LM109,LM309 LM109/LM309 5-Volt Regulator Literature Number: SNVS752A LM109/LM309 5-Volt Regulator General Description The LM109 series are complete 5V regulators fabricated on a single silicon chip. They are designed for local regulation on digital logic cards, eliminating the distribution problems association with single-point regulation. The devices are available in two standard transistor packages. In the solid-kovar TO-5 header, it can deliver output currents in excess of 200 mA, if adequate heat sinking is provided. With the TO-3 power package, the available output current is greater than 1A. The regulators are essentially blowout proof. Current limiting is included to limit the peak output current to a safe value. In addition, thermal shutdown is provided to keep the IC from overheating. If internal dissipation becomes too great, the regulator will shut down to prevent excessive heating. Considerable effort was expended to make these devices easy to use and to minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response somewhat. Input bypassing is needed, however, if the regulator is located very far from the filter capacitor of the power supply. Stability is also achieved by methods that provide very good rejection of load or line transients as are usually seen with TTL logic. Although designed primarily as a fixed-voltage regulator, the output of the LM109 series can be set to voltages above 5V, as shown. It is also possible to use the circuits as the control element in precision regulators, taking advantage of the good current-handling capability and the thermal overload protection. Features n Specified to be compatible, worst case, with TTL and DTL n Output current in excess of 1A n Internal thermal overload protection n No external components required Schematic Diagram DS007138-1 (c) 2001 National Semiconductor Corporation DS007138 www.national.com LM109/LM309 5-Volt Regulator April 1998 LM109/LM309 Absolute Maximum Ratings (Note 1) Operating Junction Temperature Range LM109 LM309 Storage Temperature Range Lead Temperature (Soldering, 10 sec.) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage Power Dissipation 35V Internally Limited -55C to +150C 0C to +125C -65C to +150C 300C Electrical Characteristics (Note 2) Parameter Conditions Output Voltage Tj = 25C Line Regulation Tj = 25C LM109 LM309 Units Min Typ Max Min Typ Max 4.7 5.05 5.3 4.8 5.05 5.2 V 4.0 50 4.0 50 mV 7.10V VIN 25V Load Regulation Tj = 25C TO-39 Package 5 mA IOUT 0.5A 15 50 15 50 mV TO-3 Package 5 mA IOUT 1.5A 15 100 15 100 mV 5.25 V 10 mA Output Voltage 7.40V VIN 25V, 4.6 5.4 4.75 5 mA IOUT IMAX, P < PMAX Quiescent Current Quiescent Current Change Output Noise Voltage 7.40V VIN 25V 5.2 10 5.2 7.40V VIN 25V 0.5 0.5 mA 5 mA IOUT IMAX 0.8 0.8 mA TA = 25C 40 40 V 20 mV 10 Hz f 100 kHz Long Term Stability 10 Ripple Rejection Tj = 25C Thermal Resistance, (Note 3) 50 50 dB Junction to Case TO-39 Package 15 15 C/W TO-3 Package 2.5 2.5 C/W Note 1: "Absolute Maximum Ratings" indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. Note 2: Unless otherwise specified, these specifications apply -55C Tj +150C for the LM109 and 0C Tj +125C for the LM309; VIN = 10V; and IOUT = 0.1A for the TO-39 package or IOUT = 0.5A for the TO-3 package. For the TO-39 package, IMAX = 0.2A and PMAX = 2.0W. For the TO-3 package, IMAX = 1.0A and PMAX = 20W. Note 3: Without a heat sink, the thermal resistance of the TO-39 package is about 150C/W, while that of the TO-3 package is approximately 35C/W. With a heat sink, the effective thermal resistance can only approach the values specified, depending on the efficiency of the sink. Note 4: Refer to RETS109H drawing for LM109H or RETS109K drawing for LM109K military specifications. Connection Diagrams Metal Can Packages DS007138-33 Order Number LM109H, LM109H/883 or LM309H See NS Package Number H03A www.national.com DS007138-34 Order Number LM109K STEEL or LM309K STEEL See NS Package Number K02A Order Number LM109K/883 See NS Package Number K02C 2 1. Bypass the input of the LM109 to ground with 0.2 F ceramic or solid tantalum capacitor if main filter capacitor is more than 4 inches away. 2. Avoid insertion of regulator into "live" socket if input voltage is greater than 10V. The output will rise to within 2V of the unregulated input if the ground pin does not make contact, possibly damaging the load. The LM109 may also be damaged if a large output capacitor is charged up, then discharged through the internal clamp zener when the ground pin makes contact. 3. The output clamp zener is designed to absorb transients only. It will not clamp the output effectively if a failure occurs in the internal power transistor structure. Zener dynamic impedance is 4. Continuous RMS current into the zener should not exceed 0.5A. 4. Paralleling of LM109s for higher output current is not recommended. Current sharing will be almost nonexistent, leading to a current limit mode operation for devices with the highest initial output voltage. The current limit devices may also heat up to the thermal shutdown point ( 175C). Long term reliability cannot be guaranteed under these conditions. DS007138-7 Crowbar Overvoltage Protection Input Crowbar Output Crowbar DS007138-9 DS007138-8 *Zener is internal to LM109. **Q1 must be able to withstand 7A continuous current if fusing is not used at regulator input. LM109 bond wires will fuse at currents above 7A. Q2 is selected for surge capability. Consideration must be given to filter capacitor size, transformer impedance, and fuse blowing time. Trip point is 7.5V. Typical Performance Characteristics Maximum Average Power Dissipation (LM109K) Maximum Average Power Dissipation (LM309K) Output Impedance DS007138-18 DS007138-16 DS007138-17 3 www.national.com LM109/LM309 5. Preventing latchoff for loads connected to negative voltage: If the output of the LM109 is pulled negative by a high current supply so that the output pin is more than 0.5V negative with respect to the ground pin, the LM109 can latch off. This can be prevented by clamping the ground pin to the output pin with a germanium or Schottky diode as shown. A silicon diode (1N4001) at the output is also needed to keep the positive output from being pulled too far negative. The 10 resistor will raise +VOUT by 0.05V. Application Hints LM109/LM309 Typical Performance Characteristics Maximum Average Power Dissipation (LM109H) (Continued) Maximum Average Power Dissipation (LM309H) Ripple Rejection DS007138-21 DS007138-19 Current Limit Characteristics (Note 5) DS007138-20 Thermally Induced Output Voltage Variation Ripple Rejection DS007138-24 DS007138-22 DS007138-23 Note 5: Current limiting foldback characteristics are determined by input output differential, not by output voltage. Input-Output Differential (V) Output Voltage (V) DS007138-26 DS007138-25 www.national.com Output Voltage (V) 4 DS007138-27 Quiescent Current (Continued) Quiescent Current DS007138-28 Line Transient Response LM109/LM309 Typical Performance Characteristics Output Voltage Noise DS007138-29 DS007138-30 Load Transient Response DS007138-31 DS007138-32 Typical Applications Fixed 5V Regulator Adjustable Output Regulator DS007138-4 DS007138-2 *Required if regulator is located more than 4" from power supply filter capacitor. Although no output capacitor is needed for stability, it does improve transient response. C2 should be used whenever long wires are used to connect to the load, or when transient response is critical. Note: Pin 3 electrically connected to case. 5 www.national.com LM109/LM309 Typical Applications (Continued) High Stability Regulator* DS007138-5 *Regulation better than 0.01%, load, line and temperature, can be obtained. Determines zener current. May be adjusted to minimize thermal drift. Solid tantalum. Current Regulator DS007138-6 *Determines output current. If wirewound resistor is used, bypass with 0.1 F. www.national.com 6 LM109/LM309 Physical Dimensions inches (millimeters) unless otherwise noted Metal Can Package (H) Order Number LM109H, LM109H/883 or LM309H NS Package Number H03A Metal Can Package (K) Order Number LM109K STEEL, LM309K STEEL NS Package Number K02A 7 www.national.com LM109/LM309 5-Volt Regulator Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Metal Can Package (K) Mil-Aero Product Order Number LM109K/883 NS Package Number K02C LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. National Semiconductor Corporation Americas Email: support@nsc.com www.national.com National Semiconductor Europe Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Francais Tel: +33 (0) 1 41 91 8790 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: ap.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI's terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional restrictions. Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in such safety-critical applications. TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use. TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated products in automotive applications, TI will not be responsible for any failure to meet such requirements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions: Products Applications Audio www.ti.com/audio Communications and Telecom www.ti.com/communications Amplifiers amplifier.ti.com Computers and Peripherals www.ti.com/computers Data Converters dataconverter.ti.com Consumer Electronics www.ti.com/consumer-apps DLP(R) Products www.dlp.com Energy and Lighting www.ti.com/energy DSP dsp.ti.com Industrial www.ti.com/industrial Clocks and Timers www.ti.com/clocks Medical www.ti.com/medical Interface interface.ti.com Security www.ti.com/security Logic logic.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defense Power Mgmt power.ti.com Transportation and Automotive www.ti.com/automotive Microcontrollers microcontroller.ti.com Video and Imaging RFID www.ti-rfid.com OMAP Mobile Processors www.ti.com/omap Wireless Connectivity www.ti.com/wirelessconnectivity TI E2E Community Home Page www.ti.com/video e2e.ti.com Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright (c) 2011, Texas Instruments Incorporated Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments: LM109KSTEEL LM109KSTEEL/NOPB LM309KSTEEL LM309KSTEEL/NOPB