LM317 National Semiconductor, LM317 Datasheet
LM317
Available stocks
Related parts for LM317
LM317 Summary of contents
Page 1
... LM138 series (5A) data sheets. For the negative complement, see LM137 series data sheet. Features n Guaranteed 1% output voltage tolerance (LM317A) n Guaranteed max. 0.01%/V line regulation (LM317A) n Guaranteed max. 0.3% load regulation (LM117) n Guaranteed 1.5A output current n Adjustable output down to 1.2V n Current limit constant with temperature ...
Page 2
Connection Diagrams (TO-3) Metal Can Package CASE IS OUTPUT Bottom View Steel Package NS Package Number K02A or K02C (TO-263) Surface-Mount Package Top View 00906336 Side View NS Package Number TS3B www.national.com CASE IS OUTPUT 00906330 00906335 2 (TO-39) Metal ...
Page 3
... T ≤ +125˚C D- Pack J 3- Lead −40˚C ≤ T ≤ +125˚C J (Continued) 00906359 Part Number Package Marking LM117K STEEL LM117K STEEL P+ LM317K STEEL LM317K STEEL P+ LM117K/883 LM117K/883 LM117H LM117H P+ LM117H/883 LM117H/883 LM317AH LM317AH P+ LM317H LM317H P+ LM317AT LM317AT P+ LM317T LM317T P+ ...
Page 4
... Heat Sink) www.national.com (Note 1) ESD Tolerance (Note 5) Operating Temperature Range LM117 Internally Limited LM317A +40V, −0.3V LM317 −65˚C to +150˚C 300˚C Thermal Limit Burn-In 260˚C (Note 3) = 25˚C, and those with boldface type apply over full Operating Tempera- J − 5V, and ...
Page 5
... MAX − 40V OUT ) ≤ 15V − V OUT 1.5 0.5 1.5 − 40V OUT 0.15 0.075 0.15 = 10V 120 Hz µF = 10V 120 Hz µF is 50˚C/W; with 1 square inch of copper area, θ LM317A LM317 Typ Max Min Typ Max 1.250 1.262 1.250 1.270 1.20 1.25 1.30 0.005 0.01 0.01 0.04 0.01 0.02 0.02 0.07 0.1 0.5 0.1 0.5 ...
Page 6
Typical Performance Characteristics Load Regulation Adjustment Current Temperature Stability www.national.com Output Capacitor = 0µF unless otherwise noted 00906337 Dropout Voltage 00906339 Minimum Operating Current 00906341 6 Current Limit 00906338 00906340 00906342 ...
Page 7
Typical Performance Characteristics Ripple Rejection Ripple Rejection Line Transient Response Output Capacitor = 0µF unless otherwise noted (Continued) Ripple Rejection 00906343 Output Impedance 00906345 Load Transient Response 00906347 7 00906344 00906346 00906348 www.national.com ...
Page 8
Application Hints In operation, the LM117 develops a nominal 1.25V reference voltage between the output and adjustment terminal. REF The reference voltage is impressed across program resistor R1 and, since the voltage is constant, a constant current I ...
Page 9
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 ...
Page 10
... 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 ...
Page 11
Application Hints (Continued) TABLE 1. θ Layout 0.066 13 0.175 14 0.284 15 0.392 16 0.5 Note: * Tab of device attached to topside of copper. FIGURE 10. Maximum Allowable Power Dissipation vs. Ambient Temperature for TO-252 ...
Page 12
Application Hints (Continued) FIGURE 11. Maximum Allowable Power Dissipation vs. 2oz Copper Area for TO-252 FIGURE 12. Top View of the Thermal Test Pattern in Actual Scale www.national.com 00906362 00906364 12 ...
Page 13
Application Hints (Continued) FIGURE 13. Bottom View of the Thermal Test Pattern in Actual Scale 00906365 13 www.national.com ...
Page 14
Schematic Diagram Typical Applications 5V Logic Regulator with Electronic Shutdown *Min. output ) 1.2V Slow Turn-On 15V Regulator www.national.com Adjustable Regulator with Improved Ripple Rejection * † Solid tantalum *Discharges C1 if output is shorted to ground 00906303 High Stability ...
Page 15
Typical Applications (Continued) ‡ Optional — improves ripple rejection † Solid tantalum *Minimum load current = 30V Regulator Full output current not available at high input-output voltages High Current Adjustable Regulator 00906313 15 00906312 Power Follower ...
Page 16
Typical Applications † Solid tantalum *Lights in constant current mode 1A Current Regulator 1.2V–20V Regulator with Minimum Program Current *Minimum load current ) 4 mA www.national.com (Continued) 5A Constant Voltage/Constant Current Regulator 00906316 00906317 16 00906315 High Gain Amplifier 00906318 ...
Page 17
Typical Applications (Continued) † Solid tantalum *Core — Arnold A-254168-2 60 turns 4A Switching Regulator with Overload Protection † Solid tantalum *Core — Arnold A-254168-2 60 turns Low Cost 3A Switching Regulator Precision Current Limiter 00906321 17 00906319 00906320 www.national.com ...
Page 18
Typical Applications (Compared to LM117’s higher current limit) — output only 3 ⁄ volt of drop occurs Adjusting Multiple On-Card Regulators with Single Control ± *All outputs within 100 mV † Minimum load — ...
Page 19
Typical Applications (Continued) Use of R allows low charging rates with fully charged battery Voltage Regulator 12V Battery Charger 50mA Constant Current Battery Charger 00906327 19 00906325 00906326 www.national.com ...
Page 20
Typical Applications Current Limited 6V Charger *Sets peak current (0.6A for 1Ω) * *The 1000µF is recommended to filter out input transients www.national.com (Continued) Adjustable 4A Regulator 00906329 * Sets maximum V 20 00906328 Digitally Selected Outputs 00906302 OUT ...
Page 21
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 ...
Page 22
Physical Dimensions www.national.com inches (millimeters) unless otherwise noted (Continued) (TO-39) Metal Can Package NS Package Number H03A 3-Lead TO-220 NS Package Number T03B 22 ...
Page 23
Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 3-Lead TO-263 NS Package Number TS3B 23 www.national.com ...
Page 24
Physical Dimensions www.national.com inches (millimeters) unless otherwise noted (Continued) Ceramic Leadless Chip Carrier NS Package Number E20A 4-Lead SOT-223 NS Package Number MP04A 24 ...
Page 25
... 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. ...