 Ø 3 3.2 0.118 0.126 B D A E L3 L3 L6 F F1 L7 F2 H G G1 ¯ 1 2 3 L2 L4 P011G 9/11 LM117/217/317 TO-263 (D2PAK) MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. MIN. TYP. MAX. A 4.4 4.6 0.173 0.181 A1 2.49 2.69 0.098 0.106 B 0.7 0.93 0.027 0.036 B2 1.14 1.7 0.044 0.067 C 0.45 0.6 0.017 0.023 C2 1.23 1.36 0.048 0.053 D 8.95 9.35 0.352 0.368 E 10 10.4 0.393 0.409 G 4.88 5.28 0.192 0.208 L 15 15.85 0.590 0.624 L2 1.27 1.4 0.050 0.055 L3 1.4 1.75 0.055 0.068 D C2 A2 A C DETAIL”A” DETAIL”A” A1 B2 E B G 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. 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