LM79L05,LM79L05AC,LM79L12,LM79L12AC, LM79L15,LM79L15AC LM79LXXAC Series 3-Terminal Negative Regulators Literature Number: SNOSBR8J LM79LXXAC Series 3-Terminal Negative Regulators General Description The LM79LXXAC series of 3-terminal negative voltage regulators features fixed output voltages of -5V, -12V, and -15V with output current capabilities in excess of 100mA. These devices were designed using the latest computer techniques for optimizing the packaged IC thermal/electrical performance. The LM79LXXAC series, when combined with a minimum output capacitor of 0.1F, exhibits an excellent transient response, a maximum line regulation of 0.07% VO/ V, and a maximum load regulation of 0.01% VO/mA. The LM79LXXAC series also includes, as self-protection circuitry: safe operating area circuitry for output transistor power dissipation limiting, a temperature independent short circuit current limit for peak output current limiting, and a thermal shutdown circuit to prevent excessive junction temperature. Although designed primarily as fixed voltage regulators, these devices may be combined with simple external circuitry for boosted and/or adjustable voltages and currents. The LM79LXXAC series is available in the 3-lead TO-92 package, the 8-lead SOIC package, and the 6-Bump micro-SMD package. For output voltages other than the pre-set -5V, -12V and -15V, the LM137L series provides an adjustable output voltage range from -1.2V to -47V. Features Preset output voltage error is less than 5% overload, line and temperature Specified at an output current of 100mA Easily compensated with a small 0.1F output capacitor Internal short-circuit, thermal and safe operating area protection Easily adjustable to higher output voltages Maximum line regulation less than 0.07% VOUT/V Maximum load regulation less than 0.01% VOUT/mA See AN-1112 for micro-SMD considerations Typical Applications Fixed Output Regulator Adjustable Output Regulator 774801 *Required if the regulator is located far from the power supply filter. A 1F aluminum electrolytic may be substituted. -V0 = -5V - (5V/R1 + IQ) * R2, **Required for stability. A 1F aluminum electrolytic may be substituted. 5V/R1 > 3 IQ (c) 2011 National Semiconductor Corporation 7748 774803 www.national.com LM79LXXAC Series 3-Terminal Negative Regulators October 11, 2011 LM79LXXAC Connection Diagrams 8-Lead SOIC Narrow (M) 774804 Pins labeled 'NC' on LM79LXXACM 8-Lead SOIC (pin 4 and pin 8) are Open, no internal connection. Top View 3-Lead TO-92 (Z) 774802 Bottom View 6-Bump micro-SMD 774820 Top View (Bump Side Down) Ordering Information Package Part Number Package Marking Transport Media LM79L05ACM LM79L 05ACM Reel of 2500 LM79L 12ACM Reel of 2500 LM79L05ACMX 8-Lead SOIC LM79L12ACM LM79L12ACMX LM79L15ACM LM79L15ACMX 3-Pin TO-92 6-Bump micro-SMD www.national.com Rail of 95 Rail of 95 Reel of 2500 LM79L05ACZ Box of 1800 LM79L12ACZ 320L 79L12 Box of 1800 LM79L15ACZ 320L 79L15 Obsolete LM79L05ACTL M08A Rail of 95 LM79L 15ACM 320L 79L05 LM79L05ACTLX NSC Drawing Reel of 250 XVP IB Reel of 3000 2 Z03A TLA06AMA If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage VO = -5V, -12V, -15V -35V Electrical Characteristics Internally Limited 0C to +70C +125C -55C to +150C 260C (Note 3) TA = 0C to +70C unless otherwise noted. Output Voltage -5V -12V -15V Input Voltage (unless otherwise noted) -10V -17V -20V Symbol VO Parameter Output Voltage Conditions Min Typ Max Min Typ Max Min Typ Max TJ = 25C, IO = 100mA -5.2 -5 -4.8 -12.5 -12 -11.5 -15.6 -15 -14.4 1mA IO 100mA -5.25 -4.75 -12.6 -11.4 -15.75 VMIN VIN VMAX (-20 VIN -7.5) (-27 VIN -14.8) (-30 VIN -18) 1mA IO 40mA -5.25 -12.6 -15.75 VMIN VIN VMAX (-20 VIN -7) -4.75 TJ = 25C, IO = 100mA VO Line Regulation VMIN VIN VMAX (-27 VIN -14.5) (-20 VIN -7.3) (-20 VIN -7) TJ = 25C (-27 VIN -14.6) (-27 VIN -14.5) VO Long Term Stability IO = 100mA 20 IQ Quiescent Current IO = 100mA 2 IQ Quiescen Current Change V -14.25 (-30 VIN -17.5) 45 (-30 VIN -17.7) 45 50 Load Regulation -14.25 45 60 VO 45 (-30 VIN -17.5) 100 125 mV V mV V mV 1mA IO 100mA 48 6 2 mV/ khrs 60 6 2 6 mA 1mA IO 100mA 0.3 0.3 0.3 1mA IO 40mA 0.1 0.1 0.1 mA 0.25 mA IO = 100mA VMIN VIN VMAX 0.25 (-20 VIN -7.5) Output Noise TJ = 25C, IO = 100mA Voltage f = 10Hz - 10kHz Ripple Rejection -11.4 60 TJ = 25C, IO = 40mA VMIN VIN VMAX Vn Units TJ = 25C, IO = 100mA f = 120Hz 0.25 (-27 VIN -14.8) 40 (-30 VIN -18) 96 50 Input Voltage TJ = 25C, IO = 100mA Required to Maintain Line IO = 40mA Regulation V 120 52 V 50 dB -7.3 -14.6 -17.7 V -7.0 -14.5 -17.5 V 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: Thermal resistance of TO-3 (Z) package is 60C/W JC, 232C/W JA at still air, and 88C/W at 400 ft/min of air. The JA of the LM78LXX in the 6-Bump micro-SMD package is 114C/W when mounted on a 4-Layer JEDEC test board (JESD 51-7). The JA of the LM78LXX in the SOIC-8 (M) package is 180C/W in still air. The maximum junction temperature shall not exceed 125C on electrical parameters. Note 3: To ensure constant junction temperature, low duty cycle pulse testing is used. 3 www.national.com LM79LXXAC Internal Power Dissipation (Note 2) Operating Temperature Range Maximum Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10 sec.) Absolute Maximum Ratings (Note 1) LM79LXXAC Typical Performance Characteristics Maximum Average Power Dissipation (TO-92) Peak Output Current 774811 774812 Short Circuit Output Current Dropout Voltage 774813 774814 Ripple Rejection Output Voltage vs. Temperature (Normalized to 1V @ 25C) 774815 774816 www.national.com 4 LM79LXXAC Quiescent Current Output Impedance 774817 774818 Typical Applications 15V, 100mA Dual Power Supply 774806 5 www.national.com LM79LXXAC Schematic Diagrams -5V 774809 -12V and -15V 774810 www.national.com 6 LM79LXXAC Physical Dimensions inches (millimeters) unless otherwise noted 8-Lead, SOIC NARROW NS Package Number M08A TO-92, Molded, 3-Lead NS Package Number Z03A 7 www.national.com LM79LXXAC NOTES: UNLESS OTHERWISE SPECIFIED 1. EPOXY COATING. 2. 63Sn/67Pb EUTECTIC BUMP. 3. RECOMMEND NON-SOLDER MASK DEFINED LANDING PAD. 4. PIN A1 ESTABLISHED BY LOWER LEFT CORNER WITH RESPECT TO TEXT ORIENTATION. 5. XXX IN DRAWING NUMBER REPRESENTS PACKAGE SIZE VARIATION WHERE X1 IS PACKAGE WIDTH, X2 IS PACKAGE LENGTH AND X3 IS PACKAGE HEIGHT. 6. REFERENCE JEEC REGISTRATION MO-211, VARIATION BC. 6-Bump micro SMD NS Package Number TLA06AMA X1 = 1006m X2 = 1793m X3 = 600m www.national.com 8 LM79LXXAC Notes 9 www.national.com LM79LXXAC Series 3-Terminal Negative Regulators Notes For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Design Support Amplifiers www.national.com/amplifiers WEBENCH(R) Tools www.national.com/webench Audio www.national.com/audio App Notes www.national.com/appnotes Clock and Timing www.national.com/timing Reference Designs www.national.com/refdesigns Data Converters www.national.com/adc Samples www.national.com/samples Interface www.national.com/interface Eval Boards www.national.com/evalboards LVDS www.national.com/lvds Packaging www.national.com/packaging Power Management www.national.com/power Green Compliance www.national.com/quality/green Switching Regulators www.national.com/switchers Distributors www.national.com/contacts LDOs www.national.com/ldo Quality and Reliability www.national.com/quality LED Lighting www.national.com/led Feedback/Support www.national.com/feedback Voltage References www.national.com/vref Design Made Easy www.national.com/easy www.national.com/powerwise Applications & Markets www.national.com/solutions Mil/Aero www.national.com/milaero PowerWise(R) Solutions Serial Digital Interface (SDI) www.national.com/sdi Temperature Sensors www.national.com/tempsensors SolarMagicTM www.national.com/solarmagic PLL/VCO www.national.com/wireless www.national.com/training PowerWise(R) Design University THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION ("NATIONAL") PRODUCTS. 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