National Semiconductor LM117/LM317A/LM317 handbook
Contents
1. 2004 National Semiconductor Corporation National Semiconductor LM117 LM317A LM317 July 2004 3 Terminal Adjustable Regulator General Description The LM117 series of adjustable 3 terminal positive voltage regulators is capable of supplying in excess of 1 5A over a 1 2V to 37V output range They are exceptionally easy to use and require only two external resistors to set the output voltage Further both line and load regulation are better than standard fixed regulators Also the LM117 is packaged in standard transistor packages which are easily mounted and handled In addition to higher performance than fixed regulators the LM117 series offers full overload protection available only in IC s Included on the chip are current limit thermal overload protection and safe area protection All overload protection circuitry remains fully functional even if the adjustment ter minal is disconnected Normally no capacitors are needed unless the device is situated more than 6 inches from the input filter capacitors in which case an input bypass is needed An optional output Capacitor can be added to improve transient response The adjustment terminal can be bypassed to achieve very high ripple rejection ratios which are difficult to achieve with stan dard 3 terminal regulators Besides replacing fixed regulators the LM117 is useful in a wide variety of other applications Since the regulator is floating and sees only the inpu2. C W Note 1 Absolute Maximum Ratings indicate limits beyond which damage to the device may occur Operating Ratings indicate conditions for which the device is intended to be functional but do not guarantee specific performance limits For guaranteed specifications and test conditions see the Electrical Characteristics The guaranteed specifications apply only for the test conditions listed Note 2 Refer to RETS117H drawing for the LM117H or the RETS117K for the LM117K military specifications Note 3 Although power dissipation is internally limited these specifications are applicable for maximum power dissipations of 2W for the TO 39 and SOT 223 and 20W for the TO 3 TO 220 and TO 263 Imax is 1 5A for the 3 TO 220 and TO 263 packages 0 5A for the TO 39 package and 1A for the SOT 223 Package All limits i e the numbers in the Min and Max columns are guaranteed to National s AOQL Average Outgoing Quality Level Note 4 Regulation is measured at a constant junction temperature using pulse testing with a low duty cycle Changes in output voltage due to heating effects are covered under the specifications for thermal regulation Note 5 Human body model 100 pF discharged through a 1 5 kQ resistor Note 6 If the TO 263 or TO 252 packages are used the thermal resistance can be reduced by increasing the PC board copper area thermally connected to the package Using 0 5 square inches of copper area 0j4 is 50 C W with 1 square in
3. 0 279 R TYP 0 022 0 028 0 559 0 711 0 077 0 093 A 1 959 2 362 TYP 0 045 0 055 4 1 143 1 397 TYP 0 067 0 083 M lt 0 045 0 055 1 702 2 108 1 143 1 397 Top View Side View 45 x 0 040 0 010 1 016 0 254 3 PLCS Bottom View 0 015 0 003 0 381 0 076 MIN TYP 04022 0 559 A EDS MAX TYP 0 152 MIN TYP Detail A E20A REV 0 Ceramic Leadless Chip Carrier NS Package Number E20A 350 1 esae ET 0 05 us 3X 0 74 0 01 LC o 1 c 9 0 1 c AS 86 www national com 0 18 1 5 6 3 T 3X L 2 3 LAND PATTERN RECOMMENDATION 0 15 0 05 TYP 0 15 0 05 SEATING PLANE 0 03 0 10 TYP 0 9 MIN TYP DIMENSIONS ARE IN MILLIMETERS MP04A Rev B 4 Lead SOT 223 NS Package Number MP04A 24 Physical Dimensions inches millimeters unless otherwise noted Continued 5 1 11 1 7 4 2 1 7 Er L i 2X 2 285 2X 1 3 DIMENSIONS ARE IN MILLIMETERS 4 57 LAND PATTERN RECOMMENDATION 8 7 0 52 0 05 SEATING PLANE 4 32 MIN 9 70 15 0 83 0 1 3X TP 1 I 2 X 2 285 0 51 MIN 0 17 0 52 0 05 120 1 TD03B Rev C 3 Lead D Pack NS Package Number TD03B 1 i 1ol eInb ti ejqeisn py jeu
4. 055 0 130 0 160 yp 1 22 1 40 PIN 1 ID 3 30 4 06 TYP 1 005 1 035 0 027 0 037 25 53 26 29 0 69 0 94 TYP 79 lt 0 525 0 555 Qoi cc 10385 s 13 34 14 10 0 175 0 185 4 45 4 70 0 010 0 25 0 048 0 052 0 105 0 015 2 67 0 38 1 22 1 32 SEATING PLANE TAPERED SIDES 1 3 Lead TO 220 NS Package Number T03B www national com 22 TO3B REV L Physical Dimensions inches millimeters unless otherwise noted Continued 0 090 0 110 2 29 2 79 0 260 0 280 0 575 6 60 7 11 14 61 0 085 vp 0 390 0 410 I ras 2 16 9 91 10 41 o 330 0 350 1 ID 8 38 8 89 0 03 eel R MAX TYP d 54 2 MA E k 015 0 030 is 0 035 10 41 7 0 042 0 175 0 183 10 89 1 07 pon ae LEAD POSITION OVERLAY c 3 0 004 0 10 TAPERED j j 0 048 0 052 SIDES 19 09 69 1 22 1 32 8 59 0 000 0 006 sTAND OFF 0 00 0 15 0 490 VAX 12 45 0 565 MAX 14 35 BACK VIEW 1538 REV C 3 Lead TO 263 NS Package Number TS3B 23 www national com ZLEWTVZLEN LM117 LM317A LM317 Physical Dimensions inches millimeters unless otherwise noted Continued 0 350 0 008 8 890 0 203 NH a m Z 7 zs A 0 200 0 005 5 080 0 127 b a5 0 015 0 010 74 T 0 381 0 254 0 015 0 063 0 075 0 381 A 4 0 007 0 011 1 600 1 905 MIN TYP 0 178
5. 40V 0 3V LM317A 40 C lt T lt 125 Storage Temperature 65 to 150 C LM317 OC lt Tj lt 125 Lead Temperature Metal Package Soldering 10 seconds 300 C Plastic Package Soldering 4 seconds 260 C Thermal Limit Burn in All Devices 100 Preconditioning Electrical Characteristics Note 3 Specifications with standard type face are for T 25 C and those with boldface type apply over full Operating Tempera ture Range Unless otherwise specified Vin 5V and lour 10 mA Parameter Conditions LM117 Note 2 Units Mn Max 3V lt Vin Vout lt 40V lt Line Regulation lt Vin Vout lt 40V Note 4 0 01 0 02 SIN 00 0 05 Load Regulation 10 MA lour lt Imax Note 4 Thermal Regulation 20 ms Pulse Adjustment Pin Current Change 10 MA lout lt Imax UA Temperature Stability lt Ty lt Tmax Minimum Load Current Vin Vout 40V 35 5 mA Current Limit Vin Vout lt 15V K Package A H Package A Vin Vout 40V K Package 0 3 0 4 A H Package 0 15 0 2 RMS Output Noise of Vou 10 Hz lt f lt 10 kHz Ripple Rejection Ratio Vou 10V f 120 Hz dB Capu 0 UF Vout 10V f 120 Hz CADJ 10 UF Long Term Stability T 125 C 1000 hrs Thermal Resistance K Package 2 3 3 CAN Junction to Case H Package 12 15 CAN E Package CAN Thermal Resistance Junction K Package 35 CAN to A
6. Although the LM117 is stable with no output capacitors like any feedback circuit certain values of external capacitance www national com can cause excessive ringing This occurs with values be tween 500 pF and 5000 pF 1uF solid tantalum or 25uF aluminum electrolytic on the output swamps this effect and insures stability Any increase of the load capacitance larger than 10pF will merely improve the loop stability and output impedance LOAD REGULATION The LM117 is capable of providing extremely good load regulation but a few precautions are needed to obtain maxi mum performance The current set resistor connected be tween the adjustment terminal and the output terminal usu ally 240 should be tied directly to the output case of the regulator rather than near the load This eliminates line drops from appearing effectively in series with the reference and degrading regulation For example a 15V regulator with 0 050 resistance between the regulator and load will have a load regulation due to line resistance of 0 050 x If the set resistor is connected near the load the effective line resis tance will be 0 050 1 R2 R1 or in this case 11 5 times worse Figure 2 shows the effect of resistance between the regula tor and 240Q set resistor LM117 VIN 00906306 FIGURE 2 Regulator with Line Resistance in Output Lead With the TO 3 package it is easy to minimize the resistance from the case to the set resi
7. feedback nsc com Email europe support 9 nsc com Email ap support 9 nsc com Email jpn feedback 9 nsc com Tel 1 800 272 9959 Deutsch Tel 49 0 69 9508 6208 Tel 81 3 5639 7560 English Tel 44 0 870 24 0 2171 www national com Frangais Tel 33 0 1 41 91 8790 National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications
8. limit constant with temperature P Product Enhancement tested 80 dB ripple rejection Output is short circuit protected LM117 Series Packages Part Number Design Load Current Package osa _ SOT 223 vs D Pak 252 Packages p TO 252 A SOT 223 00906354 Scale 1 1 www national com ajqeisnipy 2 ZLeIWT IVZLEWTY ZELINT LM117 LM317A LM317 Connection Diagrams TO 3 Metal Can Package ADJUSTMENT VIN 00906330 CASE 15 OUTPUT Bottom View Steel Package NS Package Number K02A or K02C TO 263 Surface Mount Package INPUT TAB IS OUTPUT OUTPUT ADJ 00906335 Top View d WX 00906336 Side View NS Package Number 5 www national com TO 39 Metal Can Package INPUT Q ADJUSTMENT OUTPUT 00906331 CASE 15 OUTPUT Bottom View NS Package Number TO 220 Plastic Package Vout ADJ VIN Vout 00906332 Front View NS Package Number T03B Ceramic Leadless Chip Carrier OUTPUT 00906334 Top View NS Package Number E20A Connection Diagrams Continued 4 Lead SOT 223 TO 252 D Pak ADJ VouT Vout VIN 00906359 Tab is Front View VoUT NS Package Number MP04A Input Output gt Q 00906366 Front View NS Package Number Ordering Information Package Temperature Range Part Number Package Marking Transport Med
9. temperature of the LM317 must be within the range of 0 C to 125 C A heatsink may be required depending on the maximum power dissipation and maximum ambient temperature of the application To deter mine if a heatsink is needed the power dissipated by the regulator Pp must be calculated tle Pp Vin Vla Figure 8 shows the voltage and currents which are present in the circuit 00906360 FIGURE 8 Power Dissipation Diagram The next parameter which must be calculated is the maxi mum allowable temperature rise T max T max where T is the maximum allowable junction tempera ture 125 C and T max is the maximum ambient tem perature which will be encountered in the application Using the calculated values for T max and Pp the maxi mum allowable value for the junction to ambient thermal resistance 0 4 can be calculated Ta max Pp If the maximum allowable value for is found to be gt 92 C W Typical Rated Value for TO 252 package no heatsink is needed since the package alone will dissipate enough heat to satisfy these requirements If the calculated value for falls below these limits a heatsink is required As a design aid Table 1 shows the value of the 0 4 of TO 252 for different heatsink area The copper patterns that we used to measure these 0 4s are shown at the end of the Application Notes Section Figure 9 refle
10. there is insufficient load on the output the output will rise EXTERNAL CAPACITORS An input bypass capacitor is recommended 0 1uF disc or 1pF solid tantalum on the input is suitable input bypassing for almost all applications The device is more sensitive to the absence of input bypassing when adjustment or output Capacitors are used but the above values will eliminate the possibility of problems The adjustment terminal can be bypassed to ground on the LM117 to improve ripple rejection This bypass capacitor prevents ripple from being amplified as the output voltage is increased With a 10pF bypass capacitor 80dB ripple rejec tion is obtainable at any output level Increases over 10 do not appreciably improve the ripple rejection at frequencies above 120Hz If the bypass capacitor is used it is some times necessary to include protection diodes to prevent the capacitor from discharging through internal low current paths and damaging the device In general the best type of capacitors to use is solid tanta lum Solid tantalum capacitors have low impedance even at high frequencies Depending upon capacitor construction it takes about 25uF in aluminum electrolytic to equal 1uF solid tantalum at high frequencies Ceramic capacitors are also good at high frequencies but some types have a large decrease in capacitance at frequencies around 0 5MHz For this reason 0 01uF disc may seem to work better than a O 1pF disc as a bypass
11. 80 11 05 TO 3 Metal Can Package K NS Package Number K02A 0 420 0 500 0 285 0 305 10 67 12 70 7 24 7 75 0 980 1 020 _ 23 50 19 150 161 24 89 25 91 3 84 4 09 _ _ n 0 495 0 510 12 57 12 95 0 660 0 670 16 76 17 02 0 880 0 915 0 22 35 23 24 2 g 0 760 0 775 19 30 19 69 1 177 1 197 29 90 30 40 2X 0 3 05 0 038 0 043 Eg 0 97 1 09 UNCONTROLLED 0 210 0 220 0 168 0 178 Z 0 085 a CN 2X R CU H 5 33 5 59 4 27 4 52 0 76 MAX 2 16 9 425 0 435 SEATING PLANE AZO AREY B 10 80 11 05 TO 3 Metal Can Package K Mil Aero Product NS Package Number K02C 21 www national com ZLEWTVZLEN LM117 LM317A LM317 Physical Dimensions inches millimeters unless otherwise noted Continued 0 350 0 370 DIA 8 890 9 398 0 315 0 335 c DIA 0 165 0 185 8 001 8 509 0 050 4 191 4 699 1 270 0 025 Y UNCONTROLLED 0 635 LEAD DIA 12 l Rn 0016 0019 5 TYP 0 406 0 483 0 200 1 5 080 SEATING PLANE YP 0 100 2 540 0 100 2 540 0 029 0 040 0 737 1 018 0 028 0 034 H03A REV B TO 39 Metal Can Package NS Package Number H03A 0 240 0 260 6 10 6 60 0 330 0 350 8 38 8 89 1511 g 0 149 0 153 2 54 3 05 3 78 3 89 zn 2 29 2 79 0 400 0 005 _ 29 2 0 190 0 210 10 16 17715 4 83 5 33 0 048 0
12. LM117 VIN outputs within 100 mV load 10 mA www national com 18 Vout 00906324 Typical Applications Continued AC Voltage Regulator LM317 24Vp p 00906325 12V Battery Charger LM317 Rg 00906326 Rs sets output impedance of charger Rs 1 i Use of Rs allows low charging rates with fully charged battery 50 Constant Current Battery Charger LM317 00906327 19 www national com ZLEWTVZLEN LM117 LM317A LM317 Typical Applications Continued Adjustable 4A Regulator Current Limited 6V Charger LM317 VIN 9V TO 40V 2N2222 00906329 Sets peak current 0 6A for 10 The 1000yF is recommended to filter out input transients www national com 20 4 5V TO 25V 00906328 Digitally Selected Outputs LM117 INPUTS 00906302 Sets maximum Physical Dimensions inches millimeters unless otherwise noted 0 420 0 500 0 325 0 352 10 67 12 70 8 26 8 94 0 980 1 020 2x g 0 151 0 161 24 89 25 91 0 060 0 070 3 84 4 09 1 52 1 78 2 R 0 495 0 510 12 57 12 95 0 660 0 670 16 76 17 02 g 0 880 0 915 22 55 23 24 _ g 0 760 0 775 _ 19 30 19 69 1 177 1 197 29 90 30 40 0 038 0 043 2X 0 97 1 09 NS UNCONTROLLED 0 210 0 220 0 116 u 4 27 4 52 5 5 33 5 59 0 64 MAX 2 95 X o SEATING PLANE KO REN M 10
13. ST LM317k OUTPUT 35V 1 2V 30V VOLTAGE ADJUST I 00906315 TSolid tantalum Lights in constant current mode 1A Current Regulator High Gain Amplifier LM117 00906316 INPUT 1 2V 20V Regulator with Minimum Program Current LM117 00906318 00906317 Minimum load current 4 mA www national com 16 Typical Applications Continued Low Cost 3A Switching Regulator 01 2N3792 v 8V 35V VIN VOUT 1 8V TO 32V an R4 R3 C2 5k 240 ci 0 01 F OUTPUT mg C4 50 ADJUST 45 100 F R5 100 D1 C3 1N3880 300 pF 00906319 TSolid tantalum Core Arnold A 254168 2 60 turns 4A Switching Regulator with Overload Protection 3 LM195 IN PARALLEL VOUT 1 8V TO 32V 1N3880 1004F 00906320 TSolid tantalum Core Arnold A 254168 2 60 turns Precision Current Limiter LM117 VIN 0 80 lt R1 lt 1202 00906321 17 www national com ZLEWTVZLEN LM117 LM317A LM317 Typical Applications Continued Tracking Preregulator R2 720 ADJUST 00906322 Current Limited Voltage Regulator TRANSFORMERS RECTIFIERS AND FILTER CAPACITOR R4 2 102 R3 470 00906323 D 600 mV Short circuit current is approximately or 120 mA Compared to LM117 s higher current limit At 50 mA output only volt of drop occurs in Rs and R4 Adjusting Multiple On Card Regulators with Single Control
14. ch of copper area is 37 C W and with 1 6 or more square inches of copper area Oja is 32 C W If the SOT 223 package is used the thermal resistance can be reduced by increasing the PC board copper area see applications hints for heatsinking 5 www national com ZLEWTVZLEWNT LEELWT LM117 LM317A LM317 Typical Performance Characteristics Output Capacitor OuF unless otherwise noted OUTPUT VOLTAGE DEVIATION Load Regulation FAS AN SEND 75 50 25 0 25 50 75 100 125 150 TEMPERATURE 00906337 Adjustment Current ac a gt cC P LLJ e 75 50 25 0 25 50 75 100 125 150 TEMPERATURE 00906339 Temperature Stability 1 260 gt 1 250 c x 2 1 240 e cc i 1 230 1 220 www national com 75 50 25 0 25 50 75 100 125 150 TEMPERATURE C 00906341 OUTPUT CURRENT A INPUT OUTPUT DIFFERENTIAL V QUIESCENT CURRENT mA Current Limit 0 10 20 INPUT OUTPUT DIFFERENTIAL V 00906338 Dropout Voltage AVgouT 100 mV 75 50 25 0 25 50 75 100 125 150 TEMPERATURE C 00906340 Minimum Operating Current 117 932 Cone lm lll ge lli 4 5 4 0 3 5 3 0 2 5 2 0 1 5 1 0 0 5 0 N Tj 25 C 10 20 30 40 INPUT OUTPUT DIFFERENTIAL V 00906342 Performance Characteristics Output Capacitor OuF unle
15. ction is needed for output voltages of 25V or less and 10uF capacitance Figure shows an LM117 with protection diodes included for use with outputs greater than 25V and high values of output capacitance D1 1N4002 VIN V 00906307 R2 Vout 1 25 1 RI lapJR2 D1 protects against C1 D2 protects against C2 FIGURE 3 Regulator with Protection Diodes When a value 04 4 is found using the equation shown a heatsink must be selected that has a value that is less than or equal to this number IS specified numerically by the heatsink manufacturer in the catalog or shown in a curve that plots temperature rise vs power dissipation for the heatsink HEATSINKING TO 263 SOT 223 AND TO 252 PACKAGE PARTS The 263 5 SOT 223 MP and TO 252 DT pack ages use a copper plane on the PCB and the PCB itself as a heatsink To optimize the heat sinking ability of the plane and PCB solder the tab of the package to the plane Figure 4 shows for the TO 263 the measured values of 0 4j for different copper area sizes using a typical PCB with 1 ounce copper and no solder mask over the copper area used for heatsinking 80 70 60 50 40 THERMAL RESISTANCE J A IN C W 30 0 1 2 5 COPPER FOIL AREA SQ IN 00906355 FIGURE 4 _ vs Copper 1 ounce Area for the TO 263 Package As shown in the figure increasing the copper area beyond 1 square inch produces very little
16. cts the same test results as what are in the Table 1 Figure 10 shows the maximum allowable power dissipation vs ambient temperature for the TO 252 device Figure 11 shows the maximum allowable power dissipation vs copper area in for the TO 252 device Please see AN1028 for power enhancement techniques to be used with SOT 223 and TO 252 packages TABLE 1 0 4 Different Heatsink Area Copper Area Thermal Resistance Top Side in www national com Bottom Side in C W 252 Application Hints continued TABLE 1 0 4 Different Heatsink Area Continued Copper Area Thermal Resistance 57 57 72 61 55 53 1 5 2206 Still Air SN Z Cu wq 0 0 2 0 4 0 6 0 8 1 0 207 Copper Area in T0252 00906361 FIGURE 9 0 4 vs 202 Copper Area for TO 252 Still Air 207 Cu on Top PI 0 60oc W __ 21 N 47 XD RR NNNSNN LIO NNR 879 SAS 0j 103 C W 0 25 50 75 100 125 Maximum Allowable Power Dissipation W Ambient Temperature C T0252 00906363 FIGURE 10 Maximum Allowable Power Dissipation vs Ambient Temperature for 252 11 www national com ZLEWTVZLEWT LEELWT LM117 LM317A LM317 Application Hints Continued Maximum Allowable Power Dissipation W 20z Copper Area 112 10252 00906362 FIGURE 11 Maximum Allowable Power Dissipation vs 202 Copper Area TO 252 00906364 FIGURE 12 To
17. ia NSC Drawing Metal Can 55 C lt Tj lt 150 50 Per Bag K02A TO 3 0 C lt T lt 125 C 50 Per Bag 55 C lt T lt 150 C 50 Per Bag K02C Metal Can 55 C lt Tj lt 150 C 500 Per Box 39 55 C lt T 150 C 20 Per Tray 40 C T lt 125 C 500 Per Box 0 C lt T lt 125 C 500 Per Box 220 40 C lt T lt 125 45 Units Rail T03B 3 Lead 0C lt T lt 125 C 45 Units Rail TO 263 OC lt Tj lt 125 C LM317S LM317S P 45 Units Rail TS3B 3 Lead LM317SX 500 Units Tape and Reel LCC 55 lt T 150 C LM117E 883 LM117E 883 50 Units Rail E20A SOT 223 OC lt Tj lt 125 LM317EMP 1 1k Units Tape and Reel 4 Lead LM317EMPX 2k Units Tape and Reel 40 C lt T lt 125 C NO7A 1k Units Tape and Reel 2k Units Tape and Reel D Pack lt Tj lt 125 C LM317MDT 75 Units Rail TD03B 3 Lead 2 5k Units Tape and Reel 40 C lt T lt 125 C LM317AMDT 75 Units Rail MER 2 5k Units Tape and Reel 3 www national com ZLEWNTVZLEN TLEELWT LM117 LM317A LM317 Absolute Maximum Ratings Note 1 ESD Tolerance Note 5 3 kV If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Operating Tem peratu re Range Distributors for availability and specifications Power Dissipation Internally Limited LM117 55 C lt Tj lt 150 Input Output Voltage Differential
18. improvement It should also be observed that the minimum value of 0 4 for the TO 263 package mounted to a PCB is 32 C W As a design aid Figure 5 shows the maximum allowable power dissipation compared to ambient temperature for the TO 263 device assuming 0 4 is 35 and the maxi mum junction temperature is 125 C TO 263 PACKAGE PCB MOUNT 1 SQ IN COPPER MAX POWER DISSIPATION W 40 25 25 75 125 AMBIENT TEMPERATURE C 00906356 FIGURE 5 Maximum Power Dissipation vs for the TO 263 Package Figure 6 and Figure 7 show the information for the SOT 223 package Figure 7 assumes a 0 _A of 74 C W for 1 ounce copper and 51 C W for 2 ounce copper and a maximum junction temperature of 125 C www national com ZLEWTVZLEWTZELWT LM117 LM317A LM317 Application Hints Continued 170 re C THERMAL RESISTANCE J A IN C W 0 1 2 COPPER FOIL AREA SQ IN 00906357 FIGURE 6 0 4 vs Copper 2 ounce Area for the SOT 223 Package SOT 223 PACKAGE PCB MOUNT 1 SQ IN COPPER 2 OUNCE COPPER dd MAX POWER DISSIPATION W dd 1 OUNCE COPPER 40 25 25 75 125 AMBIENT TEMPERATURE C 00906358 FIGURE 7 Maximum Power Dissipation vs for the SOT 223 Package The LM317 regulators have internal thermal shutdown to protect the device from over heating Under all possible operating conditions the junction
19. lmal ZLEINTV VZLEWV ZELIT LIFE SUPPORT POLICY NATIONAL S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or 2 A critical component is any component of a life systems which a are intended for surgical implant Support device or system whose failure to perform into the body or b support or sustain life and can be reasonably expected to cause the failure of whose failure to perform when properly used in the life support device or system or to affect its accordance with instructions for use provided in the safety or effectiveness labeling can be reasonably expected to result in a significant injury to the user BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification CSP 9 111C2 and the Banned Substances and Materials of Interest Specification CSP 9 111S2 and contain no Banned Substances as defined in 5 9 11152 National Semiconductor National Semiconductor National Semiconductor National Semiconductor Americas Customer Europe Customer Support Center Asia Pacific Customer Japan Customer Support Center Support Center Fax 49 0 180 530 85 86 Support Center Fax 81 3 5639 7507 Email new
20. mbient No Heat Sink H Package 140 CAN E Package CAN www national com 4 Electrical Characteristics 3 Specifications with standard type face are for T 25 C and those with boldface type apply over full Operating Tempera ture Range Unless otherwise specified Vin Vour 5V and lour 10 mA Parameter Conditions Units MELLE ELEME Reference Voltage 3V lt lt 40V 1 FI 10 mA lt lout Imax P lt Pmax Line Regulation lt Vin lt 40V Note 4 0 005 0 01 0 01 0 04 o oo 002 007 V Load Regulation 10 mA lour lt Imax Note 4 __ ot 05 o1 05 Adjustment Pin Current 10 mA lout Imax 3V lt Vin Vout 40V Minimum Load Current Vin Vout 40V 35 10 _ 35 10 mA Current Limit Vin Vout lt 15V K T S Packages 3 4 A H Package 1 8 3 4 A Vin Vout 40V K T S Packages 0 15 0 4 0 15 0 4 A H Package 0 075 0 2 0 075 0 2 A MP Package D 15 0 4 0 15 0 4 A Ripple Rejection Ratio Vout TOV f 120 Hz dB Capu 0 UF 10V f 120 Hz dB Thermal Resistance K Package CAN Junction to Case MDT Package CAN H Package 15 CAN T Package CAN MP Package C W Thermal Resistance K Package C W Junction to Ambient No Heat MDT Package Note 6 C W Sink H Package C W T Package C W S Package Note 6
21. p View of the Thermal Test Pattern in Actual Scale www national com 12 Application Hints continued 00906365 FIGURE 13 Bottom View of the Thermal Test Pattern in Actual Scale 13 www national com ZLEWTVZLEN LM117 LM317A LM317 Schematic Diagram Typical Applications 5V Logic Regulator with Electronic Shutdown Vin 7V 35V LM117 Min output 1 2V VIN www national com Slow Turn On 15V Regulator LM117 TTL 00906303 VOUT 15V 1N4002 00906309 R2 R3 R4 310 190 82 010 A 14 R15 2 4k 500 00906308 Adjustable Regulator with Improved Ripple Rejection LM117 VIN D1 C2 1N4002 0 1uF L ut 00906310 TSolid tantalum Discharges C1 if output is shorted to ground High Stability 10V Regulator LM117 LM129A 00906311 Typical Applications Continued High Current Adjustable Regulator 3 LM195 S IN PARALLEL Vout 1N4002 C3 00906312 Optional improves ripple rejection Solid tantalum Minimum load current 30 mA 0 to 30V Regulator Power Follower LM117 10V 40V VOUT 150 INPUT LM195 OUTPUT 0 6A LM117 R2 2 4 00906313 Full output current not available at high input output voltages 00906314 15 www national com ZLEWTVZLEN LM117 LM317A LM317 Typical Applications Continued 5A Constant Voltage Constant Current Regulator MJ4502 CURRENT ADJU
22. ss otherwise noted Continued Ripple Rejection Ripple Rejection RIPPLE REJECTION dB RIPPLE REJECTION dB OUTPUT VOLTAGE V FREQUENCY Hz 00906343 00906344 Ripple Rejection Output Impedance Lay LU s 8 lt eo 1071 cc Tx 10 C 3 ur BE RM 10 100 1k 10k 700k 1M OUTPUT CURRENT A FREQUENCY Hz 00906345 00906346 Line Transient Response Load Transient Response T TERM lt lt E rz oo oO gt gt e 2 5 2 e lt E gt Z e FE ss 7 gt I 0 0 10 20 30 40 3 TIME us TIME us 00906347 00906348 7 www national com ZLEWTVZLEWT LEELWT LM117 LM317A LM317 Application Hints In operation the LM117 develops a nominal 1 25V reference voltage Vagre between the output and adjustment terminal The reference voltage is impressed across program resistor H1 and since the voltage is constant a constant current 1 then flows through the output set resistor R2 giving an output voltage of R2 Vour VnEF 1 a2 lap J R2 LM117 00906305 FIGURE 1 Since the 100pA current from the adjustment terminal repre sents an error term the LM117 was designed to minimize lapy and make it very constant with line and load changes To do this all quiescent operating current is returned to the output establishing a minimum load current requirement If
23. stor by using two separate leads to the case However with the TO 39 package care should be taken to minimize the wire length of the output lead The ground of R2 can be returned near the ground of the load to provide remote ground sensing and improve load regulation PROTECTION DIODES 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 Most 10uF capacitors have low enough internal series resistance to deliver 20A spikes when shorted Although the surge is short there is enough energy to damage parts of the IC When an output capacitor is connected to a regulator and the input is shorted the output capacitor will discharge into the output of the regulator The discharge current depends on the value of the capacitor the output voltage of the regulator and the rate of decrease of Vn In the LM117 this discharge path is through a large junction that is able to sustain 15A surge with no problem This is not true of other types of positive regulators For output capacitors of 25uF or less there is no need to use diodes The bypass capacitor on the adjustment terminal can dis charge through a low current junction Discharge occurs Application Hints continued when either the input or output is shorted Internal to the LM117 is a 500 resistor which limits the peak discharge current No prote
24. t to output differential volt Typical Applications 1 2V 25V Adjustable Regulator LM117 00906301 Full output current not available at high input output voltages Needed if device is more than 6 inches from filter capacitors TOptional improves transient response Output capacitors in the range of 1 to 1000uF of aluminum or tantalum electrolytic are commonly used to provide improved output impedance and rejection of transients R2 TTVour 1 25V 1 i t lApJ R2 DS009063 age supplies of several hundred volts can be regulated as long as the maximum input to output differential is not ex ceeded i e avoid short circuiting the output Also it makes an especially simple adjustable switching regulator a programmable output regulator or by connecting a fixed resistor between the adjustment pin and output the LM117 can be used as a precision current regulator Sup plies with electronic shutdown can be achieved by clamping the adjustment terminal to ground which programs the out put to 1 2V where most loads draw little current For applications requiring greater output current see LM150 series SA and LM138 series 5A data sheets For the negative complement see LM137 series data sheet Features Guaranteed 1 output voltage tolerance LM31 7A Guaranteed max 0 01 V line regulation LM317A Guaranteed max 0 3 load regulation LM117 Guaranteed 1 5A output current Adjustable output down to 1 2V Current
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National Semiconductor LM117/LM317A/LM317 handbook