LM109QML LM109QML 5-Volt Regulator Literature Number: SNVS366 LM109QML 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 solidkovar 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 Ordering Information NS Part Number NS Package Number Package Description LM109H/883 SMD Part Number H03A 3LD TO-39 Metal Can LM109K/883 K02C 2LD TO-3 Metal Can Connection Diagrams Metal Can Packages 20149933 See NS Package Number H03A Bottom View © 2005 National Semiconductor Corporation DS201499 20149934 See NS Package Number K02C Bottom View www.national.com LM109QML 5-Volt Regulator November 2005 LM109QML Schematic Diagram 20149901 www.national.com 2 LM109QML Absolute Maximum Ratings (Note 1) Input Voltage 35V Power Dissipation Internally Limited Operating Ambient Temperature Range −55˚C ≤ TA ≤ +150˚C Storage Temperature Range −65˚C ≤ TA ≤ +150˚C Maximum Junction Temperature 150˚C Thermal Resistance θJA H-Pkg (Still Air) 190˚C/W H-Pkg (500LF/Min Air flow) 69˚C/W K-Pkg (Still Air) 39˚C/W K-Pkg (500LF/Min Air flow) TBD θJC H-Pkg 25˚C/W K-Pkg 3˚C/W Lead Temperature (Soldering, 10 sec.) 300˚C ESD Tolerance (Note 6) 4000V Quality Conformance Inspection Mil-Std-883, Method 5005 - Group A Subgroup Description 1 Static tests at 25 2 Static tests at 125 3 Static tests at -55 4 Dynamic tests at 25 5 Dynamic tests at 125 6 Dynamic tests at -55 7 Functional tests at 25 8A Functional tests at 125 8B Functional tests at -55 9 Switching tests at 25 10 Switching tests at 125 11 Switching tests at -55 12 Settling time at 25 13 Settling time at 125 14 Settling time at -55 3 Temp ˚C www.national.com LM109QML LM109H Electrical Characteristics DC/AC Parameters The following conditions apply to all the following parameters, unless otherwise specified. AC / DC: IL = 5mA Symbol Parameter Conditions VStart Start Up Input Voltage VO ≥ 4.706V, RL = 25Ω IQ Quiescent Current VI = 7V VI = 7.2V, IL = 500mA Notes (Note 2) (Note 4) VI = 25V VI = 25V, IL = 500mA ∆IQ Quiescent Current Change VRLoad Line Regulation Load Regulation (Note 4) V 1 -10 mA 1, 2, 3 -10 mA 1, 2, 3 -10 mA 1, 2, 3 1, 2, 3 mA mA 1 7V ≤ VI ≤ 25 V -0.5 0.5 mA 1, 2, 3 -0.8 0.8 mA 1, 2, 3 (Note 4) 7V ≤ VI ≤ 25V -50 50 mV 1 -100 100 mV 2, 3 -50 50 mV 1 -100 100 mV 2, 3 -50 50 mV 1 -100 100 mV 2, 3 -150 150 mV 1 -50 50 mV 1 4.6 5.4 V 1, 2, 3 4.6 5.4 V 1, 2, 3 VI = 10V, IL = 100mA, P ≤ 2W 4.7 5.3 V 1 VI = 25V, IL = 20mA, P ≤ 2W 4.6 5.4 V 1 4.6 5.4 V 1, 2, 3 4.6 5.4 V 1, 2, 3 2.0 A 1 dB 4 VI = 7.2V, 5mA ≤ IL ≤ 500mA VI = 25V, tPW ≤ 10ms, 500mA ≥ IL ≥ 20mA, (Note 4) (Note 4) (Note 4) VI = 7V, P1 ≤ 2W VI = 7.2V, IL = 500mA, P ≤ 2W VI = 25V, IL = 500mA, P ≤ 2W, tPW ≤ 10mS VI = 25V, P ≤ 2W IOS Short Circuit Current VI = 35V RR Ripple Rejection ƒ ƒ ≤ 120Hz, eI = 1VRMS, IL = 125mA www.national.com Subgroups -10 VI = 25V, 20mA ≤ IL ≤ 500mA Output Voltage 9.0 Unit -10 VI = 10V, 5mA ≤ IL ≤ 500mA VO Max VI = 35V VI = 7.2V, 5mA ≤ IL ≤ 500mA VRLine Min 4 (Note 4) (Note 4) 50 LM109QML LM109K Electrical Characteristics DC/AC Parameters The following conditions apply to all the following parameters, unless otherwise specified. AC / DC: Symbol Min Parameter Conditions VStart Start Up Input Voltage VO ≥ 4.706V, RL = 5Ω IQ Quiescent Current VI = 7V VI = 7.2V, IL = 1.5A Notes (Note 2) (Note 3) VI = 25V VI = 25V, IL = 1.5A tPW ≤ 10ms (Note 3) VI = 35V ∆IQ Quiescent Current Change 7V ≤ VI ≤ 25 V VI = 7.2V, 5mA ≤ IL ≤ 1.5A (Note 3) Max 9.0 IL = 5mA (Note 6) Subgroups Unit V 1 -10 mA 1, 2, 3 -10 mA 1, 2, 3 -10 mA 1, 2, 3 -10 mA 1, 2, 3 -10 mA 1 -0.5 0.5 mA 1, 2, 3 -0.8 0.8 mA 1, 2, 3 50 mV 1 2, 3 VRLine Line Regulation 7V ≤ VI ≤ 25V -50 -100 100 mV VRLoad Load Regulation VI = 7.2V, 5mA ≤ IL ≤ 1.5A -100 100 mV 1 (Note 3) -200 200 mV 2, 3 VI = 10V, 1.5A ≥ IL ≥ 5mA -100 100 mV 1 (Note 3) -200 200 mV 2, 3 VI = 25V, tPW < 10ms, 1A ≥ IL ≥ 20mA, -50 50 mV 1 VI = 7V, P1 ≤ 20W 4.6 5.4 V 1, 2, 3 4.6 5.4 V 1, 2, 3 VI = 10V, IL = 500mA, P ≤ 20W 4.7 5.3 V 1 VI = 25V, IL = 20mA, P ≤ 20W 4.6 5.4 V 1 VI = 25V, IL = 1A, P ≤ 20W, tPW ≤ 10mS 4.6 5.4 V 1, 2, 3 VI = 25V, P ≤ 20W 4.6 5.4 V 1, 2, 3 2.8 A 1 dB 4 VO Output Voltage VI = 7.2V, IL = 1.5A, P ≤ 20W IOS Short Circuit Current VI = 35V RR Ripple Rejection ƒ ≤ 120Hz, eI = 1VRMS, IL = 500mA (Note 3) 50 DC Parameters The following conditions apply to all the following parameters, unless otherwise specified. DC: IL = 5mA(Note 6) Symbol Min Max Parameter VN Output Noise Voltage ∆VO / ∆T Long Term Stability Conditions 10Hz ≤ ƒ ≤ 100KHz Notes Unit Subgroups (Note 5) 200 µV 7 (Note 5) 10 mV 8 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. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions. Note 2: This test is performed by shifting the input voltage in 50mV increments until output reaches 4.706V. Note 3: At −55˚C & 125˚C, IL = 1A rather than 1.5A. Note 4: At −55˚C & 125˚C, IL = 200mA rather than 500mA. Note 5: Guaranteed parameter, not tested. Note 6: Human body model, 1.5kΩ in series with 100PF. 5 www.national.com LM109QML Application Hints Crowbar Overvoltage Protection 1. Bypass the input of the LM109 to ground with ≥ 0.2 µF 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. Input Crowbar 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 ≈ 4Ω. 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 (≈ 175˚C). Long term reliability cannot be guaranteed under these conditions. 5. Preventing latchoff for loads connected to negative voltage: 20149908 Output Crowbar 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 10Ω resistor will raise +VOUT by ≈ 0.05V. 20149909 *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. 20149907 www.national.com 6 LM109QML Typical Performance Characteristics Maximum Average Power Dissipation (LM109K) Output Impedance 20149916 20149918 Maximum Average Power Dissipation (LM109H) Ripple Rejection 20149919 20149921 Current Limit Characteristics (Note 7) Thermally Induced Output Voltage Variation 20149923 20149922 7 www.national.com LM109QML Typical Performance Characteristics (Continued) Ripple Rejection 20149924 Note 7: Current limiting foldback characteristics are determined by input output differential, not by output voltage. Input-Output Differential (V) Output Voltage (V) 20149926 20149925 Output Voltage (V) Quiescent Current 20149927 www.national.com 20149928 8 LM109QML Typical Performance Characteristics (Continued) Quiescent Current Output Voltage Noise 20149930 20149929 Line Transient Response Load Transient Response 20149931 20149932 Typical Applications Adjustable Output Regulator Fixed 5V Regulator 20149904 20149902 *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. 9 www.national.com LM109QML Typical Applications (Continued) High Stability Regulator* 20149905 *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 20149906 *Determines output current. If wirewound resistor is used, bypass with 0.1 µF. www.national.com 10 LM109QML Revision History Date Released 11/08/05 Revision A Section Originator New release to corporate format L. Lytle 11 Changes 2 MDS datasheets converted into one datasheet in the corporate format. Deleted note 5 & corrected VRLoad of LM109K to ≥ . MNLM109-K Rev 0AL & MNLM109-H Rev 0AL will be archived. www.national.com LM109QML Physical Dimensions inches (millimeters) unless otherwise noted Metal Can Package (H) NS Package Number H03A Metal Can Package (K) NS Package Number K02C www.national.com 12 LM109QML 5-Volt Regulator Notes 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. For the most current product information visit us at www.national.com. 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