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ST LM217M LM317M handbook

1. connected to pin 3 SOT 194 PE11831 P 11B11 LM217M LM217MT LM217MDT LM217MX LM217MS LM317M LM317MT LM317MDT LM317MX LM317MS TEST CIRCUIT SC08501 2 11 i SGS THOMSON II imenozzemonies LM217M LM317M ELECTRICAL CHARACTERISTICS FOR LM217M Refer to the test circuits 40 lt Tj lt 125 C Vi Vo 5 V lo 100 mA Pa lt 7 5W unless otherwise specified Symbol Parameter Test Conditions Line Regulation Vi Vo 3 to 40 V 2G o Load Regulation Vo lt 5V lo 10 mA to 500 mA i Vo gt 5V Tj 25 C lo 10 mA to 500 mA IN lay Adjustment Pin Current lo 10 mA to 500 mA lo 10 mA to 500 mA AVo Output Voltage Temperature Vo Stability lo min Minimum Load Current Vi Vo 40V o max Maximum Output Current Vi Vo lt 15V 500 Vi Vo 40V Pa lt Pamax Tj 25 C EN Output Noise Voltage B 10Hz to 10KHz percentance of Vo T 256 SVR Supply Voltage Rejection Tj 25 C CADJ is connected between Adjust pin and Ground Typ AVo AV mV 1 2 ELECTRICAL CHARACTERISTICS FOR LM317M Refer to the test circuits O lt Tj lt 125 C Vi Vo 5 V lo 100 mA Pa lt 7 5W unless otherwise specified Symbol Parameter Test Conditions Min Typ Max Unit AVG Cine Regulation Vi vo 3tosow T 28 001 004 AN 7 f ose 007 av AV aos amme 1 0 100 ua lo 10 MA to 500 mA lo 10 MA to 500 mA AVo Output Voltage Temperature 0 Ea
2. M TO 252 DPAK MECHANICAL DATA F DETAIL A Y O DETAIL A 0068772 B 8 11 SGS THOMSON II imenozzemonies LM217M LM317M SOT 82 MECHANICAL DATA 9 11 MICROELECTRONICS ky SGS THOMSON LM217WLM317M SOT 194 MECHANICAL DATA LJ po 10 11 SGS THOMSON I imenozLzeTROMIES LM217M LM317M Information furnished is believed to be accurate and reliable However SGS THOMSON Microelectronics assumes no responsability for the consequence of use of such information nor for any infringemert of patents or other rights of third parties which may results from its use No license is granted by implication or otherwise under any patent or patent rights of SGS THOMSON Microelectronics Specifications mentoned in this publication are subject to change without notice This publication supersedes and replaces all information previously supplied SGS THOMSON Microelectronics produds are not authorized for use as critical components in life support devices or systems without express written approval of SGS THOMSON Microelectonics 1997 SGS THOMSON Microelectronics Printed in Italy All Rights Reserved SGS THOMSON Microelectrmics GROUP OF COMPANIES Australia Brazil Canada China France Germany Hong Kong Italy Japan Korea Malaysia Malta Morocco The Netherlands Singapore Spain Sweden Switzerland Taiwan Thailand United Kingdom U S A 11 11 SGS THOMSON V imenozuzerRO
3. MIES
4. O O LM217MJ DO LM217M LM317M Lyg SGS THOMSON Yh MICROELECTRONICS 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 TRANSISTOR SAFE AREA COMPENSATION m FLOATING OPERATION FOR HIGH VOLTAGE APPLICATIONS DESCRIPTION The LM217M LM317M are monolithic integrated circuits in TO 220 DPAK SOT 82 and SOT 194 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 SCHEMATIC DIAGRAM 01 September 1997 5 5D44 TO 252 SOT 194 1 11 LM217MLM317M ABSOLUTE MAXIMUM RATINGS Unit N Operating Junction Temperature Range forLM217M 40 to 125 pe for LM317M 0 to 125 26 Tstg Storage Temperature Range 55 to 150 Re Boot is not guaranteed for T gt 85 C THERMAL DATA TT Rthj case Thermal Resistance Junction case Max 8 3 C W Rihj amb Thermal Resistance Junction ambient Max 100 50 C W PIN CONNECTION AND ORDERING NUMBERS 2 Cc Van 3 Your A PCi 1821 Tab
5. e excessive ringing An output capacitance Co in the form of a 1uF tantalium or 25uF 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 show the LM317M with the recommended protection diodes for output voltages in excess of 25V or high capacitance values Ca gt 25uF C2 gt 10uF Diode D1 prevents C3 from discharging through the IC during an input short circuit The combination of diodes D1 and D2 prevents Co from discarging through the regulator during an input or output short circuit START UP BLOCK Its not guaranteed the Re Boot of the device when the junction temperature is over 85 C 5 11 MSON KSI Riston sommonnes LM217MLM317M Figure 5 Voltage Regulator with Protection Diodes 1N4001 Figure 6 Slow Turn on 15V Regulator Figure 7 Current Regulator 5 5053 1 Vref 1 25V 2 LM317M RI D1 Pho a 3 AnJ R 5 5052N lo R Figure 8 5V Electronic Shut down Regulator Figure 9 Digitally Selected Outputs LM317M T DIGITAL INPUTS 5 5055 1 R2 sets maximum Vo 6 11 i SGS THOMSON II imenozzemonies LM217M LM317M TO 220 MECHANICAL DATA 7 11 KSI incaouscrontes LM217WLM317
6. ee ee ee I Vi Vo 40V 35 t0 mA lo max Maximum Output Current Vi Vo lt 15V 500 Vi Vo 40V Pa lt Pamax Tj 25 C EN Output Noise Voltage B 10Hz to 10KHz percentance of Vo Tj 25 C SVR Tj Supply Voltage Rejection 25 C f 120 Hz Capy 10uF CADI is connected between Adjust pin and Ground 3 11 KSI incaouscmontes LM217MLM317M Figure 1 Current Limit GC6o6560 na L Figure 2 Minimum Operating Current GC25560 la el ese LA ee tada of K ILIN sh V IIIA l N i 0 10 20 30 Vin Va CVD 0 10 20 JU Vm Vn CV Figure 3 Basic Adjustable Regulator 5 5045 1 Figure 4 Thermal Resistance amp Maximum Power Dissipation vs P C B Copper Lenght for DPAK 50115650 Pdmax calculated for Ta 50 C 4 11 SGS THOMSON I mienozuzemonies APPLICATION INFORMATION The LM317M 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 3 giving an output voltage Vo of R Vo VREF 1 lapu Re The device was designed to minimize the term lapu 100uA 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 minimu
7. m load current condition If the load is insufficient the output voltage will rise Since the LM317M is a floating regulator and sees only the input to outputdifferential 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 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 device is situated far from the input filter capacitors in which case an input bypass is needed LM217M LM317M A 0 1uF disc or iuF tantalium 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 10uF capacitor should improve ripple rejection about 80dB at 120Hz an a 10V application Although the LM317M is stable with no output capacitance like any feedback circuit certain values of external capacitance can caus

ST LM217M LM317M handbook

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