LM317AT National Semiconductor, LM317AT Datasheet
LM317AT
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LM317AT Summary of contents
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... 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. © 2011 National Semiconductor Corporation LM117/LM317A/LM317 the maximum input to output differential is not exceeded, i.e., avoid short-circuiting the output. ...
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Connection Diagrams TO-3 (K) Metal Can Package CASE IS OUTPUT Bottom View Steel Package NS Package Number K02A or K02C TO-263 (S) Surface-Mount Package Top View TO-263 (S) Surface-Mount Package Side View NS Package Number TS3B www.national.com CASE IS OUTPUT ...
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... J 906359 Order Package Number Marking 1.5A LM117K STEEL LM117K STEEL P+ 1.5A LM317K STEEL LM317K STEEL P+ 1.5A LM117K/883 LM117K/883 1.5A LM317AT LM317AT P+ 1.5A LM317T LM317T P+ LM317S 1.5A LM317S P+ LM317SX LM317EMP 1.0A N01A LM317EMPX LM317AEMP 1.0A N07A LM317AEMPX 0.5A LM117H LM117H P+ ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Dissipation Input-Output Voltage Differential Storage Temperature Lead Temperature Metal Package (Soldering, 10 seconds) Plastic Package (Soldering, 4 seconds) ESD Tolerance (Note 5) LM117 Electrical Characteristics Specifications with standard type face are for T Range ...
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LM317A and LM317 Electrical Characteristics Specifications with standard type face are for T Range. Unless otherwise specified, V Parameter Reference Voltage Line Regulation 3V Load Regulation 10 mA Thermal Regulation 20 ms Pulse Adjustment Pin Current 10 ...
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Typical Performance Characteristics Load Regulation Adjustment Current OUT IN OUT www.national.com Output Capacitor = 0 μF unless otherwise noted 906337 906339 = V REF 906367 6 Current Limit 906338 Dropout Voltage 906340 ...
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Temperature Stability 906341 Ripple Rejection 906343 Ripple Rejection 906345 Minimum Operating Current Ripple Rejection Output Impedance 7 906342 906344 906346 www.national.com ...
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Line Transient Response www.national.com Load Transient Response 906347 8 906348 ...
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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 ...
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D1 protects against C1 D2 protects against C2 FIGURE 3. Regulator with Protection Diodes HEATSINK REQUIREMENTS The LM317 regulators have internal thermal shutdown to pro- ...
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FIGURE 5. θ vs Copper (2 ounce) Area for the (J−A) SOT-223 Package FIGURE 6. Maximum Power Dissipation vs T SOT-223 Package HEATSINKING THE TO-263 PACKAGE shows for the TO-263 the measured values of θ Figure 7 for different copper ...
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Layout Top Side ( Note: * Tab of device attached to topside of copper. www.national.com TABLE 1. θ Different Heatsink Area JA Copper Area ...
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FIGURE 10. Maximum Allowable Power Dissipation vs. Ambient Temperature for TO-252 FIGURE 11. Maximum Allowable Power Dissipation vs. 2oz Copper Area for TO-252 906363 906362 13 www.national.com ...
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FIGURE 12. Top View of the Thermal Test Pattern in Actual Scale www.national.com 906364 14 ...
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FIGURE 13. Bottom View of the Thermal Test Pattern in Actual Scale Schematic Diagram 906365 15 906308 www.national.com ...
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Typical Applications 5V Logic Regulator with Electronic Shutdown* ≊ *Min. output 1.2V Slow Turn-On 15V Regulator Adjustable Regulator with Improved Ripple Rejection www.national.com †Solid tantalum *Discharges C1 if output is shorted to ground High Stability 10V Regulator 906303 906309 906310 ...
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Regulator Full output current not available at high input-output voltages High Current Adjustable Regulator 906313 17 906312 Power Follower 906314 www.national.com ...
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Current Regulator 1.2V–20V Regulator with Minimum Program Current www.national.com 5A Constant Voltage/Constant Current Regulator *Minimum load current 906316 906317 18 906315 ≊ High Gain Amplifier 906318 ...
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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 906321 19 906319 906320 www.national.com ...
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LM117's higher current limit) — output only ¾ volt of drop occurs in R Adjusting Multiple On-Card Regulators with Single Control* *All outputs within ±100 mV †Minimum load—10 mA www.national.com Tracking Preregulator Current Limited Voltage Regulator ...
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Use of R allows low charging rates with fully charged battery Voltage Regulator 12V Battery Charger 50mA Constant Current Battery Charger 906327 21 906325 906326 www.national.com ...
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Current Limited 6V Charger *Sets peak current (0.6A for 1Ω) **The 1000μF is recommended to filter out input transients www.national.com Adjustable 4A Regulator Digitally Selected Outputs 906329 *Sets maximum V OUT 22 906328 906302 ...
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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 23 www.national.com ...
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TO-39 Metal Can Package (H) NS Package Number H03A 3-Lead TO-220 (T) NS Package Number T03B 24 ...
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TO-263 (S) NS Package Number TS3B Ceramic Leadless Chip Carrier (E) NS Package Number E20A 25 www.national.com ...
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SOT-223 (EMP) NS Package Number MP04A 3-Lead D-Pack (MDT) NS Package Number TD03B 26 ...
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Notes 27 www.national.com ...
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