LM317L, NCV317LB 100 mA Adjustable Output, Positive Voltage Regulator The LM317L is an adjustable 3-terminal positive voltage regulator capable of supplying in excess of 100 mA over an output voltage range of 1.2V 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 them essentially blow-out proof. The LM317L 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 LM317L can be used as a precision current regulator. http://onsemi.com LOW CURRENT THREE-TERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR Features •Output Current in Excess of 100 mA •Output Adjustable Between 1.2 V and 37 V •Internal Thermal Overload Protection •Internal Short Circuit Current Limiting •Output Transistor Safe-Area Compensation •Floating Operation for High Voltage Applications •Standard 3-Lead Transistor Package •Eliminates Stocking Many Fixed Voltages •Pb-Free Packages are Available •NCV Prefix for Automotive and Other Applications Requiring Site 8 1 SOIC-8 D SUFFIX CASE 751 and Control Changes 12 Simplified Application LM317L R1 240 1 Vin Vout Vout Adjust N.C. Vout Vout N.C. 2 3 STRAIGHT LEAD BULK PACK 3 BENT LEAD TAPE & REEL AMMO PACK TO-92 Z SUFFIX CASE 29 Pin 1. Adjust 2. Vout 3. Vin Vout Vin Pin 1. 2. 3. 4. 5. 6. 7. 8. IAdj Adjust Cin* 0.1mF + C ** O 1.0mF ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 10 of this data sheet. R2 * 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. ǒ Ǔ R Vout + 1.25V 1 ) 2 ) IAdjR2 R1 Since IAdj is controlled to less than 100 mA, the error associated with this term is negligible in most applications. © Semiconductor Components Industries, LLC, 2008 March, 2008 - Rev. 11 1 Publication Order Number: LM317L/D LM317L, NCV317LB MAXIMUM RATINGS Symbol Value Unit Input-Output Voltage Differential Rating VI-VO 40 Vdc Power Dissipation Case 29 (TO-92) TA = 25°C Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Case PD RqJA RqJC Internally Limited 160 83 W °C/W °C/W Case 751 (SOIC-8) (Note 1) TA = 25°C Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Case PD RqJA RqJC Internally Limited 180 45 W °C/W °C/W Operating Junction Temperature Range TJ -40 to +150 °C Storage Temperature Range Tstg -65 to +150 °C Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 1. SOIC-8 Junction-to-Ambient Thermal Resistance is for minimum recommended pad size. Refer to Figure 24 for Thermal Resistance variation versus pad size. 2. This device series contains ESD protection and exceeds the following tests: Human Body Model, 2000 V per MIL STD 883, Method 3015. Machine Model Method, 200 V. Vin 300 300 300 3.0k 70 300 6.8V 6.8V 350 18k 8.67k 500 130 400 5.1k 200k 6.3V 180 180 2.0k 6.0k 60 10 p 10 F p F Vout 2.4k 12.8k Figure 1. Representative Schematic Diagram http://onsemi.com 2 2.5 50 Adjust LM317L, NCV317LB ELECTRICAL CHARACTERISTICS (VI-VO = 5.0 V; IO = 40 mA; TJ = Tlow to Thigh (Note 3); Imax and Pmax (Note 4); unless otherwise noted.) LM317L, LB, NCV317LB Characteristics Figure Symbol Min Typ Max Unit Line Regulation (Note 5) TA = 25°C, 3.0 V ≤ VI - VO ≤ 40 V 1 Regline - 0.01 0.04 %/V Load Regulation (Note 5), TA = 25°C 10 mA ≤ IO ≤ Imax - LM317L VO ≤ 5.0 V VO ≥ 5.0 V 2 Regload - 5.0 0.1 25 0.5 mV % VO Adjustment Pin Current 3 IAdj - 50 100 mA Adjustment Pin Current Change 2.5 V ≤ VI - VO ≤ 40 V, PD ≤ Pmax 10 mA ≤ IO ≤ Imax - LM317L 1, 2 DIAdj - 0.2 5.0 mA Reference Voltage 3.0 V ≤ VI - VO ≤ 40 V, PD ≤ Pmax 10 mA ≤ IO ≤ Imax - LM317L 3 Vref 1.20 1.25 1.30 V Line Regulation (Note 5), 3.0 V ≤ VI - VO ≤ 40 V 1 Regline - 0.02 0.07 %/V Load Regulation (Note 5) 10 mA ≤ IO ≤ Imax - LM317L VO ≤ 5.0 V VO ≥ 5.0 V 2 Regload - 20 0.3 70 1.5 mV % VO Temperature Stability (Tlow ≤ TJ ≤ Thigh) 3 TS - 0.7 - % VO Minimum Load Current to Maintain Regulation (VI - VO = 40 V) 3 ILmin - 3.5 10 mA Maximum Output Current VI - VO ≤ 6.25 V, PD ≤ Pmax, Z Package VI - VO ≤ 40 V, PD ≤ Pmax, TA = 25°C, Z Package 3 Imax 100 - 200 20 - RMS Noise, % of VO TA = 25°C, 10 Hz ≤ f ≤ 10 kHz - N - 0.003 - Ripple Rejection (Note 6) VO = 1.2 V, f = 120 Hz CAdj = 10 mF, VO = 10.0 V 4 RR 60 - 80 80 - Thermal Shutdown (Note 7) - - - 180 - °C Long Term Stability, TJ = Thigh (Note 8) TA = 25°C for Endpoint Measurements 3 S - 0.3 1.0 %/1.0 k Hrs. 3. 4. 5. mA % VO dB Tlow to Thigh = 0° to +125°C for LM317L -40° to +125°C for LM317LB, NCV317LB Imax = 100 mAPmax = 625 mW 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. 6. CAdj, when used, is connected between the adjustment pin and ground. 7. Thermal characteristics are not subject to production test. 8. 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. http://onsemi.com 3 LM317L, NCV317LB VCC VOH - VOL VOL Line Regulation (%/V) = * x 100 VIH VIL VOH VOL Vout Vin LM317L Adjust Cin 0.1mF 240 1% R1 RL + CO IAdj 1mF R2 1 % *Pulse Testing Required: 1% Duty Cycle is suggested. Figure 2. Line Regulation and DIAdj/Line Test Circuit Load Regulation (mV) = VO (min Load) -VO (max Load) VO (min Load) - VO (max Load) Load Regulation (% VO) = VO (min Load) Vin* Vin LM317L Vout Adjust X 100 IL R1 RL (max Load) 240 1% * + Cin 0.1mF VO (min Load) VO (max Load) CO IAdj RL (min Load) 1.0mF R2 1% *Pulse Testing Required: 1% Duty Cycle is suggested. Figure 3. Load Regulation and DIAdj/Load Test Circuit Vin Vout Adjust R1 IAdj VI Cin IL LM317L 240 1% Vref CO 0.1mF ISET Pulse Testing Required: 1% Duty Cycle is suggested. RL + To Calculate R2: Vout = ISET R2 + 1.250 V Assume ISET = 5.25 mA R2 1% Figure 4. Standard Test Circuit http://onsemi.com 4 1mF VO LM317L, NCV317LB 14.30V Vout Vin 4.30V f = 120 Hz Vout = 1.25 V LM317L Adjust Cin D1 * 1N4002 240 1% R1 RL + CO 0.1mF R2 VO 1mF + 1.65K 1% 10mF ** *D1 Discharges CAdj if Output is Shorted to Ground. **CAdj provides an AC ground to the adjust pin. 0.4 Vin = 45 V Vout = 5.0 V IL = 5.0 mA to 40 mA 0.2 RR, RIPPLE REJECTION (dB) Δ V out, OUTPUT VOLTAGE CHANGE (%) Figure 5. Ripple Rejection Test Circuit 0 -0.2 Vin = 10 V Vout = 5.0 V IL = 5.0 mA to 100 mA -0.4 -0.6 -0.8 80 70 IL = 40 mA f = 120 Hz Vout = 10 V Vin = 14 V to 24 V 60 50 -1.0 -50 -25 0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (°C) -50 150 -25 Figure 6. Load Regulation V in -Vout , INPUT-OUTPUT VOLTAGE DIFFERENTIAL (V) 2.5 TJ = 25°C IO, OUTPUT CURRENT (A) 150 Figure 7. Ripple Rejection 0.50 0.40 0.30 0.20 TJ = 150°C 0.10 0 0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (°C) 0 10 20 30 40 Vin-Vout, INPUT-OUTPUT VOLTAGE DIFFERENTIAL (V) 2.0 IL = 100 mA 1.5 IL = 5.0 mA 1.0 0.5 50 Figure 8. Current Limit -50 -25 0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (°C) Figure 9. Dropout Voltage http://onsemi.com 5 150 LM317L, NCV317LB 100 4.5 90 RR, RIPPLE REJECTION (dB) IB , QUIESCENT CURRENT (mA) 5.0 TJ = 55°C TJ = 25°C TJ = 150°C 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 IL = 40 mA Vin = 5.0 V ± 1.0 VPP Vout = 1.25 V 80 70 60 50 40 30 20 10 0 10 10 20 30 40 Vin-Vout, INPUT-OUTPUT VOLTAGE DIFFERENTIAL (V) Figure 10. Minimum Operating Current IAdj, ADJUSTMENT PIN CURRENT ( μA) V ref , REFERENCE VOLTAGE (V) 10 k 100 k 1.0 M f, FREQUENCY (Hz) 80 1.250 1.240 Vin = 4.2 V Vout = Vref IL = 5.0 mA 1.230 -50 -25 0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (°C) 65 60 55 50 45 40 35 150 Vin = 6.25 V Vout = Vref IL = 10 mA IL = 100 mA 70 -50 Figure 12. Temperature Stability 0.4 Vin = 4.25 V to 41.25 V Vout = Vref IL = 5 mA 0.2 -25 0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (°C) 150 Figure 13. Adjustment Pin Current NOISE VOLTAGE ( μV) Δ Vout , OUTPUT VOLTAGE CHANGE (%) 1.0 k Figure 11. Ripple Rejection versus Frequency 1.260 1.220 100 0 -0.2 -0.4 -0.6 Bandwidth 100 Hz to 10 kHz 10 8.0 6.0 -0.8 -1.0 4.0 -50 -25 0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (°C) 150 -50 Figure 14. Line Regulation -25 0 25 50 75 100 125 TJ, JUNCTION TEMPERATURE (°C) Figure 15. Output Noise http://onsemi.com 6 150 Δ Vout , OUTPUT VOLTAGE DEVIATION (V) 1.5 1.0 CL = 1.0 mF; CAdj = 10 mF 0.5 0 ΔV in , INPUT VOTLAGE CHANGE (V) -0.5 Vout = 10 V IL = 50 mA TJ = 25°C -1.0 -1.5 1.0 Vin 0.5 0 0.3 0.2 CL = 1 mF; CAdj = 10 mF 0.1 Vin = 15 V Vout = 10 V INL = 50 mA TJ = 25°C 0 -0.1 CL = 0.3 mF; CAdj = 10 mF -0.2 CL = 0; Without CAdj I L , LOAD CURRENT (mA) ΔVout , OUTPUT VOLTAGE DEVIATION (V) LM317L, NCV317LB -0.3 100 IL 50 0 t, TIME (ms) 20 t, TIME (ms) Figure 16. Line Transient Response Figure 17. Load Transient Response 0 10 20 30 40 0 10 30 40 APPLICATIONS INFORMATION Basic Circuit Operation Load Regulation The LM317L is a 3-terminal floating regulator. In operation, the LM317L develops and maintains a nominal 1.25 V reference (Vref) between its output and adjustment terminals. This reference voltage is converted to a programming current (IPROG) by R1 (see Figure 13), and this constant current flows through R2 to ground. The regulated output voltage is given by: The LM317L is capable of providing extremely good load regulation, but a few precautions are needed to obtain maximum performance. For best performance, the programming resistor (R1) should be connected as close to the regulator as possible to minimize line drops which effectively appear in series with the reference, thereby degrading regulation. The ground end of R2 can be returned near the load ground to provide remote ground sensing and improve load regulation. Vout = Vref (1 + R2 ) + IAdj R2 R1 Since the current from the adjustment terminal (IAdj) represents an error term in the equation, the LM317L was designed to control IAdj to less than 100 mA and keep it constant. To do this, all quiescent operating current is returned to the output terminal. This imposes the requirement for a minimum load current. If the load current is less than this minimum, the output voltage will rise. Since the LM317L is a floating regulator, it is only the voltage differential across the circuit which is important to performance, and operation at high voltages with respect to ground is possible. Vin External Capacitors A 0.1 mF disc or 1.0 mF tantalum input bypass capacitor (Cin) is recommended to reduce the sensitivity to input line impedance. The adjustment terminal may be bypassed to ground to improve ripple rejection. This capacitor (CAdj) prevents ripple from being amplified as the output voltage is increased. A 10mF capacitor should improve ripple rejection about 15 dB at 120 Hz in a 10 V application. Although the LM317L is stable with no output capacitance, like any feedback circuit, certain values of external capacitance can cause excessive ringing. An output capacitance (CO) in the form of a 1.0 mF tantalum or 25 mF aluminum electrolytic capacitor on the output swamps this effect and insures stability. Vout LM317L + R1 Vref Adjust IPROG Vout IAdj R2 Vref = 1.25 V Typical Figure 18. Basic Circuit Configuration http://onsemi.com 7 LM317L, NCV317LB Protection Diodes D1 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. Figure 14 shows the LM317L with the recommended protection diodes for output voltages in excess of 25 V or high capacitance values (CO > 10 mF, CAdj > 5.0 mF). Diode D1 prevents CO from discharging thru the IC during an input short circuit. Diode D2 protects against capacitor CAdj discharging through the IC during an output short circuit. The combination of diodes D1 and D2 prevents CAdj from discharging through the IC during an input short circuit. 1N4002 Vin Vout LM317L + Cin R1 CO D2 Adjust 1N4002 R2 CAdj Figure 19. Voltage Regulator with Protection Diodes +25V Vout LM317L 1.25k Vin Adjust D1 1N4002 D1 1N914 R2 500 * To provide current limiting of IO to the system ground, the source of the current limiting diode must be tied to a negative voltage below - 7.25 V. Vin Vout LM317L D2 1N914 + 1.0mF 120 Adjust MPS2222 1N5314 Vref R2 ≥ IDSS R1 = IO VO R1 TTL Control 720 1.0k VSS* Vref IOmax + IDSS Minimum Vout = 1.25 V VO < POV + 1.25 V + VSS ILmin - IP < IO < 100 mA - IP As shown O < IO < 95 mA D1 protects the device during an input short circuit. Figure 20. Adjustable Current Limiter Figure 21. 5.0 V Electronic Shutdown Regulator R1 Vin Iout R2 LM317L Vout IAdj Adjust Vout Vin LM317L 240 Ioutmax = Vref R1 Ioutmax = Vref R1 + R2 50k Adjust R2 1N4002 MPS2907 + 10mF + IAdj ^ 1.25 V R1 + IAdj ^ 1.25 V R1 + R2 5.0 mA < Iout < 100 mA Figure 22. Slow Turn-On Regulator Figure 23. Current Regulator http://onsemi.com 8 JUNCTION-TO-AIR ( °C/W) R θ JA, THERMAL RESISTANCE 170 3.2 150 2.8 PD(max) for TA = 50°C 2.4 130 110 ÎÎÎ ÎÎÎ ÎÎÎÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎÎ 2.0 Graph represents symmetrical layout 90 L 1.6 2.0 oz. Copper 1.2 70 L 3.0 mm 0.8 50 RθJA 30 0 10 0.4 20 30 40 50 L, LENGTH OF COPPER (mm) Figure 24. SOP-8 Thermal Resistance and Maximum Power Dissipation versus P.C.B. Copper Length http://onsemi.com 9 PD, MAXIMUM POWER DISSIPATION (W) LM317L, NCV317LB LM317L, NCV317LB ORDERING INFORMATION Device Operating Temperature Range LM317LBD Package Shipping† SOIC-8 98 Units / Rail LM317LBDG SOIC-8 (Pb-Free) 98 Units / Rail LM317LBDR2 SOIC-8 2500/Tape & Reel SOIC-8 (Pb-Free) 2500/Tape & Reel TO-92 2000 Units / Bag TO-92 (Pb-Free) 2000 Units / Bag LM317LBDR2G LM317LBZ LM317LBZG LM317LBZRA LM317LBZRAG TJ = -40°C to +125°C TO-92 2000 Tape & Reel TO-92 (Pb-Free) 2000 Tape & Reel LM317LBZRP TO-92 2000 Ammo Pack LM317LBZRPG TO-92 (Pb-Free) 2000 Ammo Pack NCV317LBDG* SOIC-8 (Pb-Free) 98 Units / Rail NCV317LBDR2* SOIC-8 2500/Tape & Reel NCV317LBDR2G* SOIC-8 (Pb-Free) 2500/Tape & Reel NCV317LBZG* TO-92 (Pb-Free) 2000 Units / Bag NCV317LBZRAG* TO-92 (Pb-Free) 2000 Tape & Reel SOIC-8 98 Units / Rail LM317LD LM317LDG SOIC-8 (Pb-Free) 98 Units / Rail LM317LDR2 SOIC-8 2500/Tape & Reel SOIC-8 (Pb-Free) 2500/Tape & Reel TO-92 2000 Units / Bag TO-92 (Pb-Free) 2000 Units / Bag LM317LDR2G LM317LZ LM317LZG LM317LZRA LM317LZRAG TJ = 0°C to +125°C TO-92 2000 Tape & Reel TO-92 (Pb-Free) 2000 Tape & Reel LM317LZRE LM317LZREG TO-92 2000 Tape & Reel TO-92 (Pb-Free) 2000 Tape & Reel TO-92 2000 Ammo Pack TO-92 (Pb-Free) 2000 Ammo Pack TO-92 2000 Ammo Pack TO-92 (Pb-Free) 2000 Ammo Pack LM317LZRM LM317LZRMG LM317LZRP LM317LZRPG †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. * NCV devices: Tlow = -40°C, Thigh = +125°C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and control change. http://onsemi.com 10 LM317L, NCV317LB PACKAGE DIMENSIONS TO-92 (TO-226) Z SUFFIX CASE 29-11 ISSUE AM A B STRAIGHT LEAD BULK PACK R P NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. CONTOUR OF PACKAGE BEYOND DIMENSION R IS UNCONTROLLED. 4. LEAD DIMENSION IS UNCONTROLLED IN P AND BEYOND DIMENSION K MINIMUM. L SEATING PLANE K D X X G J H V C SECTION X-X 1 N DIM A B C D G H J K L N P R V INCHES MIN MAX 0.175 0.205 0.170 0.210 0.125 0.165 0.016 0.021 0.045 0.055 0.095 0.105 0.015 0.020 0.500 --0.250 --0.080 0.105 --0.100 0.115 --0.135 --- MILLIMETERS MIN MAX 4.45 5.20 4.32 5.33 3.18 4.19 0.407 0.533 1.15 1.39 2.42 2.66 0.39 0.50 12.70 --6.35 --2.04 2.66 --2.54 2.93 --3.43 --- N A R BENT LEAD TAPE & REEL AMMO PACK B P NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSION: MILLIMETERS. 3. CONTOUR OF PACKAGE BEYOND DIMENSION R IS UNCONTROLLED. 4. LEAD DIMENSION IS UNCONTROLLED IN P AND BEYOND DIMENSION K MINIMUM. T SEATING PLANE K D X X G J V 1 C SECTION X-X N http://onsemi.com 11 DIM A B C D G J K N P R V MILLIMETERS MIN MAX 4.45 5.20 4.32 5.33 3.18 4.19 0.40 0.54 2.40 2.80 0.39 0.50 12.70 --2.04 2.66 1.50 4.00 2.93 --3.43 --- LM317L, NCV317LB PACKAGE DIMENSIONS SOIC-8 D SUFFIX CASE 751-07 ISSUE AJ NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. 6. 751-01 THRU 751-06 ARE OBSOLETE. NEW STANDARD IS 751-07. -XA 8 5 S B 0.25 (0.010) Y M M 1 4 K -YG C N DIM A B C D G H J K M N S X 45 _ SEATING PLANE -Z- 0.10 (0.004) H M D 0.25 (0.010) M Z Y S X J S MILLIMETERS MIN MAX 4.80 5.00 3.80 4.00 1.35 1.75 0.33 0.51 1.27 BSC 0.10 0.25 0.19 0.25 0.40 1.27 0_ 8_ 0.25 0.50 5.80 6.20 INCHES MIN MAX 0.189 0.197 0.150 0.157 0.053 0.069 0.013 0.020 0.050 BSC 0.004 0.010 0.007 0.010 0.016 0.050 0 _ 8 _ 0.010 0.020 0.228 0.244 SOLDERING FOOTPRINT* 1.52 0.060 7.0 0.275 4.0 0.155 0.6 0.024 1.270 0.050 SCALE 6:1 mm Ǔ ǒinches *For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. 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