LM79M05, LM79M12, LM79M15 www.ti.com SNOS553D – MAY 1998 – REVISED APRIL 2013 LM79MXX Series 3-Terminal Negative Regulators Check for Samples: LM79M05, LM79M12, LM79M15 FEATURES DESCRIPTION • The LM79MXX series of 3-terminal regulators is available with fixed output voltages of −5V, −12V, and −15V. These devices need only one external component—a compensation capacitor at the output. The LM79MXX series is packaged in the TO-220 power package, and is capable of supplying 0.5A of output current. 1 2 • • • Thermal, Short Circuit and Safe Area Protection High Ripple Rejection 0.5A Output Current 4% Tolerance on Preset Output Voltage These regulators employ internal current limiting, safe area protection, and thermal shutdown for protection against virtually all overload conditions. Low ground pin current of the LM79MXX series allows output voltage to be easily boosted above the preset value with a resistor divider. The low quiescent current of these devices with a specified maximum change with line and load ensures good regulation in the voltage boosted mode. For output voltage other than −5V, −12V, and −15V the LM137 series provides an output voltage range from −1.2V to −57V. Connection Diagram Figure 1. TO-220 Plastic Package (NDE) Front View See Package Number NDE0003B 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 1998–2013, Texas Instruments Incorporated LM79M05, LM79M12, LM79M15 SNOS553D – MAY 1998 – REVISED APRIL 2013 www.ti.com 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. Absolute Maximum Ratings (1) (2) Input Voltage VO = −5V −25V VO = −12V, −15V −35V VO = −5V Input/Output Differential 25V VO = −12V, −15V Power Dissipation 30V (3) Internally Limited Operating Junction Temperature Range 0°C to +125°C −65°C to +150°C Storage Temperature Range Lead Temperature (Soldering, 10 sec.) 230°C ESD Susceptibility (1) (2) (3) TBD Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and specifications. Refer to Typical Performance Characteristics and Design Considerations for details. Electrical Characteristics LM79M05C Conditions unless otherwise noted: IOUT = 350mA, CIN = 2.2μF, COUT = 1μF, 0°C ≤ TJ ≤ +125°C Part Number LM79M05C Output Voltage −5V Input Voltage (Unless Otherwise Specified) −10V Symbol VO Parameter Conditions Output Voltage Units Min Typ Max TJ = 25°C −4.8 −5.0 −5.2 V 5mA ≤ IOUT ≤ 350mA −4.75 −5.25 V 50 mV 30 mV 100 mV (−25 ≤ VIN ≤ −7) ΔVO Line Regulation TJ = 25°C (1) 8 (−25 ≤ VIN ≤ −7) 2 (−18 ≤ VIN ≤ − 8) ΔVO Load Regulation TJ = 25°C, (1) 30 5mA ≤ IOUT ≤ 0.5A IQ Quiescent Current TJ = 25°C ΔIQ Quiescent Current With Input Voltage 1 2 mA 0.4 mA 0.4 mA (−25 ≤ VIN ≤ −8) Change With Load, 5mA ≤ IOUT ≤ 350mA Vn Output Noise Voltage TA = 25°C, 150 μV 66 dB 10Hz ≤ f ≤ 100Hz Ripple Rejection f = 120Hz 54 (−18 ≤ VIN ≤ −8) IOMAX (1) 2 Dropout Voltage TJ = 25°C, IOUT = 0.5A 1.1 V Peak Output Current TJ = 25°C 800 mA Average Temperature IOUT = 5mA, Coefficient of Output Voltage 0°C ≤ TJ ≤ 100°C −0.4 mV/°C Regulation is measured at a constant junction temperature by pulse testing with a low duty cycle. Changes in output voltage due to heating effects must be taken into account. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM79M05 LM79M12 LM79M15 LM79M05, LM79M12, LM79M15 www.ti.com SNOS553D – MAY 1998 – REVISED APRIL 2013 Electrical Characteristics LM79M12C, LM79M15C Conditions unless otherwise noted: IOUT = 350mA, CIN = 2.2μF, COUT = 1 μF, 0°C ≤ TJ ≤ +125°C Part Number LM79M12C LM79M15C Output Voltage −12V −15V Input Voltage (Unless Otherwise Specified) −19V −23V Symbo l VO Parameter Output Voltage Conditions Min Typ Max Min Typ TJ = 25°C −11.5 −12.0 5 mA ≤ IOUT ≤ 350mA −11.4 −12.5 −14.4 −15.0 −12.6 −14.25 (−27 ≤ VIN ≤ −14.5) ΔVO Line Regulation TJ = 25°C (1) 5 80 Load Regulation TJ = 25°C, (1) −15.6 V −15.75 V 5 80 mV 50 mV (−30 ≤ VIN ≤−17.5) 50 3 (−25 ≤ VIN ≤ − 15) ΔVO Max (−30 ≤ VIN ≤ −10.5) (−30 ≤ VIN ≤ −14.5) 3 Units (−28 ≤ VIN ≤ −18) 30 240 30 240 mV 1.5 3 1.5 3 mA 0.4 mA 0.4 mA 5mA ≤ IOUT ≤ 0.5A IQ Quiescent Current TJ = 25°C ΔIQ Quiescent Current With Input Voltage 0.4 (−30 ≤ VIN ≤ −14.5) Change (−30 ≤ VIN ≤ −27) With Load, 5mA ≤ IOUT ≤ 350mA Vn Output Noise Voltage 0.4 TA = 25°C, 400 (1) μV 70 dB 10Hz ≤ f ≤ 100Hz Ripple Rejection f = 120Hz 54 70 Dropout Voltage TJ = 25°C, IOUT = 0.5A 1.1 1.1 V Peak Output Current TJ = 25°C 800 800 mA Average Temperature IOUT = 5mA, Coefficient of Output Voltage 0°C ≤ TJ ≤ 100°C −0.8 −1.0 mV/°C (−25 ≤ VIN ≤ −15) IOMAX 400 54 (−30 ≤ VIN ≤ −17.5) Regulation is measured at a constant junction temperature by pulse testing with a low duty cycle. Changes in output voltage due to heating effects must be taken into account. Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM79M05 LM79M12 LM79M15 Submit Documentation Feedback 3 LM79M05, LM79M12, LM79M15 SNOS553D – MAY 1998 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics 4 Output Voltage vs. Temperature Ripple Rejection Figure 2. Figure 3. Output Impedance Minimum Input-Output Differential Figure 4. Figure 5. Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM79M05 LM79M12 LM79M15 LM79M05, LM79M12, LM79M15 www.ti.com SNOS553D – MAY 1998 – REVISED APRIL 2013 Typical Performance Characteristics (continued) Quiescent Current vs. Input Voltage Quiescent Current vs. Load Current Figure 6. Figure 7. Short-Circuit Current Maximum Average Power Dissipation (TO-220) Figure 8. Figure 9. Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM79M05 LM79M12 LM79M15 Submit Documentation Feedback 5 LM79M05, LM79M12, LM79M15 SNOS553D – MAY 1998 – REVISED APRIL 2013 www.ti.com Schematic Diagrams Figure 10. −5V Figure 11. −12V and −15V 6 Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM79M05 LM79M12 LM79M15 LM79M05, LM79M12, LM79M15 www.ti.com SNOS553D – MAY 1998 – REVISED APRIL 2013 DESIGN CONSIDERATIONS The LM79MXX fixed voltage regulator series have thermal-overload protection from excessive power, internal short-circuit protection which limits the circuit's maximum current, and output transistor safe-area compensation for reducing the output current as the voltage across the pass transistor is increased. Although the internal power dissipation is limited, the junction temperature must be kept below the maximum specified temperature in order to meet data sheet specifications. To calculate the maximum junction temperature or heat sink required, the following thermal resistance values should be used: Package TO-220 θJC θJA (°C/W) (°C/W) 3 40 (1) θCA = θCS+θSA Solving for TJ: TJ = TA+ PD (θJC+θCA) or = TA=+ PDθJA(Without a Heat Sink) Where TJ = Junction Temperature TA = Ambient Temperature PD = Power Dissipation θJC = Junction-to-Case Thermal Resistance θCA = Case-to-Ambient Thermal Resistance θCS = Case-to-Heat Sink Thermal Resistance θSA = Heat Sink-to-Ambient Thermal Resistance θJA = Junction-to-Ambient Thermal Resistance Typical Applications Bypass capacitors are necessary for stable operation of the LM79MXX series of regulators over the input voltage and output current ranges. Output bypass capacitors will improve the transient response of the regulator. The bypass capacitors (2.2μF on the input, 1.0μF on the output), should be ceramic or solid tantalum which have good high frequency characteristics. If aluminum electrolytics are used, their values should be 10μF or larger. The bypass capacitors should be mounted with the shortest leads, and if possible, directly across the regulator terminals. Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM79M05 LM79M12 LM79M15 Submit Documentation Feedback 7 LM79M05, LM79M12, LM79M15 SNOS553D – MAY 1998 – REVISED APRIL 2013 www.ti.com *Required if regulator is separated from filter capacitor by more than 3″. For value given, capacitor must be solid tantalum. 25μF aluminum electrolytic may be substituted. †Required for stability. For value given, capacitor must be solid tantalum. 25μF aluminum electrolytic may be substituted. Values given may be increased without limit. For output capacitance in excess of 100μF, a high current diode from input to output (1N4001, etc.) will protect the regulator from momentary input shorts. Figure 12. Fixed Regulator *Improves transient response and ripple rejection. Do not increase beyond 50μF. Select R2 as follows: LM79M05C 300Ω LM79M12C 750Ω LM79M15C 1k Figure 13. Variable Output *Resistor tolerance of R4 and R5 determine matching of (+) and (−) outputs. **Necessary only if raw supply filter capacitors are more than 3″ from regulators. Figure 14. ±15V, 1 Amp Tracking Regulators 8 Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM79M05 LM79M12 LM79M15 LM79M05, LM79M12, LM79M15 www.ti.com SNOS553D – MAY 1998 – REVISED APRIL 2013 Performance (Typical) (−15) Load Regulation at 0.5A Output Ripple, CIN = 3000μF, IL = 0.5A Temperature Stability Output Noise 10Hz ≤ f ≤ 10kHz (+15) 40mV 2 mV 100 μVrms 100 μVrms 50mV 50mV 150 μVrms 150 μVrms Figure 15. Dual Trimmed Supply Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM79M05 LM79M12 LM79M15 Submit Documentation Feedback 9 LM79M05, LM79M12, LM79M15 SNOS553D – MAY 1998 – REVISED APRIL 2013 www.ti.com REVISION HISTORY Changes from Revision C (April 2013) to Revision D • 10 Page Changed layout of National Data Sheet to TI format ............................................................................................................ 9 Submit Documentation Feedback Copyright © 1998–2013, Texas Instruments Incorporated Product Folder Links: LM79M05 LM79M12 LM79M15 PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish (2) MSL Peak Temp Op Temp (°C) Top-Side Markings (3) (4) LM79M12CT ACTIVE TO-220 NDE 3 45 TBD Call TI Call TI 0 to 125 LM79M 12CT LM79M12CT/NOPB ACTIVE TO-220 NDE 3 45 Green (RoHS & no Sb/Br) CU SN Level-1-NA-UNLIM 0 to 125 LM79M 12CT (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) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. 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