LM317 ONSEMI | Alldatasheet
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1.5 A Adjustable Output,
Positive Voltage Regulator The LM317 is an adjustable 3–terminal positive voltage regulator capable of supplying in excess of 1.5 A over an output voltage range of 1.2 V to 37 V . This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. Further, it employs internal current limiting, thermal shutdown and safe area compensation, making it essentially blow–out proof. The LM317 serves a wide variety of applications including local, on card regulation. This device can also be used to make a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the LM317 can be used as a precision current regulator.
- Output Current in Excess of 1.5 A
- Output Adjustable between 1.2 V and 37 V
- Internal Thermal Overload Protection
- Internal Short Circuit Current Limiting Constant with Temperature
- Output Transistor Safe–Area Compensation
- Floating Operation for High V oltage Applications
- Available in Surface Mount D2PAK, and Standard 3–Lead Transistor Package
- Eliminates Stocking many Fixed V oltages Standard Application Cin is required if regulator is located an appreciable distance from power supply filter. CO is not needed for stability, however, it does improve transient response. Since IAdj is controlled to less than 100 µA, the error associated with this term is negligible in most applications. Vout 1.25V1 I AdjR2 LM317 Vin Vout 240 AdjustIAdj Cin* 0.1 µF + CO** 1.0 µF ON Semiconductor Semiconductor Components Industries, LLC, 2002 January, 2002 – Rev. 3
1 Publication Order Number:
THREE–TERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR Device Operating Temperature Range Package T SUFFIX PLASTIC PACKAGE CASE 221A
ORDERING INFORMATION
T J = 0° to +125°C Insertion Mount Surface Mount TJ = –40° to +125°C Pin 1. Adjust 2. V out 3. V in D2T SUFFIX PLASTIC PACKAGE CASE 936 (D2PAK) Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2. 1 2 Heatsink surface connected to Pin 2. LM317
http://onsemi.com MAXIMUM RATINGS Rating Symbol Value Unit Input–Output Voltage Differential VI–VO 40 Vdc Power Dissipation Case 221A TA = +25°C PD Internally LimitedW Thermal Resistance, Junction–to–Ambient θJA 65 °C/W Thermal Resistance, Junction–to–Case θJC 5.0 °C/W Case 936 (D2PAK) TA = +25°C PD Internally LimitedW Thermal Resistance, Junction–to–Ambient θJA 70 °C/W Thermal Resistance, Junction–to–Case θJC 5.0 °C/W Operating Junction Temperature Range TJ –40 to +125 °C Storage Temperature Range Tstg –65 to +150 °C ELECTRICAL CHARACTERISTICS (VI–VO = 5.0 V; IO = 0.5 A for D2T and T packages; TJ = Tlow to Thigh [Note 1]; Imax and Pmax [Note 2]; unless otherwise noted.) Characteristics Figure Symbol Min Typ Max Unit Line Regulation (Note 3), TA = +25°C, 3.0 V ≤ VI–VO ≤ 40 V 1 Reg line – 0.01 0.04 %/V Load Regulation (Note 3), TA = +25°C, 10 mA ≤ IO ≤ Imax VO ≤ 5.0 V VO ≥ 5.0 V
2 Reg load
5.0 0.1 0.5 mV % V O Thermal Regulation, TA = +25°C (Note 6), 20 ms Pulse Reg therm – 0.03 0.07 % V O /W Adjustment Pin Current 3 IAdj – 50 100 µA Adjustment Pin Current Change, 2.5 V ≤ VI–VO ≤ 40 V, 10 mA ≤ IL ≤ Imax , PD ≤ Pmax 1, 2 ΔIAdj – 0.2 5.0 µA Reference Voltage, 3.0 V ≤ VI–VO ≤ 40 V, 10 mA ≤ IO ≤ Imax , PD ≤ Pmax 3 Vref 1.2 1.25 1.3 V Line Regulation (Note 3), 3.0 V ≤ VI–VO ≤ 40 V 1 Reg line – 0.02 0.07 % V Load Regulation (Note 3), 10 mA ≤ IO ≤ Imax VO ≤ 5.0 V VO ≥ 5.0 V 0.3 1.5 mV % V O Temperature Stability (Tlow ≤ TJ ≤ Thigh) 3 TS – 0.7 – % V O Minimum Load Current to Maintain Regulation (VI–VO = 40 V) 3 ILmin – 3.5 10 mA Maximum Output Current VI–VO ≤ 15 V, PD ≤ Pmax, T Package VI–VO = 40 V, PD ≤ Pmax , TA = +25°C, T Package
3 Imax
1.5 0.15 2.2 0.4 A RMS Noise, % of VO , TA = +25°C, 10 Hz ≤ f ≤ 10 kHz N – 0.003 – % V O Ripple Rejection, VO = 10 V, f = 120 Hz (Note 4) Without CAdj C Adj = 10 µF 4 RR dB Long–Term Stability, TJ = Thigh (Note 5), TA = +25°C for Endpoint Measurements Hrs. Thermal Resistance Junction to Case, T Package R θJC – 5.0 – °C/W NOTES: 1. Tlow to Thigh = 0° to +125°C, for LM317T, D2T. Tlow to Thigh = –40° to +125°C, for LM317BT, BD2T. 2. Imax = 1.5 A, Pmax = 20 W 3. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 4. CAdj, when used, is connected between the adjustment pin and ground. 5. Since Long–Term Stability cannot be measured on each device before shipment, this specification is an engineering estimate of average stability from lot to lot. 6. Power dissipation within an IC voltage regulator produces a temperature gradient on the die, affecting individual IC components on the die. These effects can be minimized by proper integrated circuit design and layout techniques. Thermal Regulation is the effect of these temperature gradients on the output voltage and is expressed in percentage of output change per watt of power change in a specified time.
This device contains 29 active transistors. Figure 1. Line Regulation and ΔIAd j/Line Test Circuit
1.25 V reference (V
constant current flows through R2 to ground. is less than this minimum, the output voltage will rise. Figure 17. Basic Circuit Configuration rejection about 15 dB at 120 Hz in a 10 V application. effect and insures stability. discharging through the IC during an output short circuit. discharging through the IC during an input short circuit. Figure 18. Voltage Regulator with Protection Diodes
Figure 19. D2PAK Thermal Resistance and Maximum Figure 20. ‘‘Laboratory’’ Power Supply with Adjustable Current Limit and Output Voltage
32 V to 40 V Vin1
240 D 5
- allow adjustment of output voltage to 0 V.
- D6 protects both LM317’s during an input short circuit.
http://onsemi.com PACKAGE DIMENSIONS T SUFFIX PLASTIC PACKAGE CASE 221A–09 ISSUE AA NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION Z DEFINES A ZONE WHERE ALL BODY AND LEAD IRREGULARITIES ARE ALLOWED. DIM MIN MAX MIN MAX MILLIMETERSINCHES A 0.570 0.620 14.48 15.75 B 0.380 0.405 9.66 10.28 C 0.160 0.190 4.07 4.82 D 0.025 0.035 0.64 0.88 F 0.142 0.147 3.61 3.73 G 0.095 0.105 2.42 2.66 H 0.110 0.155 2.80 3.93 J 0.018 0.025 0.46 0.64 K 0.500 0.562 12.70 14.27 L 0.045 0.060 1.15 1.52 N 0.190 0.210 4.83 5.33 Q 0.100 0.120 2.54 3.04 R 0.080 0.110 2.04 2.79 S 0.045 0.055 1.15 1.39 T 0.235 0.255 5.97 6.47 U 0.000 0.050 0.00 1.27 B Q H Z L V G N A K F 12 3 D SEATING PLANE–T– C ST U R J D2T SUFFIX PLASTIC PACKAGE CASE 936–03 (D2PAK) ISSUE B
5 REF5 REF
A 12 3 K F B J S H 0.010 (0.254) TM D G C E M L P N R V U TERMINAL 4 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. TAB CONTOUR OPTIONAL WITHIN DIMENSIONS A AND K. 4. DIMENSIONS U AND V ESTABLISH A MINIMUM MOUNTING SURFACE FOR TERMINAL 4. 5. DIMENSIONS A AND B DO NOT INCLUDE MOLD FLASH OR GATE PROTRUSIONS. MOLD FLASH AND GATE PROTRUSIONS NOT TO EXCEED 0.025 (0.635) MAXIMUM. DIM A MIN MAX MIN MAX MILLIMETERS 0.386 0.403 9.804 10.236 INCHES B 0.356 0.368 9.042 9.347 C 0.170 0.180 4.318 4.572 D 0.026 0.036 0.660 0.914 E 0.045 0.055 1.143 1.397 F 0.051 REF 1.295 REF G 0.100 BSC 2.540 BSC H 0.539 0.579 13.691 14.707 J 0.125 MAX 3.175 MAX K 0.050 REF 1.270 REF L 0.000 0.010 0.000 0.254 M 0.088 0.102 2.235 2.591 N 0.018 0.026 0.457 0.660 P 0.058 0.078 1.473 1.981 R S 0.116 REF 2.946 REF U 0.200 MIN 5.080 MIN V 0.250 MIN 6.350 MIN OPTIONAL CHAMFER
http://onsemi.com Notes
http://onsemi.com ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. PUBLICATION ORDERING INFORMATION JAPAN : ON Semiconductor, Japan Customer Focus Center 4–32–1 Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan 141–0031 Phone : 81–3–5740–2700 Email: r14525@onsemi.com ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. LM317/D Literature Fulfillment: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone : 303–675–2175 or 800–344–3860 Toll Free USA/Canada Fax: 303–675–2176 or 800–344–3867 Toll Free USA/Canada Email: ONlit@hibbertco.com N. American Technical Support: 800–282–9855 Toll Free USA/Canada