LM117/LM317A/LM317 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 terminal 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 standard 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 input-to-output differential volt- Typical Applications age, supplies of several hundred volts can be regulated as long as the maximum input to output differential is not exceeded, 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. Supplies with electronic shutdown can be achieved by clamping the adjustment terminal to ground which programs the output to 1.2V where most loads draw little current. For applications requiring greater output current, see LM150 series (3A) and LM138 series (5A) data sheets. For the negative complement, see LM137 series data sheet. Features n n n n n n n n n Guaranteed 1% output voltage tolerance (LM317A) 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 limit constant with temperature P+ Product Enhancement tested 80 dB ripple rejection Output is short-circuit protected LM117 Series Packages Part Number 1.2V–25V Adjustable Regulator Suffix Design Package Load Current 00906301 Full output current not available at high input-output voltages *Needed if device is more than 6 inches from filter capacitors. K TO-3 1.5A H TO-39 0.5A T TO-220 1.5A E LCC 0.5A S TO-263 1.5A EMP SOT-223 1A MDT TO-252 0.5A SOT-223 vs. D-Pak (TO-252) Packages †Optional — improves transient response. Output capacitors in the range of 1µF to 1000µF of aluminum or tantalum electrolytic are commonly used to provide improved output impedance and rejection of transients. 00906354 Scale 1:1 © 2004 National Semiconductor Corporation DS009063 www.national.com LM117/LM317A/LM317 3-Terminal Adjustable Regulator July 2004 LM117/LM317A/LM317 Connection Diagrams (TO-3) Metal Can Package (TO-39) Metal Can Package 00906331 CASE IS OUTPUT Bottom View NS Package Number H03A 00906330 CASE IS OUTPUT Bottom View Steel Package NS Package Number K02A or K02C (TO-220) Plastic Package (TO-263) Surface-Mount Package 00906335 Top View 00906332 Front View NS Package Number T03B Ceramic Leadless Chip Carrier 00906336 Side View NS Package Number TS3B 00906334 Top View NS Package Number E20A www.national.com 2 LM117/LM317A/LM317 Connection Diagrams (Continued) 4-Lead SOT-223 TO-252 (D-Pak) 00906359 Front View NS Package Number MP04A 00906366 Front View NS Package Number TD03B Ordering Information Package Temperature Range Part Number Package Marking Transport Media NSC Drawing Metal Can (TO-3) −55˚C ≤ TJ ≤ +150˚C LM117K STEEL 0˚C ≤ TJ ≤ +125˚C LM317K STEEL LM117K STEEL P+ 50 Per Bag K02A LM317K STEEL P+ 50 Per Bag −55˚C ≤ TJ ≤ +150˚C LM117K/883 LM117K/883 50 Per Bag K02C Metal Can (TO-39) −55˚C ≤ TJ ≤ +150˚C LM117H LM117H P+ 500 Per Box H03A −55˚C ≤ TJ ≤ +150˚C LM117H/883 LM117H/883 20 Per Tray −40˚C ≤ TJ ≤ +125˚C LM317AH LM317AH P+ 500 Per Box 0˚C ≤ TJ ≤ +125˚C LM317H LM317H P+ 500 Per Box TO-220 3- Lead −40˚C ≤ TJ ≤ +125˚C LM317AT LM317AT P+ 45 Units/Rail 0˚C ≤ TJ ≤ +125˚C LM317T LM317T P+ 45 Units/Rail TO-263 3- Lead 0˚C ≤ TJ ≤ +125˚C LM317S LM317S P+ LCC −55˚C ≤ TJ ≤ +150˚C SOT-223 4- Lead 0˚C ≤ TJ ≤ +125˚C LM317SX LM117E/883 LM117E/883 50 Units/Rail E20A LM317EMP N01A 1k Units Tape and Reel MP04A 2k Units Tape and Reel LM317AEMP N07A LM317AEMPX D- Pack 3- Lead 0˚C ≤ TJ ≤ +125˚C 1k Units Tape and Reel 2k Units Tape and Reel LM317MDT LM317MDT LM317MDTX −40˚C ≤ TJ ≤ +125˚C TS3B 500 Units Tape and Reel LM317EMPX −40˚C ≤ TJ ≤ +125˚C 45 Units/Rail T03B 75 Units/Rail TD03B 2.5k Units Tape and Reel LM317AMDT LM317AMDT LM317AMDTX 75 Units/Rail 2.5k Units Tape and Reel 3 www.national.com LM117/LM317A/LM317 Absolute Maximum Ratings (Note 1) ESD Tolerance (Note 5) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Dissipation Storage Temperature Operating Temperature Range Internally Limited Input-Output Voltage Differential 3 kV +40V, −0.3V LM117 −55˚C ≤ TJ ≤ +150˚C LM317A −40˚C ≤ TJ ≤ +125˚C 0˚C ≤ TJ ≤ +125˚C LM317 −65˚C to +150˚C Lead Temperature Metal Package (Soldering, 10 seconds) 300˚C Plastic Package (Soldering, 4 seconds) 260˚C Preconditioning Thermal Limit Burn-In All Devices 100% Electrical Characteristics (Note 3) Specifications with standard type face are for TJ = 25˚C, and those with boldface type apply over full Operating Temperature Range. Unless otherwise specified, VIN − VOUT = 5V, and IOUT = 10 mA. Parameter Conditions LM117 (Note 2) Units Min Typ Max 1.20 1.25 1.30 V 0.01 0.02 %/V 0.02 0.05 %/V 0.3 % Reference Voltage V 3V ≤ (VIN − VOUT) ≤ 40V, 10 mA ≤ IOUT ≤ IMAX, P ≤ PMAX Line Regulation 3V ≤ (VIN − VOUT) ≤ 40V (Note 4) Load Regulation 10 mA ≤ IOUT ≤ IMAX (Note 4) 0.1 0.3 1 % Thermal Regulation 20 ms Pulse 0.03 0.07 %/W 50 100 µA Adjustment Pin Current Change 10 mA ≤ IOUT ≤ IMAX 0.2 5 µA Temperature Stability TMIN ≤ TJ ≤ TMAX Minimum Load Current (VIN − VOUT) = 40V 5 mA Current Limit (VIN − VOUT) ≤ 15V Adjustment Pin Current 3V ≤ (VIN − VOUT) ≤ 40V 1 3.5 % K Package 1.5 2.2 3.4 A H Package 0.5 0.8 1.8 A 0.3 0.4 0.15 0.2 A 0.003 % 65 dB 80 dB (VIN − VOUT) = 40V K Package H Package RMS Output Noise, % of VOUT 10 Hz ≤ f ≤ 10 kHz Ripple Rejection Ratio VOUT = 10V, f = 120 Hz, A CADJ = 0 µF VOUT = 10V, f = 120 Hz, 66 CADJ = 10 µF Long-Term Stability TJ = 125˚C, 1000 hrs 0.3 1 % Thermal Resistance, K Package 2.3 3 ˚C/W Junction-to-Case H Package 12 15 ˚C/W Thermal Resistance, Junction- K Package 35 ˚C/W to-Ambient (No Heat Sink) H Package 140 ˚C/W E Package ˚C/W E Package www.national.com ˚C/W 4 Specifications with standard type face are for TJ = 25˚C, and those with boldface type apply over full Operating Temperature Range. Unless otherwise specified, VIN − VOUT = 5V, and IOUT = 10 mA. Parameter Conditions LM317A Reference Voltage 3V ≤ (VIN − VOUT) ≤ 40V, LM317 Min Typ Max 1.238 1.250 1.262 1.225 1.250 1.270 0.005 0.01 Units Min Typ Max 1.20 1.25 1.30 V 0.01 0.01 0.04 %/V 0.02 0.02 0.07 %/V V 10 mA ≤ IOUT ≤ IMAX, P ≤ PMAX Line Regulation Load Regulation Thermal Regulation 3V ≤ (VIN − VOUT) ≤ 40V (Note 4) 10 mA ≤ IOUT ≤ IMAX (Note 4) 20 ms Pulse Adjustment Pin Current Adjustment Pin Current Change 10 mA ≤ IOUT ≤ IMAX Temperature Stability TMIN ≤ TJ ≤ TMAX Minimum Load Current (VIN − VOUT) = 40V Current Limit (VIN − VOUT) ≤ 15V 0.1 0.5 0.1 0.5 % 0.3 1 0.3 1.5 % 0.04 0.07 0.04 0.07 %/W 50 100 50 100 µA 0.2 5 0.2 5 µA 3V ≤ (VIN − VOUT) ≤ 40V 1 3.5 1 10 3.5 % 10 mA K, T, S Packages 1.5 2.2 3.4 1.5 2.2 3.4 A H Package MP Package 0.5 1.5 0.8 2.2 1.8 3.4 0.5 1.5 0.8 2.2 1.8 3.4 A A K, T, S Packages 0.15 0.4 0.15 0.4 A H Package MP Package 0.075 0.15 0.2 0.4 0.075 0.15 0.2 0.4 A A (VIN − VOUT) = 40V RMS Output Noise, % of VOUT 10 Hz ≤ f ≤ 10 kHz Ripple Rejection Ratio VOUT = 10V, f = 120 Hz, 0.003 0.003 % 65 65 dB 80 dB CADJ = 0 µF VOUT = 10V, f = 120 Hz, 66 80 66 CADJ = 10 µF Long-Term Stability TJ = 125˚C, 1000 hrs Thermal Resistance, Junction-to-Case K Package MDT Package 0.3 H Package T Package MP Package Thermal Resistance, Junction-to-Ambient (No Heat Sink) 1 0.3 1 % 2.3 5 3 ˚C/W ˚C/W 15 12 15 12 4 23.5 5 4 23.5 ˚C/W ˚C/W ˚C/W ˚C/W ˚C/W K Package MDT Package(Note 6) 35 35 92 H Package 140 140 ˚C/W T Package 50 50 ˚C/W S Package (Note 6) 50 50 ˚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 TO-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 kΩ 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. θJA is 50˚C/W; with 1 square inch of copper area, θJA is 37˚C/W; and with 1.6 or more square inches of copper area, θJA 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 LM117/LM317A/LM317 Electrical Characteristics (Note 3) LM117/LM317A/LM317 Typical Performance Characteristics Output Capacitor = 0µF unless otherwise noted Load Regulation Current Limit 00906337 00906338 Adjustment Current Dropout Voltage 00906340 00906339 Temperature Stability Minimum Operating Current 00906341 www.national.com 00906342 6 Ripple Rejection (Continued) Ripple Rejection 00906344 00906343 Ripple Rejection Output Impedance 00906346 00906345 Line Transient Response Load Transient Response 00906347 00906348 7 www.national.com LM117/LM317A/LM317 Typical Performance Characteristics Output Capacitor = 0µF unless otherwise noted LM117/LM317A/LM317 can cause excessive ringing. This occurs with values between 500 pF and 5000 pF. A 1µF solid tantalum (or 25µF aluminum electrolytic) on the output swamps this effect and insures stability. Any increase of the load capacitance larger than 10µF will merely improve the loop stability and output impedance. Application Hints In operation, the LM117 develops a nominal 1.25V reference voltage, VREF, between the output and adjustment terminal. The reference voltage is impressed across program resistor R1 and, since the voltage is constant, a constant current I1 then flows through the output set resistor R2, giving an output voltage of LOAD REGULATION The LM117 is capable of providing extremely good load regulation but a few precautions are needed to obtain maximum performance. The current set resistor connected between the adjustment terminal and the output terminal (usually 240Ω) 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 0.05Ω resistance between the regulator and load will have a load regulation due to line resistance of 0.05Ω x IL. If the set resistor is connected near the load the effective line resistance will be 0.05Ω (1 + R2/R1) or in this case, 11.5 times worse. Figure 2 shows the effect of resistance between the regulator and 240Ω set resistor. 00906305 FIGURE 1. Since the 100µA current from the adjustment terminal represents an error term, the LM117 was designed to minimize IADJ 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 there is insufficient load on the output, the output will rise. 00906306 FIGURE 2. Regulator with Line Resistance in Output Lead EXTERNAL CAPACITORS An input bypass capacitor is recommended. A 0.1µF disc or 1µF 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 10µF bypass capacitor 80dB ripple rejection is obtainable at any output level. Increases over 10µF do not appreciably improve the ripple rejection at frequencies above 120Hz. If the bypass capacitor is used, it is sometimes 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 tantalum. Solid tantalum capacitors have low impedance even at high frequencies. Depending upon capacitor construction, it takes about 25µF in aluminum electrolytic to equal 1µF 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, 0.01µF disc may seem to work better than a 0.1µF disc as a bypass. Although the LM117 is stable with no output capacitors, like any feedback circuit, certain values of external capacitance www.national.com With the TO-3 package, it is easy to minimize the resistance from the case to the set resistor, 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 10µF 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 VIN. 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 25µF or less, there is no need to use diodes. The bypass capacitor on the adjustment terminal can discharge through a low current junction. Discharge occurs 8 LM117/LM317A/LM317 Application Hints (Continued) when either the input or output is shorted. Internal to the LM117 is a 50Ω resistor which limits the peak discharge current. No protection is needed for output voltages of 25V or less and 10µF capacitance. Figure 3 shows an LM117 with protection diodes included for use with outputs greater than 25V and high values of output capacitance. 00906355 FIGURE 4. θ(J−A) vs Copper (1 ounce) Area for the TO-263 Package 00906307 As shown in the figure, increasing the copper area beyond 1 square inch produces very little improvement. It should also be observed that the minimum value of θ(J−A) 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 θ(J−A) is 35˚C/W and the maximum junction temperature is 125˚C). D1 protects against C1 D2 protects against C2 FIGURE 3. Regulator with Protection Diodes When a value for θ(H−A) is found using the equation shown, a heatsink must be selected that has a value that is less than or equal to this number. θ(H−A) 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 TO-263 (“S”), SOT-223 (“MP”) and TO-252 (”DT”) packages 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 θ(J−A) for different copper area sizes using a typical PCB with 1 ounce copper and no solder mask over the copper area used for heatsinking. 00906356 FIGURE 5. Maximum Power Dissipation vs TAMB for the TO-263 Package Figure 6 and Figure 7 show the information for the SOT-223 package. Figure 7 assumes a θ(J−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. 9 www.national.com LM117/LM317A/LM317 Application Hints mine if a heatsink is needed, the power dissipated by the regulator, PD, must be calculated: IIN = IL + IG PD = (VIN − VOUT) IL + VINIG Figure 8 shows the voltage and currents which are present in the circuit. (Continued) 00906360 00906357 FIGURE 8. Power Dissipation Diagram FIGURE 6. θ(J−A) vs Copper (2 ounce) Area for the SOT-223 Package The next parameter which must be calculated is the maximum allowable temperature rise, TR(max): TR(max) = TJ(max) − TA(max) where TJ(max) is the maximum allowable junction temperature (125˚C), and TA(max) is the maximum ambient temperature which will be encountered in the application. Using the calculated values for TR(max) and PD, the maximum allowable value for the junction-to-ambient thermal resistance (θJA) can be calculated: θJA = TR(max)/PD If the maximum allowable value for θJA is found to be ≥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 θJA falls below these limits, a heatsink is required. As a design aid, Table 1 shows the value of the θJA of TO-252 for different heatsink area. The copper patterns that we used to measure these θJAs are shown at the end of the Application Notes Section. Figure 9 reflects 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 (in2) for the TO-252 device. Please see AN1028 for power enhancement techniques to be used with SOT-223 and TO-252 packages. 00906358 FIGURE 7. Maximum Power Dissipation vs TAMB 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 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- TABLE 1. θJA Different Heatsink Area Layout www.national.com Copper Area Thermal Resistance Top Side (in2)* Bottom Side (in2) (θJA˚C/W) TO-252 1 0.0123 0 103 2 0.066 0 87 3 0.3 0 60 4 0.53 0 54 5 0.76 0 52 6 1 0 47 7 0 0.2 84 8 0 0.4 70 9 0 0.6 63 10 LM117/LM317A/LM317 Application Hints (Continued) TABLE 1. θJA Different Heatsink Area (Continued) Layout Copper Area Thermal Resistance 10 0 0.8 57 11 0 1 57 12 0.066 0.066 89 13 0.175 0.175 72 14 0.284 0.284 61 15 0.392 0.392 55 16 0.5 0.5 53 Note: * Tab of device attached to topside of copper. 00906361 FIGURE 9. θJA vs 2oz Copper Area for TO-252 00906363 FIGURE 10. Maximum Allowable Power Dissipation vs. Ambient Temperature for TO-252 11 www.national.com LM117/LM317A/LM317 Application Hints (Continued) 00906362 FIGURE 11. Maximum Allowable Power Dissipation vs. 2oz Copper Area for TO-252 00906364 FIGURE 12. Top View of the Thermal Test Pattern in Actual Scale www.national.com 12 LM117/LM317A/LM317 Application Hints (Continued) 00906365 FIGURE 13. Bottom View of the Thermal Test Pattern in Actual Scale 13 www.national.com LM117/LM317A/LM317 Schematic Diagram 00906308 Typical Applications Adjustable Regulator with Improved Ripple Rejection 5V Logic Regulator with Electronic Shutdown* 00906310 †Solid tantalum *Discharges C1 if output is shorted to ground 00906303 *Min. output ) 1.2V High Stability 10V Regulator Slow Turn-On 15V Regulator 00906309 00906311 www.national.com 14 LM117/LM317A/LM317 Typical Applications (Continued) High Current Adjustable Regulator 00906312 ‡ Optional — improves ripple rejection †Solid tantalum *Minimum load current = 30 mA Power Follower 0 to 30V Regulator 00906313 00906314 Full output current not available at high input-output voltages 15 www.national.com LM117/LM317A/LM317 Typical Applications (Continued) 5A Constant Voltage/Constant Current Regulator 00906315 †Solid tantalum *Lights in constant current mode 1A Current Regulator High Gain Amplifier 00906316 1.2V–20V Regulator with Minimum Program Current 00906318 00906317 *Minimum load current ) 4 mA www.national.com 16 LM117/LM317A/LM317 Typical Applications (Continued) Low Cost 3A Switching Regulator 00906319 †Solid tantalum *Core — Arnold A-254168-2 60 turns 4A Switching Regulator with Overload Protection 00906320 †Solid tantalum *Core — Arnold A-254168-2 60 turns Precision Current Limiter 00906321 17 www.national.com LM117/LM317A/LM317 Typical Applications (Continued) Tracking Preregulator 00906322 Current Limited Voltage Regulator 00906323 (Compared to LM117’s higher current limit) — At 50 mA output only 3⁄4 volt of drop occurs in R3 and R4 Adjusting Multiple On-Card Regulators with Single Control* 00906324 *All outputs within ± 100 mV †Minimum load — 10 mA www.national.com 18 LM117/LM317A/LM317 Typical Applications (Continued) AC Voltage Regulator 00906325 12V Battery Charger 00906326 Use of RS allows low charging rates with fully charged battery. 50mA Constant Current Battery Charger 00906327 19 www.national.com LM117/LM317A/LM317 Typical Applications (Continued) Adjustable 4A Regulator 00906328 Digitally Selected Outputs Current Limited 6V Charger 00906329 00906302 *Sets peak current (0.6A for 1Ω) *Sets maximum VOUT **The 1000µF is recommended to filter out input transients www.national.com 20 LM117/LM317A/LM317 Physical Dimensions inches (millimeters) unless otherwise noted TO-3 Metal Can Package (K) NS Package Number K02A TO-3 Metal Can Package (K) Mil-Aero Product NS Package Number K02C 21 www.national.com LM117/LM317A/LM317 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) (TO-39) Metal Can Package NS Package Number H03A 3-Lead TO-220 NS Package Number T03B www.national.com 22 LM117/LM317A/LM317 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 3-Lead TO-263 NS Package Number TS3B 23 www.national.com LM117/LM317A/LM317 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Ceramic Leadless Chip Carrier NS Package Number E20A 4-Lead SOT-223 NS Package Number MP04A www.national.com 24 LM117/LM317A/LM317 3-Terminal Adjustable Regulator Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 3-Lead D-Pack NS Package Number TD03B 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 systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 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 CSP-9-111S2. National Semiconductor Americas Customer Support Center Email: [email protected] Tel: 1-800-272-9959 www.national.com National Semiconductor Europe Customer Support Center Fax: +49 (0) 180-530 85 86 Email: [email protected] Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Français Tel: +33 (0) 1 41 91 8790 National Semiconductor Asia Pacific Customer Support Center Email: [email protected] National Semiconductor Japan Customer Support Center Fax: 81-3-5639-7507 Email: [email protected] Tel: 81-3-5639-7560 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.