LM2990T-5.2

Product Folder Sample & Buy Technical Documents Support & Community Tools & Software LM2990 SNVS093G – JUNE 1999 – REVISED MAY 2015 LM2990 Negative Low-Dropout Regulator 1 Features 3 Description • • The LM2990 is a three-terminal, low-dropout, 1-A negative voltage regulator available with fixed output voltages of −5 V, −5.2 V, −12 V, and −15 V. 1 • • • • • • • Input Voltage: –26 V to –6 V Fixed Output Voltages: −5 V, −5.2 V, −12 V, and −15 V 5% Output Accuracy over Entire Operating Range Output Current in Excess of 1 A Dropout Voltage Typically 0.6 V at 1-A Load Low Quiescent Current Internal Short-Circuit Current Limit Internal Thermal Shutdown with Hysteresis Functional Complement to the LM2940 Series 2 Applications • • • Post Switcher Regulator Local, On-Card Regulation Battery Operated Equipment space space space Typical Application The LM2990 uses circuit design techniques to provide low-dropout and low-quiescent current. The dropout voltage at 1-A load current is typically 0.6 V and an ensured worst-case maximum of 1 V over the entire operating temperature range. The quiescent current is typically 1 mA with 1-A load current and an input-output voltage differential greater than 3 V. A unique circuit design of the internal bias supply limits the quiescent current to only 9 mA (typical) when the regulator is in the dropout mode (VOUT − VIN ≤ 3 V). Output voltage accuracy is ensured to ±5% over load and temperature extremes. The LM2990 also implements short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when overloaded for an extended period of time. All these features make the LM2990 an ideal negative power supply suited for dual supply systems. The device may also be used as fixed or adjustable current sink load. The LM2990 is available in two 3-pin packages and is rated for operation over the junction temperature range of −40°C to 125°C. Device Information(1) * and **: Required for stability. Must be at least a 10-μF aluminum electrolytic or a 1μF solid tantalum to maintain stability. May be increased without bound to maintain regulation during transients. Locate the capacitor as close as possible to the regulator. The equivalent series resistance (ESR) is critical, and should be less than 10 Ω over the same operating temperature range as the regulator. PART NUMBER LM2990 PACKAGE BODY SIZE (NOM) DDPAK/TO-263 (3) 10.20 mm x 9.00 mm TO-220 (3) 14.99 mm x 10.16 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. 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. LM2990 SNVS093G – JUNE 1999 – REVISED MAY 2015 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 6.2 6.3 6.4 6.5 6.6 6.7 4 4 4 4 5 6 6 Absolute Maximum Ratings ...................................... ESD Ratings.............................................................. Recommended Operating Conditions....................... Thermal Information .................................................. Electrical Characteristics: –5 V and –5.2 V............... Electrical Characteristics: –12 V and –15 V.............. Typical Characteristics .............................................. Detailed Description ............................................ 10 7.1 Overview ................................................................. 10 7.2 Functional Block Diagram ....................................... 10 7.3 Feature Description................................................. 10 7.4 Device Functional Modes........................................ 11 8 Application and Implementation ........................ 12 8.1 Application Information............................................ 12 8.2 Typical Application ................................................. 12 9 Power Supply Recommendations...................... 14 10 Layout................................................................... 15 10.1 Layout Guidelines ................................................. 15 10.2 Layout Example .................................................... 15 11 Device and Documentation Support ................. 16 11.1 11.2 11.3 11.4 Device Support .................................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 16 16 16 16 12 Mechanical, Packaging, and Orderable Information ........................................................... 16 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision F (February 2015) to Revision G • Page Changed "Ground" to "INPUT" in center of layout drawing ................................................................................................. 15 Changes from Revision E (November 2014) to Revision F Page • Changed word "automotive" to "junction"; update pin names to TI nomenclature ................................................................ 1 • Changed Handling Ratings to ESD Ratings table; moved Storage temperature to Ab Max.................................................. 4 • Changed wording of first sentence of Low Dropout Voltage section .................................................................................. 10 • Changed wording of first sentence of Application Information section ................................................................................ 12 • Added IOUT = 5 mA to "RMS noise" and "PSRR" rows......................................................................................................... 12 Changes from Revision D (April 2013) to Revision E • 2 Page Added Device Information and Handling Rating tables, Feature Description, Device Functional Modes, Application and Implementation, Power Supply Recommendations, Layout, Device and Documentation Support, and Mechanical, Packaging, and Orderable Information sections; moved some curves to Application Curves section; update new thermal values..................................................................................................................................................... 1 Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: LM2990 LM2990 www.ti.com SNVS093G – JUNE 1999 – REVISED MAY 2015 5 Pin Configuration and Functions 3 Pins TO-220 (NDE) Top View 3 Pins DDPAK/TO-263 (KTT) Top View 3 Pins DDPAK/TO-263 (KTT) Side View Pin Functions PIN I/O DESCRIPTION NAME NO. GND 1 IN 2 I Input voltage. OUT 3 O Regulated output voltage. — Ground. Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: LM2990 3 LM2990 SNVS093G – JUNE 1999 – REVISED MAY 2015 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) (2) Input voltage Power dissipation MIN MAX UNIT –26 0.3 V (3) Internally limited Junction temperature (TJmax) Storage temperature, Tstg (1) (2) (3) –65 125 °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 power dissipation is a function of TJmax, RθJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJmax − TA)/RθJA. If this dissipation is exceeded, the die temperature will rise above 125°C, and the LM2990 will eventually go into thermal shutdown at a TJ of approximately 160°C. Please refer to Thermal Information for more details. 6.2 ESD Ratings V(ESD) (1) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) VALUE UNIT ±2000 V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) (1) MIN NOM MAX UNIT Junction temperature (TJ) –40 125 °C Input voltage (operational) –26 –6 V (1) 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. 6.4 Thermal Information THERMAL METRIC (1) LM2990S LM2990T TO-263 (KTT) TO-220 (NDE) 3 PINS 3 PINS 41.3 22.8 43 15.7 RθJA Junction-to-ambient thermal resistance, High-K RθJC(top) Junction-to-case (top) thermal resistance RθJB Junction-to-board thermal resistance 23.2 4.2 ψJT Junction-to-top characterization parameter 11.3 2.2 ψJB Junction-to-board characterization parameter 20.4 4.2 RθJC(bot) Junction-to-case (bottom) thermal resistance 0.5 0.7 (1) 4 UNIT °C/W For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: LM2990 LM2990 www.ti.com SNVS093G – JUNE 1999 – REVISED MAY 2015 6.5 Electrical Characteristics: –5 V and –5.2 V VIN = −5 V + VOUT(NOM) (1), IOUT = 1 A, COUT = 47 μF, unless otherwise specified. All limits apply for TJ = 25°C, unless otherwise indicated in the Test Conditions. PARAMETER Output voltage (VOUT) TEST CONDITIONS 5 mA ≤ IOUT ≤ 1 A 5 mA ≤ IOUT ≤ 1 A −40°C ≤ TJ ≤ 125°C LM2990 –5V LM2990 –5.2V UNIT MIN (2) TYP (3) MAX (2) MIN (2) TYP (3) MAX (2) −5.1 –5 –4.9 −5.3 –5.2 –5.1 V –5.25 –5 −4.75 –5.46 –5.2 –4.94 V Line regulation IOUT = 5 mA, VO(NOM) −1 V > VIN > −26 V 4 40 4 40 mV Load regulation 50 mA ≤ IOUT ≤ 1 A Dropout voltage 1 40 1 40 mV IOUT = 0.1 A, ΔVOUT ≤ 100 mV −40°C ≤ TJ ≤ 125°C 0.1 0.3 0.1 0.3 V IOUT = 1 A, ΔVOUT ≤ 100 mV −40°C ≤ TJ ≤ 125°C 0.6 1 0.6 1 V Quiescent current (Iq) IOUT ≤ 1 A 1 5 1 5 IOUT = 1 A, VIN = VOUT(NOM) 9 50 9 50 Short circuit current RL = 1 Ω (4) 1.5 1.8 1.5 1.8 A Maximum output current See (4) 1.5 1.8 1.5 1.8 A Ripple rejection Vripple = 1 Vrms, ƒripple = 1 kHz, IOUT = 5 mA 50 58 50 58 dB(min) Output noise voltage 10 Hz to 100 kHz, IOUT = 5 mA Long-term stability 1000 Hours (1) (2) (3) (4) 250 2000 750 250 750 mA μV(max) 2000 ppm VOUT(NOM) is the nominal (typical) regulator output voltage, −5 V, −5.2 V, −12 V or −15 V. Limits are specified and 100% production tested. Typicals are at TJ = 25°C and represent the most likely parametric norm. The short circuit current is less than the maximum output current with the −12 V and −15 V versions due to internal foldback current limiting. The −5 V and −5.2 V versions, tested with a lower input voltage, does not reach the foldback current limit and therefore conducts a higher short circuit current level. If the LM2990 output is pulled above ground, the maximum allowed current sunk back into the LM2990 is 1.5 A. Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: LM2990 5 LM2990 SNVS093G – JUNE 1999 – REVISED MAY 2015 www.ti.com 6.6 Electrical Characteristics: –12 V and –15 V VIN = −5 V + VOUT(NOM) (1), IOUT = 1 A, COUT = 47 μF, unless otherwise specified. All limits apply for TJ = 25°C, unless otherwise indicated in the Test Conditions. PARAMETER Output voltage (VOUT) TEST CONDITIONS LM2990 –12V LM2990 –15V UNIT MIN (2) TYP (3) MAX (2) MIN (2) TYP (3) MAX (2) 5 mA ≤ IOUT ≤ 1 A −12.24 –12 –11.76 −15.30 –15 –14.70 V 5 mA ≤ IOUT ≤ 1 A −40°C ≤ TJ ≤ 125°C –12.60 –12 −11.40 –15.75 –15 –14.25 V Line regulation IOUT = 5 mA, VOUT(NOM) −1 V > VIN > −26 V 6 60 6 60 mV Load regulation 50 mA ≤ IOUT ≤ 1 A Dropout voltage 3 50 3 50 mV IOUT = 0.1 A, ΔVOUT ≤ 100 mV −40°C ≤ TJ ≤ 125°C 0.1 0.3 0.1 0.3 V IOUT = 1 A, ΔVOUT ≤ 100 mV −40°C ≤ TJ ≤ 125°C 0.6 1 0.6 1 V Quiescent current (Iq) IOUT ≤ 1 A 1 5 1 5 IOUT = 1 A, VIN = VOUT(NOM) 9 50 9 50 Short circuit current RL = 1 Ω (4) 0.9 1.2 0.75 1.2 A Maximum output current See (4) 1.4 1.8 1.4 1.8 A Ripple rejection Vripple = 1 Vrms, ƒripple = 1 kHz, IOUT = 5 mA 42 52 42 52 dB(min) Output noise voltage 10 Hz to 100 kHz, IOUT = 5 mA Long-term stability 1000 hours (1) (2) (3) (4) 500 1500 2000 500 1500 2000 mA μV(max) ppm VOUT(NOM) is the nominal (typical) regulator output voltage, −5 V, −5.2 V, −12 V or −15 V. Limits are specified and 100% production tested. Typicals are at TJ = 25°C and represent the most likely parametric norm. The short circuit current is less than the maximum output current with the −12 V and −15 V versions due to internal foldback current limiting. The −5 V and −5.2 V versions, tested with a lower input voltage, does not reach the foldback current limit and therefore conducts a higher short circuit current level. If the LM2990 output is pulled above ground, the maximum allowed current sunk back into the LM2990 is 1.5 A. 6.7 Typical Characteristics Figure 1. Dropout Voltage 6 Figure 2. Normalized Output Voltage Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: LM2990 LM2990 www.ti.com SNVS093G – JUNE 1999 – REVISED MAY 2015 Typical Characteristics (continued) Figure 3. LM2990-5.0 and LM2990-5.2 Quiescent Current Figure 4. LM2990-12 Quiescent Current Figure 5. LM2990-15 Quiescent Current Figure 6. LM2990-5 and LM2990-5.2 Low Voltage Behavior Figure 7. LM2990-5 and LM2990-5.2 Line Transient Response Figure 8. LM2990-5 and LM2990-5.2 Load Transient Response Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: LM2990 7 LM2990 SNVS093G – JUNE 1999 – REVISED MAY 2015 www.ti.com Typical Characteristics (continued) 8 Figure 9. LM2990-12 and LM2990-15 Low-Voltage Behavior Figure 10. LM2990-12 and LM2990-15 Line Transient Response Figure 11. LM2990-12 and LM2990-15 Load Transient Response Figure 12. LM2990-5 and LM2990-5.2 Ripple Rejection Figure 13. LM2990-5 and LM2990-5.2 Output Impedance Figure 14. Maximum Output Current Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: LM2990 LM2990 www.ti.com SNVS093G – JUNE 1999 – REVISED MAY 2015 Typical Characteristics (continued) Figure 15. LM2990-12 and LM2990-15 Ripple Rejection Figure 16. LM2990-12 and LM2990-15 Output Impedance Figure 17. Maximum Output Current Figure 18. Maximum Power Dissipation (TO-220) The maximum power dissipation is a function of TJmax, RθJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJmax − TA)/RθJA. If this dissipation is exceeded, the die temperature will rise above 125°C, and the LM2990 will eventually go into thermal shutdown at a TJ of approximately 160°C. Please refer to Thermal Information for more details. Figure 19. Maximum Power Dissipation (TO-263) Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: LM2990 9 LM2990 SNVS093G – JUNE 1999 – REVISED MAY 2015 www.ti.com 7 Detailed Description 7.1 Overview The LM2990 is a three-terminal, low dropout, 1-A negative voltage regulator available with fixed output voltages of −5, −5.2, −12, and −15 V. The LM2990 is a negative power supply ideally suited for a dual-supply system when using together with LM2940 series. The device may also be used as a fixed or adjustable current sink load. 7.2 Functional Block Diagram Pass Device IN OUT Reference Error Amp GND 7.3 Feature Description 7.3.1 Fixed Output-Voltage Options The LM2990 provides 4 fixed output options: −5 V, −5.2 V, −12 V, and −15 V. Output voltage accuracy is ensured to ±5% over load and temperature extremes. 7.3.2 Low Dropout Voltage Generally speaking, the dropout voltage (VDO) refers to the voltage difference between the IN pin and the OUT pin when the PNP pass element is fully on and is characterized by the classic Collector-to-Emitter saturation voltage, VCE(SAT). VDO indirectly specifies a minimum input voltage above the nominal programmed output voltage at which the output voltage is expected to remain within its accuracy boundary. 7.3.3 Short Circuit Protection (Current Limit) The internal current limit circuit is used to protect the LDO against high-load current faults or shorting events. The LDO is not designed to operate in a steady-state current limit. During a current-limit event, the LDO sources constant current. Therefore, the output voltage falls when load impedance decreases. Note also that if a current limit occurs and the resulting output voltage is low, excessive power may be dissipated across the LDO, resulting in a thermal shutdown of the output. A fold back feature limits the short-circuit current to protect the regulator from damage under all load conditions. If OUT is forced below 0 V before EN goes high, and the load current required exceeds the fold back current limit, the device may not start up correctly. 10 Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: LM2990 LM2990 www.ti.com SNVS093G – JUNE 1999 – REVISED MAY 2015 Feature Description (continued) 7.3.4 Thermal Protection The device contains a thermal shutdown protection circuit to turn off the output current when excessive heat is dissipated in the LDO. The thermal time-constant of the semiconductor die is fairly short, and thus the output cycles on and off at a high rate when thermal shutdown is reached until the power dissipation is reduced. The internal protection circuitry of the device is designed to protect against thermal overload conditions. The circuitry is not intended to replace proper heat sinking. Continuously running the device into thermal shutdown degrades its reliability. 7.4 Device Functional Modes 7.4.1 Operation with VOUT(TARGET) –5 V ≥ VIN > –26 V The device operates if the input voltage is within VOUT(TARGET) –5 V to –26 V range. At input voltages beyond the VIN requirement, the devices do not operate correctly, and output voltage may not reach target value. Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: LM2990 11 LM2990 SNVS093G – JUNE 1999 – REVISED MAY 2015 www.ti.com 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 LM2990 is a 1-A negative voltage regulator with an operating VIN range of –6 V to –26 V, and a regulated VOUT having 5% accuracy with a maximum rated IOUT current of 1 A. Efficiency is defined by the ratio of output voltage to input voltage because the LM2990 is a linear voltage regulator. To achieve high efficiency, the dropout voltage (VIN – VOUT) must be as small as possible, thus requiring a very low dropout LDO. Successfully implementing an LDO in an application depends on the application requirements. If the requirements are simply input voltage and output voltage, compliance specifications (such as internal power dissipation or stability) must be verified to ensure a solid design. If timing, start-up, noise, PSRR, or any other transient specification is required, the design becomes more challenging. 8.2 Typical Application 8.2.1 –5 V Post Regulator for an Isolated Switching Power Supply Figure 20. Post Regulator for an Isolated Switching Power Supply 8.2.1.1 Design Requirements For this design example, use the parameters listed in Table 1 as the input parameters. Table 1. Design Parameters DESIGN PARAMETER DESIGN REQUIREMENT Input voltage –10 V, provided by the DC-DC converter switching at 1 MHz Output voltage -5 V, ±10% Output current 5 mA to 400 mA RMS noise, 10 Hz to 100 kHz < 1 mVRMS, IOUT = 5 mA PSRR at 1KHz > 45 dB, IOUT = 5 mA 8.2.1.2 Detailed Design Procedure At 400-mA loading, the dropout of the LM2990 has 1-V maximum dropout over temperature, thus an –5 V headroom is sufficient for operation over both input and output voltage accuracy. The efficiency of the LM2990 in this configuration is VOUT / VIN = 50%. To achieve the smallest form factor, the TO-263(KTT) package is selected. Input and output capacitors should be selected in accordance with the External Capacitors section. Aluminum capacitances of 470 μF for the input and 50-μF capacitors for the output are selected. With an efficiency of 50% and a 400-mA maximum load, the internal power dissipation is 2000 mW, which corresponds to 82.5°C junction temperature rise for the TO-263 package. With an 25°C ambient temperature, the junction temperature is at 107.5°C. 12 Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: LM2990 LM2990 www.ti.com SNVS093G – JUNE 1999 – REVISED MAY 2015 8.2.1.2.1 External Capacitors The LM2990 regulator requires an output capacitor to maintain stability. The capacitor must be at least 10-μF aluminum electrolytic or 1-μF solid tantalum. The equivalent series resistance (ESR) of the output capacitor must be less than 10 Ω, or the zero added to the regulator frequency response by the ESR could reduce the phase margin, creating oscillations. An input capacitor, of at least 1-μF solid tantalum or 10-μF aluminum electrolytic, is also needed if the regulator is situated more than 6 from the input power supply filter. 8.2.1.2.2 Forcing The Output Positive Due to an internal clamp circuit, the LM2990 can withstand positive voltages on its output. If the voltage source pulling the output positive is DC, the current must be limited to 1.5 A. A current over 1.5 A fed back into the LM2990 could damage the device. The LM2990 output can also withstand fast positive voltage transients up to 26V, without any current limiting of the source. However, if the transients have a duration of over 1 ms, the output should be clamped with a Schottky diode to ground. Figure 21. Output Capacitor ESR 8.2.1.3 Application Curves Figure 22. LM2990-5 Line Transient Response Figure 23. LM2990-5 Load Transient Response 8.2.2 Fixed or Adjustable Current Sink The LM2990 is configurable as a fixed or adjustable current sink. As Figure 24 and Figure 25 show, the sink current is determined by the resistor value — to achieve adjustable sink current, add one adjustable resistor between output and load. Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: LM2990 13 LM2990 SNVS093G – JUNE 1999 – REVISED MAY 2015 www.ti.com Figure 24. Fixed Current Sink Figure 25. Adjustable Current Sink 8.2.2.1 Design Requirements See Design Requirements. 8.2.2.2 Detailed Design Procedure See Detailed Design Procedure. 8.2.2.3 Application Curves See Application Curves. 9 Power Supply Recommendations The LM2990 is designed to operate from an input voltage supply range between –6 V and –26 V. The input voltage range should provides adequate headroom in order for the device to have a regulated output. This input supply must be well regulated. 14 Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: LM2990 LM2990 www.ti.com SNVS093G – JUNE 1999 – REVISED MAY 2015 10 Layout 10.1 Layout Guidelines For best overall performance, place all circuit components on the same side of the circuit board and as near as practical to the respective LDO pin connections. Place ground return connections to the input and output capacitor, and to the LDO ground pin as close to each other as possible, connected by a wide, component-side, copper surface. The use of vias and long traces to create LDO circuit connections is strongly discouraged and negatively affects system performance. This grounding and layout scheme minimizes inductive parasitics, and thereby reduces load-current transients, minimizes noise, and increases circuit stability. A ground reference plane is also recommended and is either embedded in the PCB itself or located on the bottom side of the PCB opposite the components. This reference plane serves to assure accuracy of the output voltage, shield noise, and behaves similar to a thermal plane to spread (or sink) heat from the LDO device. In most applications, this ground plane is necessary to meet thermal requirements. 10.2 Layout Example INPUT 2 3 OUT GND IN 1 + Input Capacitor VIN + Output VOUT Capacitor Figure 26. LM2990 TO-263 Board Layout Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: LM2990 15 LM2990 SNVS093G – JUNE 1999 – REVISED MAY 2015 www.ti.com 11 Device and Documentation Support 11.1 Device Support 11.1.1 Device Nomenclature Dropout Voltage: The input-output voltage differential at which the circuit ceases to regulate against further reduction in input voltage. Measured when the output voltage has dropped 100 mV from the nominal value obtained at (VOUT + 5 V) input, dropout voltage is dependent upon load current and junction temperature. Input Voltage: The DC voltage applied to the input terminals with respect to ground. Input-Output Differential: The voltage difference between the unregulated input voltage and the regulated output voltage for which the regulator will operate. Line Regulation: The change in output voltage for a change in the input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that the average chip temperature is not significantly affected. Load Regulation: The change in output voltage for a change in load current at constant chip temperature. Long Term Stability: Output voltage stability under accelerated life-test conditions after 1000 hours with maximum rated voltage and junction temperature. Output Noise Voltage: The rms AC voltage at the output, with constant load and no input ripple, measured over a specified frequency range. Quiescent Current: That part of the positive input current that does not contribute to the positive load current. The regulator ground lead current. Ripple Rejection: The ratio of the peak-to-peak input ripple voltage to the peak-to-peak output ripple voltage. Temperature Stability of VOUT: The percentage change in output voltage for a thermal variation from room temperature to either temperature extreme. 11.2 Trademarks All trademarks are the property of their respective owners. 11.3 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. 11.4 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 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. 16 Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: LM2990 PACKAGE OPTION ADDENDUM www.ti.com 30-Sep-2021 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) LM2990S-12 NRND DDPAK/ TO-263 KTT 3 45 Non-RoHS & Green Call TI Level-3-235C-168 HR -40 to 125 LM2990S -12 P+ LM2990S-12/NOPB ACTIVE DDPAK/ TO-263 KTT 3 45 RoHS-Exempt & Green SN Level-3-245C-168 HR -40 to 125 LM2990S -12 P+ LM2990S-15 NRND DDPAK/ TO-263 KTT 3 45 Non-RoHS & Green Call TI Level-3-235C-168 HR -40 to 125 LM2990S -15 P+ LM2990S-15/NOPB ACTIVE DDPAK/ TO-263 KTT 3 45 RoHS-Exempt & Green SN Level-3-245C-168 HR -40 to 125 LM2990S -15 P+ LM2990S-5.0 ACTIVE DDPAK/ TO-263 KTT 3 45 Non-RoHS & Green Call TI Level-3-235C-168 HR -40 to 125 LM2990S -5.0 P+ LM2990S-5.0/NOPB ACTIVE DDPAK/ TO-263 KTT 3 45 RoHS-Exempt & Green SN Level-3-245C-168 HR -40 to 125 LM2990S -5.0 P+ LM2990SX-12 NRND DDPAK/ TO-263 KTT 3 500 Non-RoHS & Green Call TI Level-3-235C-168 HR -40 to 125 LM2990S -12 P+ LM2990SX-12/NOPB ACTIVE DDPAK/ TO-263 KTT 3 500 RoHS-Exempt & Green SN Level-3-245C-168 HR -40 to 125 LM2990S -12 P+ LM2990SX-15 NRND DDPAK/ TO-263 KTT 3 500 Non-RoHS & Green Call TI Level-3-235C-168 HR -40 to 125 LM2990S -15 P+ LM2990SX-15/NOPB ACTIVE DDPAK/ TO-263 KTT 3 500 RoHS-Exempt & Green SN Level-3-245C-168 HR -40 to 125 LM2990S -15 P+ LM2990SX-5.0 ACTIVE DDPAK/ TO-263 KTT 3 500 Non-RoHS & Green Call TI Level-3-235C-168 HR -40 to 125 LM2990S -5.0 P+ LM2990SX-5.0/NOPB ACTIVE DDPAK/ TO-263 KTT 3 500 RoHS-Exempt & Green SN Level-3-245C-168 HR -40 to 125 LM2990S -5.0 P+ LM2990T-12 NRND TO-220 NDE 3 45 Non-RoHS & Green Call TI Level-1-NA-UNLIM -40 to 125 LM2990T -12 P+ LM2990T-12/NOPB ACTIVE TO-220 NDE 3 45 RoHS & Green SN Level-1-NA-UNLIM -40 to 125 LM2990T -12 P+ LM2990T-15 NRND TO-220 NDE 3 45 Non-RoHS & Green Call TI Level-1-NA-UNLIM -40 to 125 LM2990T -15 P+ LM2990T-15/NOPB ACTIVE TO-220 NDE 3 45 RoHS & Green SN Level-1-NA-UNLIM -40 to 125 LM2990T -15 P+ Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 30-Sep-2021 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) LM2990T-5.0 NRND TO-220 NDE 3 45 Non-RoHS & Green Call TI Level-1-NA-UNLIM -40 to 125 LM2990T -5.0 P+ LM2990T-5.0/NOPB ACTIVE TO-220 NDE 3 45 RoHS-Exempt & Green SN Level-1-NA-UNLIM -40 to 125 LM2990T -5.0 P+ LM2990T-5.2/NOPB ACTIVE TO-220 NDE 3 45 RoHS & Green SN Level-1-NA-UNLIM -40 to 125 LM2990T -5.2 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". 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