LM217M LM317M MEDIUM CURRENT 1.2 TO 37V ADJUSTABLE VOLTAGE REGULATOR OUTPUT VOLTAGE RANGE: 1.2 TO 37V OUTPUT CURRENT IN EXCESS OF 500 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 DESCRIPTION The LM217M/LM317M are monolithic integrated circuits in TO-220 and DPAK packages intended for use as positive adjustable voltage regulators. They are designed to supply until 500 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. TO-220 DPAK SCHEMATIC DIAGRAM January 2004 1/11 LM217M/LM317M ABSOLUTE MAXIMUM RATINGS Symbol VI - VO Pd Topr Tstg Parameter Input-Output Differential Voltage Power Dissipation Value Unit 40 V Internally Limited Operating Junction Temperature for LM217M Range (*) for LM317M Storage Temperature Range -40 to 125 0 to 125 C -55 to 150 C (*) Re-Boot is not guaranteed for TJ 85C. THERMAL DATA SOT-82 SOT-194 DPAK Symbol Parameter Rthj-case Thermal Resistance Junction-case Max Rthj-amb Thermal Resistance Junction-ambient Max TO-220 Unit 8 3 C/W 100 50 C/W CONNECTION DIAGRAM (top view) TO-220 DPAK ORDERING CODES TYPE TO-220 DPAK (*) LM217M LM317M LM217MT LM317MT LM217MDT LM317MDT (*) Available in Tape & Reel with the suffix "-TR". TEST CIRCUIT 2/11 LM217M/LM317M ELECTRICAL CHARACTERISTICS OF LM217M (refer to the test circuits, TJ = - 40 to 125C, VI - VO = 5 V, IO = 100 mA, Pd 7.5 W, unless otherwise specified). Symbol VO VO Parameter Line Regulation Load Regulation IADJ Adjustment Pin Current IADJ Adjustment Pin Current VREF Reference Voltage VO/VO Output Voltage Temperature Stability IO(min) Minimum Load Current IO(max) eN SVR Maximum Output Current Output Noise Voltage (percentage of VO) Test Conditions Typ. Max. Unit TJ = 25C 0.01 0.02 %/V VO 5 V IO = 10 to 500mA TJ = 25C 0.02 5 0.05 15 mV VO 5 V IO = 10 to 500mA TJ = 25C 20 0.1 50 0.3 %/VO 0.3 50 1 100 A 0.2 5 A 1.25 1.3 VI - VO = 3 to 40 V VI - VO = 3 to 40 V IO = 10 to 500 mA VI - VO = 3 to 40 V IO = 10 to 500 mA Min. 1.2 0.7 VI - VO = 40 V VI - VO 15 V 3.5 500 VI - VO = 40 V, Pd < PdMAX, TJ = 25C B = 10 Hz to 100 KHz TJ = 25C Supply Voltage Rejection (*) TJ = 25C f = 120 Hz 5 1000 mA mA 200 CADJ = 0 CADJ = 10 F V % 66 0.003 % 65 dB 80 (*) CADJ is connected between Adjust pin and Ground. ELECTRICAL CHARACTERISTICS OF LM317M (refer to the test circuits, TJ = 0 to 125C, VI - VO = 5 V, IO = 100 mA, Pd 7.5 W, unless otherwise specified). Symbol VO VO Parameter Line Regulation Load Regulation IADJ Adjustment Pin Current IADJ Adjustment Pin Current VREF Reference Voltage VO/VO Output Voltage Temperature Stability IO(min) Minimum Load Current IO(max) eN SVR Maximun Output Current Output Noise Voltage (percentage of VO) Test Conditions Typ. Max. Unit TJ = 25C 0.01 0.04 %/V VO 5 V IO = 10 to 500mA TJ = 25C 0.02 5 0.07 25 mV VO 5 V IO = 10 to 500mA TJ = 25C 20 0.1 70 0.5 %/VO 0.3 50 1.5 100 A 0.2 5 A 1.25 1.3 VI - VO = 3 to 40 V VI - VO = 3 to 40 V IO = 10 to 500 mA VI - VO = 3 to 40 V IO = 10 to 500 mA Min. 1.2 0.7 VI - VO = 40 V 3.5 VI - VO 15 V VI - VO = 40 V, Pd < PdMAX, TJ = 25C B = 10 Hz to 100 KHz TJ = 25C Supply Voltage Rejection (*) TJ = 25C f = 120 Hz 500 10 mA mA 200 CADJ = 0 CADJ = 10 F 1000 V % 66 0.003 % 65 dB 80 (*) CADJ is connected between Adjust pin and Ground. 3/11 LM217M/LM317M Figure 1 : Current Limit Figure 2 : Minimum Operating Current Figure 3 : Basic Adjustable Regulator Figure 4 : Thermal Resistance & Maximum Power Dissipation vs P.C.B. Copper Length for DPAK Pdmax calculated for T a = 50C. 4/11 LM217M/LM317M APPLICATION INFORMATION The LM217M/LM317M provide an internal reference voltage of 1.25V between the output and adjustment terminals. These devices are used to set a constant current flow across an external resistor divider (see fig. 3), giving an output voltage VO of: VO = VREF (1 + R2 / R1) + IADJ R 2 The devices were designed to minimize the term IADJ (100A max) and to maintain it very constant in line and load changes. Usually, the error term IADJxR2 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 LM217M/LM317M devices are floating regulators and "see" 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 regulators are easily obtained and, by connecting a fixed resistor between the adjustment and output, the devices can be used as a precision current regulator. In order to optimize the load regulation, the current set resistor R1 (see fig. 3) 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. EXTERNAL CAPACITORS (Fig.5) Normally no capacitors are needed unless the devices are situated far from the input filter capacitors; in which case an input bypass is needed. A 0.1F disc or 1F tantalum input bypass capacitor (CI) is recommended to reduce the sensitivity to input line impedance. The adjustment terminal may be bypassed to ground to improve ripple rejection. This capacitor (Cadj) prevents ripple from being amplified as the output voltage is increased. A 10F capacitor should improve ripple rejection of about 80dB at 120Hz in a 10V application. Although the LM217M/LM317M devices are stable with no output capacitance like any feedback circuit, certain values of external capacitance can cause excessive ringing. An output capacitance (CO) in the form of a 1F tantalum or 25F aluminium electrolytic capacitor on the output swamps this effect and insures stability. PROTECTION DIODES (Fig.5) When external capacitors are used with any IC regulator it is sometimes necessary to add protection diodes to prevent the capacitors from discharging through low current points into the regulator. Figure 5 shows the LM217M/LM317M with the recommended protection diodes for output voltages in excess of 25V or high capacitance values (C3 > 25F, C2 > 10F). Diode D1 prevents C3 from discharging through the IC during an input short-circuit. The combination of diodes D1 and D2 prevents C2 from discharging through the regulator during an input or output short-circuit. START-UP BLOCK It's not guaranteed the Re-Boot of the device when the junction temperature is over 85C. 5/11 LM217M/LM317M Figure 5 : Voltage Regulator with Protection Diodes Figure 6 : Slow Turn-on 15V Regulator Figure 7 : Current Regulator Vref 1.25V IO = + IADJ R1 R1 6/11 LM217M/LM317M Figure 8 : 5V Electronic Shut-down Regulator Figure 9 : Digitally Selected Outputs (R2 = sets maximum VO) 7/11 LM217M/LM317M TO-220 MECHANICAL DATA DIM. mm. MIN. MAX. MIN. 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 D1 TYP inch 1.27 TYP. MAX. 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 L2 16.4 0.409 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 8/11 LM217M/LM317M DPAK MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 2.2 2.4 0.086 A1 0.9 1.1 0.035 0.094 0.043 A2 0.03 0.23 0.001 0.009 B 0.64 0.9 0.025 0.035 B2 5.2 5.4 0.204 0.212 C 0.45 0.6 0.017 0.023 C2 0.48 0.6 0.019 0.023 D 6 6.2 0.236 D1 E 5.1 6.4 0.244 0.200 6.6 0.252 0.260 E1 4.7 0.185 e 2.28 0.090 e1 4.4 4.6 0.173 0.181 H 9.35 10.1 0.368 0.397 L (L1) L2 L4 1 0.039 2.8 0.110 0.8 0.6 0.031 1 0.023 0.039 0068772-F 9/11 LM217M/LM317M Tape & Reel DPAK-PPAK 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 10/11 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 LM217M/LM317M 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. 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