LM340T-15/NOPB

Order Now Product Folder Technical Documents Support & Community Tools & Software LM340, LM340A, LM7805, LM7812, LM7815 SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 LM340, LM340A and LM7805 Family Wide VIN 1.5-A Fixed Voltage Regulators 1 Features 3 Description • • • The LM340 and LM7805 Family monolithic 3-terminal positive voltage regulators employ internal currentlimiting, thermal shutdown and safe-area compensation, making them essentially indestructible. If adequate heat sinking is provided, they can deliver over 1.5-A output current. They are intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of noise and distribution problems associated with single-point regulation. In addition to use as fixed voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents. 1 • • • • • Output Current up to 1.5 A Available in Fixed 5-V, 12-V, and 15-V Options Output Voltage Tolerances of ±2% at TJ = 25°C (LM340A) Line Regulation of 0.01% / V of at 1-A Load (LM340A) Load Regulation of 0.3% / A (LM340A) Internal Thermal Overload, Short-Circuit and SOA Protection Available in Space-Saving SOT-223 Package Output Capacitance Not Required for Stability Considerable effort was expended to make the entire series of regulators easy to use and minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response. Input bypassing is needed only if the regulator is located far from the filter capacitor of the power supply. 2 Applications • • • • • • • Industrial Power Supplies SMPS Post Regulation HVAC Systems AC Inventors Test and Measurement Equipment Brushed and Brushless DC Motor Drivers Solar Energy String Invertors SPACE LM7805 is also available in a higher accuracy and better performance version (LM340A). Refer to LM340A specifications in the LM340A Electrical Characterisitcs table. Device Information(1) Available Packages PART NUMBER Pin 1. Input 2. Ground 3. Output 2 Tab/Case is Ground or Output LM340x LM7805 Family 1 TO-3 TO-220 1 2 PACKAGE BODY SIZE (NOM) DDPAK/TO-263 (3) 10.18 mm × 8.41 mm SOT-223 (4) 6.50 mm × 3.50 mm TO-220 (3) 14.986 mm × 10.16 mm TO-3 (2) 38.94 mm x 25.40 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. 3 Fixed Output Voltage Regulator TO-263 1 2 3 SOT-223 1 2 3 *Required if the regulator is located far from the power supply filter. **Although no output capacitor is needed for stability, it does help transient response. (If needed, use 0.1-μF, ceramic disc). 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. LM340, LM340A, LM7805, LM7812, LM7815 SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 www.ti.com Table of Contents 1 2 3 4 5 6 7 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 2 3 4 6.1 Absolute Maximum Ratings ...................................... 6.2 ESD Ratings.............................................................. 6.3 Recommended Operating Conditions....................... 6.4 Thermal Information .................................................. 6.5 LM340A Electrical Characteristics, VO = 5 V, VI = 10 V............................................................ 6.6 LM340 / LM7805 Electrical Characteristics, VO = 5 V, VI = 10 V............................................................ 6.7 LM340 / LM7812 Electrical Characteristics, VO = 12 V, VI = 19 V.......................................................... 6.8 LM340 / LM7815 Electrical Characteristics, VO = 15 V, VI = 23 V.......................................................... 6.9 Typical Characteristics .............................................. 4 4 4 4 5 6 7 8 9 Detailed Description ............................................ 12 7.1 Overview ................................................................. 12 7.2 Functional Block Diagram ....................................... 12 7.3 Feature Description................................................. 12 7.4 Device Functional Modes........................................ 12 8 Application and Implementation ........................ 13 8.1 Application Information............................................ 13 8.2 Typical Applications ................................................ 14 8.3 System Examples ................................................... 15 9 Power Supply Recommendations...................... 17 10 Layout................................................................... 17 10.1 Layout Guidelines ................................................. 17 10.2 Layout Example ................................................... 17 10.3 Heat Sinking DDPAK/TO-263 and SOT-223 Package Parts.......................................................... 18 11 Device and Documentation Support ................. 20 11.1 11.2 11.3 11.4 11.5 11.6 11.7 Documentation Support ........................................ Related Links ........................................................ Receiving Notification of Documentation Updates Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 20 20 20 20 20 20 20 12 Mechanical, Packaging, and Orderable Information ........................................................... 21 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision K (November 2015) to Revision L • Page Changed pinout number order for the TO-220 and SOT-223 packages from: 2, 3, 1 to: 1, 2, 3 .......................................... 1 Changes from Revision J (December 2013) to Revision K Page • Added ESD Ratings table, Thermal Information table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section....................................... 1 • Deleted obsolete LM140 and LM7808C devices from the data sheet ................................................................................... 1 • Changed Figure 13 caption from Line Regulation 140AK-5.0 to Line Regulation LM340, .................................................. 11 • Changed Figure 14 caption from Line Regulation 140AK-5.0 to Line Regulation LM340, .................................................. 11 Changes from Revision I (March 2013) to Revision J • 2 Page Changed 0.5 from typ to max ................................................................................................................................................. 5 Submit Documentation Feedback Copyright © 2000–2016, Texas Instruments Incorporated Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 LM340, LM340A, LM7805, LM7812, LM7815 www.ti.com SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 5 Pin Configuration and Functions LM7805 and LM7812 KTT Package 3-Pin DDPAK/TO-263 Top View LM7805 DCY Package 4-Pin SOT-223 Side View LM340K-5.0 NDS Package 2-Pin TO-3 Top View LM7805, LM7812, and LM7815 NDE Package 3-Pin TO-220 Top View Pin Functions PIN I/O DESCRIPTION NAME NO. INPUT 1 I GND 2 I/O Ground pin OUTPUT 3 O Output voltage pin Input voltage pin Copyright © 2000–2016, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 3 LM340, LM340A, LM7805, LM7812, LM7815 SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) (2) MIN DC input voltage Internal power dissipation (3) Lead temperature (soldering, 10 sec.) TO-3 package (NDS) Lead temperature 1,6 mm (1/16 in) from case for 10 s −65 Storage temperature (2) (3) UNIT 35 V Internally Limited Maximum junction temperature (1) MAX 150 °C 300 °C 230 °C 150 °C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and specifications. The maximum allowable power dissipation at any ambient temperature is a function of the maximum junction temperature for operation (TJMAX = 125°C or 150°C), the junction-to-ambient thermal resistance (θJA), and the ambient temperature (TA). PDMAX = (TJMAX − TA)/θJA. If this dissipation is exceeded, the die temperature rises above TJMAX and the electrical specifications do not apply. If the die temperature rises above 150°C, the device goes into thermal shutdown. For the TO-3 package (NDS), the junction-to-ambient thermal resistance (θJA) is 39°C/W. When using a heat sink, θJA is the sum of the 4°C/W junction-to-case thermal resistance (θJC) of the TO-3 package and the case-to-ambient thermal resistance of the heat sink. For the TO-220 package (NDE), θJA is 54°C/W and θJC is 4°C/W. If SOT-223 is used, the junction-to-ambient thermal resistance is 174°C/W and can be reduced by a heat sink (see Applications Hints on heat sinking).If the DDPAK\TO-263 package is used, the thermal resistance can be reduced by increasing the PCB 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 inches of copper area, θJA is 32°C/W. 6.2 ESD Ratings V(ESD) (1) Electrostatic discharge Human-body model (HBM) (1) VALUE UNIT ±2000 V ESD rating is based on the human-body model, 100 pF discharged through 1.5 kΩ. 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) Temperature (TA) MIN MAX UNIT 0 125 °C LM340A, LM340 6.4 Thermal Information LM340, LM7805 Family THERMAL METRIC (1) RθJA KTT (DDPAK/TO-263) DCY (SOT-223) NDS (TO-3) 3 PINS 3 PINS 4 PINS 2 PINS UNIT 23.9 44.8 62.1 39 °C/W RθJC(top) Junction-to-case (top) thermal resistance 16.7 45.6 44 2 °C/W RθJB Junction-to-board thermal resistance 5.3 24.4 10.7 — °C/W ψJT Junction-to-top characterization parameter 3.2 11.2 2.7 — °C/W ψJB Junction-to-board characterization parameter 5.3 23.4 10.6 — °C/W RθJC(bot) Junction-to-case (bottom) thermal resistance 1.7 1.5 — — °C/W (1) 4 Junction-to-ambient thermal resistance NDE (TO-220) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report. Submit Documentation Feedback Copyright © 2000–2016, Texas Instruments Incorporated Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 LM340, LM340A, LM7805, LM7812, LM7815 www.ti.com SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 6.5 LM340A Electrical Characteristics, VO = 5 V, VI = 10 V IOUT = 1 A, 0°C ≤ TJ ≤ 125°C (LM340A) unless otherwise specified (1) PARAMETER VO TEST CONDITIONS Output voltage MIN TYP MAX TJ = 25°C 4.9 5 5.1 PD ≤ 15 W, 5 mA ≤ IO ≤ 1 A 4.8 UNIT V 5.2 V 7.5 V ≤ VIN ≤ 20 V 7.5 V ≤ VIN ≤ 20 V ΔVO Line regulation 8 V ≤ VIN ≤ 12 V ΔVO TJ = 25°C Load regulation TJ = 25°C 3 Over temperature, IO = 500 mA TJ = 25°C Over temperature 5 mA ≤ IO ≤ 1.5 A 10 250 mA ≤ IO ≤ 750 mA Over temperature, 5 mA ≤ IO ≤ 1 A IQ TJ = 25°C Quiescent current 10 mV 10 mV 4 mV 12 mV 25 mV 15 mV 25 mV 6 mA Over temperature 6.5 mA TJ = 25°C, IO = 1 A 0.8 7.5 V ≤ VIN ≤ 20 V ΔIQ Quiescent current change Over temperature, 5 mA ≤ IO ≤ 1 A 0.5 Over temperature, IO = 500 mA 0.8 8 V ≤ VIN ≤ 25 V VN TA = 25°C, 10 Hz ≤ f ≤ 100 kHz Output noise voltage f = 120 Hz 8 V ≤ VIN ≤ 18 Over temperature, IO = 500 mA V Ripple rejection RO VIN (1) TJ = 25°C, , IO = 1 A 68 mA mA mA 40 μV 80 dB 68 dB Dropout voltage TJ = 25°C, IO = 1 A 2 V Output resistance f = 1 kHz 8 mΩ Short-circuit current TJ = 25°C 2.1 Peak output current TJ = 25°C 2.4 Average TC of VO Min, TJ = 0°C, IO = 5 mA Input voltage required to maintain line regulation TJ = 25°C −0.6 A A mV/°C 7.5 V All characteristics are measured with a 0.22-μF capacitor from input to ground and a 0.1-μF capacitor from output to ground. All characteristics except noise voltage and ripple rejection ratio are measured using pulse techniques (tw ≤ 10 ms, duty cycle ≤ 5%). Output voltage changes due to changes in internal temperature must be taken into account separately. Copyright © 2000–2016, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 5 LM340, LM340A, LM7805, LM7812, LM7815 SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 www.ti.com 6.6 LM340 / LM7805 Electrical Characteristics, VO = 5 V, VI = 10 V 0°C ≤ TJ ≤ 125°C unless otherwise specified (1) PARAMETER VO TEST CONDITIONS Output voltage MIN TYP MAX TJ = 25°C, 5 mA ≤ IO ≤ 1 A 4.8 5 5.2 PD ≤ 15 W, 5 mA ≤ IO ≤ 1 A 4.75 UNIT V 5.25 V 7.5 V ≤ VIN ≤ 20 V TJ = 25°C IO = 500 mA ΔVO 3 50 7V ≤ VIN ≤ 25V Over temperature 50 8V ≤ VIN ≤ 20V Line regulation TJ = 25°C IO ≤ 1 A 50 7.5V ≤ VIN ≤ 20V Over temperature 25 8V ≤ VIN ≤ 12V ΔVO TJ = 25°C Load regulation 5 mA ≤ IO ≤ 1.5 A 10 250 mA ≤ IO ≤ 750 mA Over temperature, 5 mA ≤ IO ≤ 1 A IQ IO ≤ 1 A Quiescent current TJ = 25°C Over temperature 0°C ≤ TJ ≤ 125°C, 5 mA ≤ IO ≤ 1 A ΔIQ VN Quiescent current change f = 120 Hz VIN (1) 6 mV 50 mV 8 mA 8.5 mA mA Over temperature, IO ≤ 500 mA 1 Over temperature, IO ≤ 500 8 V ≤ VIN ≤ 18 V mA mV 25 1 62 mV mV TJ = 25°C, IO ≤ 1 A TJ = 25°C, IO ≤ 1 A mV 50 0.5 TA = 25°C, 10 Hz ≤ f ≤ 100 kHz Output noise voltage Ripple rejection RO 7 V ≤ VIN ≤ 20 V mV mA mA 40 μV 80 dB 62 dB Dropout voltage TJ = 25°C, IO = 1 A 2 V Output resistance f = 1 kHz 8 mΩ Short-circuit current TJ = 25°C 2.1 Peak output current TJ = 25°C 2.4 Average TC of VOUT Over temperature, IO = 5 mA Input voltage required to maintain line regulation TJ = 25°C, IO ≤ 1 A −0.6 A A mV/°C 7.5 V All characteristics are measured with a 0.22-μF capacitor from input to ground and a 0.1-μF capacitor from output to ground. All characteristics except noise voltage and ripple rejection ratio are measured using pulse techniques (tw ≤ 10 ms, duty cycle ≤ 5%). Output voltage changes due to changes in internal temperature must be taken into account separately. Submit Documentation Feedback Copyright © 2000–2016, Texas Instruments Incorporated Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 LM340, LM340A, LM7805, LM7812, LM7815 www.ti.com SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 6.7 LM340 / LM7812 Electrical Characteristics, VO = 12 V, VI = 19 V 0°C ≤ TJ ≤ 125°C unless otherwise specified (1) PARAMETER VO TEST CONDITIONS Output voltage MIN TYP MAX UNIT TJ = 25°C, 5 mA ≤ IO ≤ 1 A 11.5 12 12.5 V PD ≤ 15 W, 5 mA ≤ IO ≤ 1 A 11.4 12.6 V 14.5 V ≤ VIN ≤ 27 V TJ = 25°C IO = 500 mA ΔVO 4 120 mV 14.5V ≤ VIN ≤ 30V Over temperature 120 mV 15V ≤ VIN ≤ 27V Line regulation TJ = 25°C IO ≤ 1 A 120 mV 14.6V ≤ VIN ≤ 27V Over temperature 60 mV 16V ≤ VIN ≤ 22V ΔVO TJ = 25°C Load regulation 5 mA ≤ IO ≤ 1.5 A 12 250 mA ≤ IO ≤ 750 mA Over temperature, 5 mA ≤ IO ≤ 1 A IQ IO ≤ 1 A Quiescent current TJ = 25°C Over temperature 5 mA ≤ IO ≤ 1 A Quiescent current change mV 60 mV 120 mV 8 mA 8.5 mA 0.5 TJ = 25°C, IO ≤ 1 A ΔIQ 120 mA 1 mA 14.8 V ≤ VIN ≤ 27 V Over temperature, IO ≤ 500 mA 1 mA 14.5 V ≤ VIN ≤ 30 V VN Output noise voltage TA = 25°C, 10 Hz ≤ f ≤ 100 kHz f = 120 Hz RO VIN (1) TJ = 25°C, IO ≤ 1 A Ripple rejection 15 V ≤ VIN ≤ 25 Over temperature, IO ≤ 500 mA, V Dropout voltage TJ = 25°C, IO = 1 A Output resistance Short-circuit current 55 75 μV 72 dB 55 dB 2 V f = 1 kHz 18 mΩ TJ = 25°C 1.5 A Peak output current TJ = 25°C 2.4 Average TC of VOUT Over temperature, IO = 5 mA Input voltage required to maintain line regulation TJ = 25°C, IO ≤ 1 A −1.5 A mV/°C 14.6 V All characteristics are measured with a 0.22-μF capacitor from input to ground and a 0.1-μF capacitor from output to ground. All characteristics except noise voltage and ripple rejection ratio are measured using pulse techniques (tw ≤ 10 ms, duty cycle ≤ 5%). Output voltage changes due to changes in internal temperature must be taken into account separately. Copyright © 2000–2016, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 7 LM340, LM340A, LM7805, LM7812, LM7815 SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 www.ti.com 6.8 LM340 / LM7815 Electrical Characteristics, VO = 15 V, VI = 23 V 0°C ≤ TJ ≤ 125°C unless otherwise specified (1) PARAMETER VO TEST CONDITIONS Output voltage MIN TYP MAX UNIT TJ = 25°C, 5 mA ≤ IO ≤ 1 A 14.4 15 15.6 V PD ≤ 15 W, 5 mA ≤ IO ≤ 1 A 14.25 15.75 V 17.5 V ≤ VIN ≤ 30 V TJ = 25°C IO = 500 mA ΔVO 4 150 17.5 V ≤ VIN ≤ 30 V Over temperature 150 18.5 V ≤ VIN ≤ 30 V Line regulation TJ = 25°C IO ≤ 1 A 150 17.7 V ≤ VIN ≤ 30 V Over temperature 75 20 V ≤ VIN ≤ 26 V ΔVO TJ = 25°C Load regulation 5 mA ≤ IO ≤ 1.5 A 12 250 mA ≤ IO ≤ 750 mA Over temperature, 5 mA ≤ IO ≤ 1 A, IQ IO ≤ 1 A Quiescent current TJ = 25°C Over temperature 5 mA ≤ IO ≤ 1 A ΔIQ Quiescent current change VN f = 120 Hz RO VIN (1) 8 75 mV mV 8 mA 8.5 mA mA 1 TA = 25°C, 10 Hz ≤ f ≤ 100 kHz Output noise voltage TJ = 25°C, IO ≤ 1 A Ripple rejection 18.5 V ≤ VIN ≤ Over temperature, IO ≤ 500 mA, 28.5 V Dropout voltage TJ = 25°C, IO = 1 A Output resistance Short-circuit current 54 mV 150 17.9 V ≤ VIN ≤ 30 V 17.5 V ≤ VIN ≤ 30 V mV mV 1 Over temperature, IO ≤ 500 mA mV 150 0.5 TJ = 25°C, IO ≤ 1 A mV mA mA 90 μV 70 dB 54 dB 2 V f = 1 kHz 19 mΩ TJ = 25°C 1.2 A Peak output current TJ = 25°C 2.4 Average TC of VOUT Over temperature, IO = 5 mA Input voltage required to maintain line regulation TJ = 25°C, IO ≤ 1 A −1.8 A mV/°C 17.7 V All characteristics are measured with a 0.22-μF capacitor from input to ground and a 0.1-μF capacitor from output to ground. All characteristics except noise voltage and ripple rejection ratio are measured using pulse techniques (tw ≤ 10 ms, duty cycle ≤ 5%). Output voltage changes due to changes in internal temperature must be taken into account separately. Submit Documentation Feedback Copyright © 2000–2016, Texas Instruments Incorporated Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 LM340, LM340A, LM7805, LM7812, LM7815 www.ti.com SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 6.9 Typical Characteristics Figure 1. Maximum Average Power Dissipation Figure 3. Maximum Power Dissipation (DDPAK/TO-263) Figure 5. Ripple Rejection Copyright © 2000–2016, Texas Instruments Incorporated Figure 2. Maximum Average Power Dissipation Shaded area refers to LM340A/LM340, LM7805, LM7812 and LM7815. Figure 4. Output Voltage (Normalized to 1 V at TJ = 25°C) Figure 6. Ripple Rejection Submit Documentation Feedback Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 9 LM340, LM340A, LM7805, LM7812, LM7815 SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 www.ti.com Typical Characteristics (continued) Figure 7. Output Impedance Figure 8. Dropout Characteristics Shaded area refers to LM340A/LM340, LM7805, LM7812, and LM7815. Figure 9. Quiescent Current Figure 10. Peak Output Current Shaded area refers to LM340A/LM340, LM7805, LM7812, and LM7815. Figure 11. Dropout Voltage Figure 12. Quiescent Current 10 Submit Documentation Feedback Copyright © 2000–2016, Texas Instruments Incorporated Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 LM340, LM340A, LM7805, LM7812, LM7815 www.ti.com SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 Typical Characteristics (continued) IOUT = 1 A, TA = 25°C Figure 13. Line Regulation LM340 Copyright © 2000–2016, Texas Instruments Incorporated VIN = 10 V, TA = 25°C Figure 14. Line Regulation LM340 Submit Documentation Feedback Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 11 LM340, LM340A, LM7805, LM7812, LM7815 SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 www.ti.com 7 Detailed Description 7.1 Overview The LM340 and LM7805 devices are a family of fixed output positive voltage regulators with outputs ranging from 3 V to 15 V. They accept up to 35 V of input voltage and with proper heat dissipation can provide over 1.5 A of current. With a combination of current limiting, thermal shutdown, and safe area protection, these regulators eliminate any concern of damage. These features paired with excellent line and load regulation make the LM340 and LM7805 Family versatile solutions to a wide range of power management designs. Although the LM340 and LM7805 Family were designed primarily as fixed-voltage regulators, these devices can be used with external component for adjustable voltage and current. 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Output Current With proper considerations, the LM340 and LM7805 Family can exceed 1.5-A output current. Depending on the desired package option, the effective junction-to-ambient thermal resistance can be reduced through heat sinking, allowing more power to be dissipated in the device. 7.3.2 Current Limiting Feature In the event of a short circuit at the output of the regulator, each device has an internal current limit to protect it from damage. The typical current limits for the LM340 and LM7805 Family is 2.4 A. 7.3.3 Thermal Shutdown Each package type employs internal current limiting and thermal shutdown to provide safe operation area protection. If the junction temperature is allowed to rise to 150°C, the device will go into thermal shutdown. 7.4 Device Functional Modes There are no functional modes for this device. 12 Submit Documentation Feedback Copyright © 2000–2016, Texas Instruments Incorporated Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 LM340, LM340A, LM7805, LM7812, LM7815 www.ti.com SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 8 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.1 Application Information The LM340x and LM7805 series is designed with thermal protection, output short-circuit protection, and output transistor safe area protection. However, as with any IC regulator, it becomes necessary to take precautions to assure that the regulator is not inadvertently damaged. The following describes possible misapplications and methods to prevent damage to the regulator. 8.1.1 Shorting the Regulator Input When using large capacitors at the output of these regulators, a protection diode connected input to output (Figure 15) may be required if the input is shorted to ground. Without the protection diode, an input short causes the input to rapidly approach ground potential, while the output remains near the initial VOUT because of the stored charge in the large output capacitor. The capacitor will then discharge through a large internal input to output diode and parasitic transistors. If the energy released by the capacitor is large enough, this diode, low current metal, and the regulator are destroyed. The fast diode in Figure 15 shunts most of the capacitors discharge current around the regulator. Generally no protection diode is required for values of output capacitance ≤ 10 μF. 8.1.2 Raising the Output Voltage Above the Input Voltage Because the output of the device does not sink current, forcing the output high can cause damage to internal low current paths in a manner similar to that just described in Shorting the Regulator Input. 8.1.3 Regulator Floating Ground When the ground pin alone becomes disconnected, the output approaches the unregulated input, causing possible damage to other circuits connected to VOUT. If ground is reconnected with power ON, damage may also occur to the regulator. This fault is most likely to occur when plugging in regulators or modules with on card regulators into powered up sockets. The power must be turned off first, the thermal limit ceases operating, or the ground must be connected first if power must be left on. See Figure 16. 8.1.4 Transient Voltages If transients exceed the maximum rated input voltage of the device, or reach more than 0.8 V below ground and have sufficient energy, they will damage the regulator. The solution is to use a large input capacitor, a series input breakdown diode, a choke, a transient suppressor or a combination of these. Figure 15. Input Short Copyright © 2000–2016, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 13 LM340, LM340A, LM7805, LM7812, LM7815 SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 www.ti.com Application Information (continued) Figure 16. Regulator Floating Ground Figure 17. Transients When a value for θ(H–A) is found, a heat sink must be selected that has a value that is less than or equal to this number. θ(H–A) is specified numerically by the heat sink manufacturer in this catalog or shown in a curve that plots temperature rise vs power dissipation for the heat sink. 8.2 Typical Applications 8.2.1 Fixed Output Voltage Regulator The LM340x and LM7805 Family devices are primarily designed to provide fixed output voltage regulation. The simplest implementation of LM340x and LM7805 Family is shown in Figure 18. *Required if the regulator is located far from the power supply filter. **Although no output capacitor is needed for stability, it does help transient response. (If needed, use 0.1-μF, ceramic disc). Figure 18. Fixed Output Voltage Regulator 8.2.1.1 Design Requirements The device component count is very minimal. Although not required, TI recommends employing bypass capacitors at the output for optimum stability and transient response. These capacitors must be placed as close as possible to the regulator. If the device is located more than 6 inches from the power supply filter, it is required to employ input capacitor. 14 Submit Documentation Feedback Copyright © 2000–2016, Texas Instruments Incorporated Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 LM340, LM340A, LM7805, LM7812, LM7815 www.ti.com SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 Typical Applications (continued) 8.2.1.2 Detailed Design Procedure The output voltage is set based on the device variant. LM340x and LM7805 Family are available in 5-V, 12-V and 15-V regulator options. 8.2.1.3 Application Curve Figure 19. VOUT vs VIN, VOUT = 5 V 8.3 System Examples IOUT = V2–3 / R1 + IQ ΔIQ = 1.3 mA over line and load changes. VOUT = 5 V + (5 V/R1 + IQ) R2 5 V/R1 > 3 IQ, load regulation (Lr) ≈ [(R1 + R2)/R1] (Lr of LM340-5). Figure 20. Current Regulator INPUT Figure 21. Adjustable Output Regulator OUTPUT VI VO 0.22 PF GND VI INPUT 0.1 PF Copyright © 2000–2016, Texas Instruments Incorporated VO GND 0.22 PF Figure 22. High Input Voltage Circuit With Series Resistor OUTPUT 0.1 PF Figure 23. High Input Voltage Circuit implementation With Transistor Submit Documentation Feedback Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 15 LM340, LM340A, LM7805, LM7812, LM7815 SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 www.ti.com System Examples (continued) RSC Q1 2N6133 IQ1 Q1 2N6132 IN VI R1 3.0: Q2 2N6124 IREG IO MAX OUTPUT VO INPUT 0.22 PF INPUT OUT GND OUTPUT R1 3.0: 0.1 PF β(Q1) ≥ IO Max / IREG Max R1 = 0.9 / IREG = β(Q1) VBE(Q1) / IREG Max (β +1) – IO Max 0.22 PF GND 0.1 PF RSC = 0.8 / ISC R1 = βVBE(Q1) / IREG Max (β +1) – IO Max Figure 24. High Current Voltage Regulator Figure 25. High Output Current With Short-Circuit Protection INPUT OUTPUT + OUT LM340 + + 0.1 PF GND INPUT OUTPUT LM79xx + + GND 0.1 PF - OUT Figure 26. LM340 Used With Negative Regulator LM79xx 16 Submit Documentation Feedback Copyright © 2000–2016, Texas Instruments Incorporated Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 LM340, LM340A, LM7805, LM7812, LM7815 www.ti.com SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 9 Power Supply Recommendations The LM340 is designed to operate from a wide input voltage up to 35 V. Please refer to electrical characteristics tables for the minimum input voltage required for line/load regulation. If the device is more than six inches from the input filter capacitors, an input bypass capacitor, 0.1 μF or greater, of any type is needed for stability. 10 Layout 10.1 Layout Guidelines Some layout guidelines must be followed to ensure proper regulation of the output voltage with minimum noise. Traces carrying the load current must be wide to reduce the amount of parasitic trace inductance. To improve PSRR, a bypass capacitor can be placed at the OUTPUT pin and must be placed as close as possible to the IC. All that is required for the typical fixed output regulator application circuit is the LM340x/LM7805 Family IC and a 0.22-µF input capacitor if the regulator is placed far from the power supply filter. A 0.1-µF output capacitor is recommended to help with transient response. In cases when VIN shorts to ground, an external diode must be placed from VOUT to VIN to divert the surge current from the output capacitor and protect the IC. 10.2 Layout Example Figure 27. Layout Example DDPAK Copyright © 2000–2016, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 17 LM340, LM340A, LM7805, LM7812, LM7815 SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 www.ti.com Layout Example (continued) Figure 28. Layout Example SOT-223 10.3 Heat Sinking DDPAK/TO-263 and SOT-223 Package Parts Both the DDPAK/TO-263 (KTT) and SOT-223 (DCY) packages use a copper plane on the PCB and the PCB itself as a heat sink. To optimize the heat sinking ability of the plane and PCB, solder the tab of the plane. Figure 29 shows for the DDPAK/TO-263 the measured values of θ(J–A) for different copper area sizes using a typical PCB with 1-oz copper and no solder mask over the copper area used for heat sinking. Figure 29. θ(J–A) vs Copper (1 Ounce) Area for the DDPAK/TO-263 Package 18 Submit Documentation Feedback Copyright © 2000–2016, Texas Instruments Incorporated Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 LM340, LM340A, LM7805, LM7812, LM7815 www.ti.com SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 Heat Sinking DDPAK/TO-263 and SOT-223 Package Parts (continued) As shown in Figure 29, 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 DDPAK/TO-263 package mounted to a PCB is 32°C/W. As a design aid, Figure 30 shows the maximum allowable power dissipation compared to ambient temperature for the DDPAK/TO-263 device (assuming θ(J–A) is 35°C/W and the maximum junction temperature is 125°C). Figure 30. Maximum Power Dissipation vs TAMB for the DDPAK/TO-263 Package Figure 31 and Figure 32 show the information for the SOT-223 package. Figure 31 assumes a θ(J–A) of 74°C/W for 1-oz. copper and 51°C/W for 2-oz. copper and a maximum junction temperature of 125°C. Figure 31. θ(J–A) vs Copper (2 Ounce) Area for the SOT-223 Package Figure 32. Maximum Power Dissipation vs TAMB for the SOT-223 Package See AN-1028 LMX2370 PLLatinum Dual Freq Synth for RF Pers Comm LMX2370 2.5GHz/1.2GHz (SNVA036) for power enhancement techniques to be used with the SOT-223 package. Copyright © 2000–2016, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 19 LM340, LM340A, LM7805, LM7812, LM7815 SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 www.ti.com 11 Device and Documentation Support 11.1 Documentation Support 11.1.1 Related Documentation For related documentation, see the following: • AN-1028 LMX2370 PLLatinum Dual Freq Synth for RF Pers Comm LMX2370 2.5GHz/1.2GHz (SNVA036) • LM140K Series 3-Terminal Positive Regulators (SNVS994) 11.2 Related Links The table below lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy. Table 1. Related Links PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY LM340 Click here Click here Click here Click here Click here LM340A Click here Click here Click here Click here Click here LM7805 Click here Click here Click here Click here Click here LM7812 Click here Click here Click here Click here Click here LM7815 Click here Click here Click here Click here Click here 11.3 Receiving Notification of Documentation Updates To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper right corner, click on Alert me to register and receive a weekly digest of any product information that has changed. For change details, review the revision history included in any revised document. 11.4 Community Resources The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support. 11.5 Trademarks E2E is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. 11.6 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 11.7 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 20 Submit Documentation Feedback Copyright © 2000–2016, Texas Instruments Incorporated Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 LM340, LM340A, LM7805, LM7812, LM7815 www.ti.com SNOSBT0L – FEBRUARY 2000 – REVISED SEPTEMBER 2016 12 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. Copyright © 2000–2016, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: LM340 LM340A LM7805 LM7812 LM7815 21 PACKAGE OPTION ADDENDUM www.ti.com 28-Apr-2022 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) LM340AT-5.0 NRND TO-220 NDE 3 45 Non-RoHS & Green Call TI Level-1-NA-UNLIM 0 to 70 LM340AT 5.0 P+ LM340AT-5.0/NOPB ACTIVE TO-220 NDE 3 45 RoHS-Exempt & Green SN Level-1-NA-UNLIM 0 to 125 LM340AT 5.0 P+ LM340K-5.0 ACTIVE TO-3 NDS 2 50 Non-RoHS & Non-Green Call TI Call TI 0 to 125 LM340K -5.0 7805P+ LM340K-5.0/NOPB ACTIVE TO-3 NDS 2 50 RoHS & Green Call TI Level-1-NA-UNLIM 0 to 125 LM340K -5.0 7805P+ LM340MP-5.0 NRND SOT-223 DCY 4 1000 Non-RoHS & Green Call TI Level-1-260C-UNLIM 0 to 70 N00A LM340MP-5.0/NOPB ACTIVE SOT-223 DCY 4 1000 RoHS & Green SN Level-1-260C-UNLIM 0 to 125 N00A LM340MPX-5.0/NOPB ACTIVE SOT-223 DCY 4 2000 RoHS & Green SN Level-1-260C-UNLIM 0 to 125 N00A LM340S-12/NOPB ACTIVE DDPAK/ TO-263 KTT 3 45 RoHS-Exempt & Green SN Level-3-245C-168 HR 0 to 125 LM340S -12 P+ LM340S-5.0 NRND DDPAK/ TO-263 KTT 3 45 Non-RoHS & Green Call TI Level-3-235C-168 HR 0 to 70 LM340S -5.0 P+ LM340S-5.0/NOPB ACTIVE DDPAK/ TO-263 KTT 3 45 RoHS-Exempt & Green SN Level-3-245C-168 HR 0 to 125 LM340S -5.0 P+ LM340SX-12/NOPB ACTIVE DDPAK/ TO-263 KTT 3 500 RoHS-Exempt & Green SN Level-3-245C-168 HR 0 to 125 LM340S -12 P+ LM340SX-5.0 NRND DDPAK/ TO-263 KTT 3 500 Non-RoHS & Green Call TI Level-3-235C-168 HR 0 to 70 LM340S -5.0 P+ LM340SX-5.0/NOPB ACTIVE DDPAK/ TO-263 KTT 3 500 RoHS-Exempt & Green SN Level-3-245C-168 HR 0 to 125 LM340S -5.0 P+ LM340T-12 NRND TO-220 NDE 3 45 Non-RoHS & Green Call TI Level-1-NA-UNLIM 0 to 70 LM340T12 7812 P+ LM340T-12/NOPB ACTIVE TO-220 NDE 3 45 RoHS & Green SN Level-1-NA-UNLIM LM340T-15 NRND TO-220 NDE 3 45 Non-RoHS & Green Call TI Level-1-NA-UNLIM 0 to 70 LM340T15 7815 P+ LM340T-15/NOPB ACTIVE TO-220 NDE 3 45 RoHS & Green SN Level-1-NA-UNLIM 0 to 125 LM340T15 7815 P+ Addendum-Page 1 LM340T12 7812 P+ Samples PACKAGE OPTION ADDENDUM www.ti.com 28-Apr-2022 Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) LM340T-5.0 NRND TO-220 NDE 3 45 Non-RoHS & Green Call TI Level-1-NA-UNLIM 0 to 70 LM340T5 7805 P+ LM340T-5.0/LF01 ACTIVE TO-220 NDG 3 45 RoHS-Exempt & Green SN Level-4-260C-72 HR 0 to 125 LM340T5 7805 P+ LM340T-5.0/NOPB ACTIVE TO-220 NDE 3 45 RoHS-Exempt & Green SN Level-1-NA-UNLIM 0 to 125 LM340T5 7805 P+ LM7805CT NRND TO-220 NDE 3 45 Non-RoHS & Green Call TI Level-1-NA-UNLIM 0 to 125 LM340T5 7805 P+ LM7805CT/NOPB ACTIVE TO-220 NDE 3 45 RoHS-Exempt & Green SN Level-1-NA-UNLIM 0 to 125 LM340T5 7805 P+ LM7805MP/NOPB ACTIVE SOT-223 DCY 4 1000 RoHS & Green SN Level-1-260C-UNLIM 0 to 125 N00A LM7805MPX/NOPB ACTIVE SOT-223 DCY 4 2000 RoHS & Green SN Level-1-260C-UNLIM 0 to 125 N00A LM7805S/NOPB ACTIVE DDPAK/ TO-263 KTT 3 45 RoHS-Exempt & Green SN Level-3-245C-168 HR 0 to 125 LM340S -5.0 P+ LM7805SX/NOPB ACTIVE DDPAK/ TO-263 KTT 3 500 RoHS-Exempt & Green SN Level-3-245C-168 HR 0 to 125 LM340S -5.0 P+ LM7812CT/NOPB ACTIVE TO-220 NDE 3 45 RoHS & Green SN Level-1-NA-UNLIM -40 to 125 LM7812S/NOPB ACTIVE DDPAK/ TO-263 KTT 3 45 RoHS-Exempt & Green SN Level-3-245C-168 HR 0 to 125 LM340S -12 P+ LM7812SX/NOPB ACTIVE DDPAK/ TO-263 KTT 3 500 RoHS-Exempt & Green SN Level-3-245C-168 HR 0 to 125 LM340S -12 P+ LM7815CT/NOPB ACTIVE TO-220 NDE 3 45 RoHS & Green SN Level-1-NA-UNLIM 0 to 125 LM340T15 7815 P+ LM340T12 7812 P+ (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". Addendum-Page 2 Samples PACKAGE OPTION ADDENDUM www.ti.com 28-Apr-2022 RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of