LP2980-ADJ www.ti.com SNVS001E – APRIL 2000 – REVISED APRIL 2013 LP2980-ADJ Micropower 50 mA Ultra Low-Dropout Adjustable Voltage Regulator in SOT-23 Check for Samples: LP2980-ADJ FEATURES DESCRIPTION • • • • • • • • • • • The LP2980-ADJ is a 50 mA adjustable voltage regulator designed to provide ultra low dropout in battery powered applications. 1 2 Ultra Low Dropout Voltage Output Adjusts from 1.23V to 15V Specified 50 mA Output Current Uses Tiny SOT-23 Package Requires Few External Components <1 μA Quiescent Current when Shutdown Low Ground Pin Current at All Loads High Peak Current Capability (150 mA Typical) Wide Supply Voltage Range (2.5V–16V) Overtemperature/overcurrent Protection −40°C to +125°C Junction Temperature Range APPLICATIONS • • • Cellular Phone Palmtop/Laptop Computer Camcorder, Personal Stereo, Camera Using an optimized VIP (vertically Integrated PNP) process, the LP2980-ADJ delivers unequaled performance in all specifications critical to batterypowered designs: Adjustable Output: output voltage can be set from 1.23V to 15V. Precision Reference: 1.0% tolerance. Dropout Voltage: typically 120 mV @ 50 mA load, and 7 mV @ 1 mA load. Ground Pin Current: typically 320 µA @ 50 mA load, and 80 µA @ 1 mA load. Sleep Mode: less than 1 μA quiescent current when on/off pin is pulled low. Smallest Possible Size: Package uses minimum board space. Block Diagram 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 © 2000–2013, Texas Instruments Incorporated LP2980-ADJ SNVS001E – APRIL 2000 – REVISED APRIL 2013 www.ti.com Connection Diagram Figure 1. 5-Lead Small Outline Package Top View See Package Number DBV0005A PIN DESCRIPTIONS 2 Name Pin Number Function VIN 1 Input Voltage GND 2 Common Ground (device substrate) ON/OFF 3 Logic high enable pin ADJ 4 Output voltage feedback pin VOUT 5 Regulated output voltage Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LP2980-ADJ LP2980-ADJ www.ti.com SNVS001E – APRIL 2000 – REVISED APRIL 2013 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) Storage Temperature Range −65 to +150°C Operating Junction Temperature Range −40 to +125°C Lead Temp. (Soldering, 5 seconds) ESD Rating 260°C (3) Power Dissipation 2 kV (4) Internally Limited −0.3V to +16V Input Supply Voltage (Survival) Input Supply Voltage (Operating) 2.5V to +16V −0.3V to +16V Shutdown Input Voltage (Survival) Output Voltage (Survival) (5) −0.3V to 16V IOUT (Survival) Short Circuit Protected Input-Output Voltage (Survival) (1) (2) (3) (4) (5) (6) (6) −0.3V to 16V Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside of its rated operating conditions. If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and specifications. The ESD rating of pins 3 and 4 is 1 kV. The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX), the junction-to-ambient thermal resistance, θJ-A, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: . The value of θJ-A for the SOT-23 package is 300°C/W. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. If used in a dual-supply system where the regulator load is returned to a negative supply, the LP2980-ADJ output must be diodeclamped to ground. The output PNP structure contains a diode between the VIN and VOUT terminals that is normally reverse-biased. Reversing the polarity from VIN to VOUT will turn on this diode (see APPLICATION HINTS). ELECTRICAL CHARACTERISTICS Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range. Unless otherwise specified: VIN = 4.3V, VOUT = 3.3V, IL = 1 mA, CIN = 1 μF, COUT = 2.2 μF, VON/OFF = 2V. Symbol VREF Parameter Conditions Reference Voltage 1 mA < IL < 50 mA VOUT + 1 ≤ VIN ≤ 16V ΔVREF/ΔVIN VIN–VO (1) (2) Reference Voltage Line Regulation Dropout Voltage (2) Typ LP2980I-ADJ (1) Min Max 1.225 1.213 1.237 1.225 1.206 1.182 1.243 1.268 2.5V ≤ VIN ≤ 16V 3 6.0 15.0 IL = 0 1 3 5 IL = 1 mA 7 10 15 IL = 10 mA 40 60 90 IL = 50 mA 120 150 225 Units V mV mV Limits are 100% production tested at 25°C. Limits over the operating temperature range are specified through correlation using Statistical Quality Control (SQC) methods. The limits are used to calculate TI's Average Outgoing Quality Level (AOQL). Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below the value measured with a 1V differential. Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LP2980-ADJ 3 LP2980-ADJ SNVS001E – APRIL 2000 – REVISED APRIL 2013 www.ti.com ELECTRICAL CHARACTERISTICS (continued) Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range. Unless otherwise specified: VIN = 4.3V, VOUT = 3.3V, IL = 1 mA, CIN = 1 μF, COUT = 2.2 μF, VON/OFF = 2V. Symbol IGND Parameter Conditions Ground Pin Current Typ LP2980I-ADJ Min (1) Max IL = 0 60 95 125 IL = 1 mA 80 110 170 IL = 10 mA 120 220 460 IL = 50 mA 320 600 1200 VON/OFF < 0.18V 0.01 1 IADJ ADJ Pin Bias Current 1 mA ≤ IL ≤ 50 mA 150 350 VON/OFF ON/OFF Input Voltage High = O/P ON 1.4 Low = O/P OFF 0.55 0.18 VON/OFF = 0 0.01 −1 5 15 (3) ION/OFF ON/OFF Input Current VON/OFF = 5V IO(PK) Peak Output Current VOUT ≥ VO(NOM) − 5% 150 en Output Noise Voltage (RMS) BW = 300 Hz to 50 kHz, COUT = 10 μF 160 ΔVOUT/ΔVIN Ripple Rejection f = 1 kHz COUT = 10 μF 68 IO(MAX) Short Circuit Current RL = 0 (Steady State) 150 (3) (4) (4) 1.6 100 Units μA nA V μA mA μV dB mA The ON/OFF input must be properly driven to prevent possible misoperation. For details, refer to APPLICATION HINTS. See TYPICAL PERFORMANCE CHARACTERISTICS curves. TYPICAL APPLICATION CIRCUIT *ON/OFF INPUT MUST BE ACTIVELY TERMINATED. TIE TO VIN IF THIS FUNCTION IS NOT TO BE USED. **MINIMUM CAPACITANCE IS SHOWN TO ENSURE STABILITY OVER FULL LOAD CURRENT RANGE (SEE APPLICATION HINTS). 4 Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LP2980-ADJ LP2980-ADJ www.ti.com SNVS001E – APRIL 2000 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise specified: TA = 25°C, VIN = VO(NOM) + 1V, IL = 1 mA, ON/OFF pin tied to VIN, RADJ = 86.6k, and test circuit is as shown in Basic Application Circuit. Output Voltage vs. Temperature Dropout Characteristics Figure 2. Figure 3. Dropout Voltage vs. Temperature Dropout Voltage vs. Load Current Figure 4. Figure 5. Ground Pin Current vs. Temperature Ground Pin Current vs. Load Current Figure 6. Figure 7. Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LP2980-ADJ 5 LP2980-ADJ SNVS001E – APRIL 2000 – REVISED APRIL 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified: TA = 25°C, VIN = VO(NOM) + 1V, IL = 1 mA, ON/OFF pin tied to VIN, RADJ = 86.6k, and test circuit is as shown in Basic Application Circuit. 6 Input Current vs. VIN Load Transient Response Figure 8. Figure 9. Line Transient Response Short Circuit Current Figure 10. Figure 11. Short Circuit Current Load Regulation Figure 12. Figure 13. Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LP2980-ADJ LP2980-ADJ www.ti.com SNVS001E – APRIL 2000 – REVISED APRIL 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified: TA = 25°C, VIN = VO(NOM) + 1V, IL = 1 mA, ON/OFF pin tied to VIN, RADJ = 86.6k, and test circuit is as shown in Basic Application Circuit. ADJ Pin Bias Current vs. Load Current ADJ Pin Bias Current vs. Temperature Figure 14. Figure 15. ON/OFF Threshold vs.Temperature Output Noise Density Figure 16. Figure 17. Ripple Rejection Figure 18. Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LP2980-ADJ 7 LP2980-ADJ SNVS001E – APRIL 2000 – REVISED APRIL 2013 www.ti.com APPLICATION HINTS EXTERNAL CAPACITORS Like any low-dropout regulator, the external capacitors must be selected carefully to assure regulator loop stability. INPUT CAPACITOR: An input capacitor whose value is ≥1 μF is required (the amount of capacitance may be increased without limit). Any good quality Tantalum or Ceramic capacitor may be used here. The capacitor must be located not more than 0.5″ from the input pin and returned to a clean analog ground. OUTPUT CAPACITOR: The output capacitor must meet both the requirement for minimum amount of capacitance and E.S.R. (Equivalent Series Resistance) for stable operation. Curves are provided below which show the allowable ESR of the output capacitor as a function of load current for both 2.2 μF and 4.7 μF. A solid Tantalum capacitor is the best choice for the output. Figure 19. 2.2 μF ESR Curves Figure 20. 4.7 μF ESR Curves IMPORTANT: The output capacitor must maintain its ESR in the stable region over the full operating temperature range to assure stability. Also, capacitor tolerance and variation with temperature must be considered to assure the minimum amount of capacitance is provided at all times. Note that this capacitor must be located not more than 0.5” from the output pin and returned to a clean analog ground. FEED-FORWARD CAPACITOR: A 7 pF feed-forward capacitor is required (see Basic Application Circuit). The function of this capacitor is to provide the lead compensation necessary for loop stability. A temperature-stable ceramic capacitor (type NPO or COG) should be used here. CAPACITOR CHARACTERISTICS TANTALUM: The best capacitor choice for the LP2980-ADJ output is solid Tantalum. The ESR of a good quality Tantalum is almost perfectly centered in the middle of the “stable” range of the ESR curve (about 0.5Ω–1Ω). The temperature stability of Tantalums is typically very good, with a total variation of only about 2:1 over the temperature range of −40°C to +125°C (ESR increases at colder temperatures). Off-brand capacitors should be avoided, as some poor quality Tantalums are seen with ESR's > 10Ω, and this usually causes oscillation problems. One caution about Tantalums if they are used on the input: the ESR of a Tantalum is low enough that it can be destroyed by surge current if powered up from a low impedance source (like a battery) that has no limit on inrush current. In these cases, use a ceramic input capacitor which does not have this problem. CERAMIC: Ceramics are generally larger and more costly than Tantalums for a given amount of capacitance. Also, they have a very low ESR which is quite stable with temperature. 8 Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LP2980-ADJ LP2980-ADJ www.ti.com SNVS001E – APRIL 2000 – REVISED APRIL 2013 Be warned that the ESR of a ceramic capacitor is typically low enough to make an LDO oscillate: a 2.2 μF ceramic demonstrated an ESR of about 15 mΩ when tested. If used as an output capacitor, this will cause instability (see ESR Curves). If a ceramic is used on the output of an LDO, a small resistance (about 1Ω) should be placed in series with the capacitor. If it is used as an input capacitor, no resistor is needed as there is no requirement for ESR on capacitors used on the input. EXTERNAL RESISTORS The output voltage is set using two external resistors (see Basic Application Circuit). It is recommended that the resistor from the ADJ pin to ground be 51.1 kΩ. The other resistor (RADJ) which connects between VOUT and the ADJ pin is selected to set VOUT as given by the formula: VOUT = VREF + (VREF x (RADJ / 51.1 kΩ)) REVERSE CURRENT PATH The PNP power transistor used as the pass element in the LP2980-ADJ has an inherent diode connected between the regulator output and input. During normal operation (where the input voltage is higher than the output) this diode is reverse biased (See Figure 21). Figure 21. LP2980–ADJ Reverse Current Path However, if the input voltage is more than a VBEbelow the output voltage, this diode will turn ON and current will flow into the regulator output. In such cases, a parasitic SCR can latch which will allow a high current to flow into the VIN pin and out the ground pin, which can damage the part. The internal diode can also be turned on if the input voltage is abruptly stepped down to a voltage which is a VBE below the output voltage. In any application where the output may be pulled above the input, an external Schottky diode must be connected from VIN to VOUT (cathode on VIN, anode on VOUT. See Figure 22), to limit the reverse voltage across the LP2980-ADJ to 0.3V (see Absolute Maximum Ratings). Figure 22. Adding External Schottky Diode Protection Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LP2980-ADJ 9 LP2980-ADJ SNVS001E – APRIL 2000 – REVISED APRIL 2013 www.ti.com ON/OFF INPUT OPERATION The LP2980-ADJ is shut off by driving the ON/OFF input low, and turned on by pulling the ON/OFF input high. If this feature is not to be used, the ON/OFF input must be tied to VIN to keep the regulator output on at all times (the ON/OFF input must not be left floating). To ensure proper operation, the signal source used to drive the ON/OFF input must be able to swing above and below the specified turn-on/turn-off voltage thresholds which specify an ON or OFF state (see Electrical Characteristics). It is also important that the turn-on (and turn-off) voltage signals applied to the ON/OFF input have a slew rate which is greater than 40 mV/μs. IMPORTANT: The ON/OFF function will not operate correctly if a slow-moving signal is used to drive the ON/OFF input. 10 Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LP2980-ADJ LP2980-ADJ www.ti.com SNVS001E – APRIL 2000 – REVISED APRIL 2013 REVISION HISTORY Changes from Revision D (April 2013) to Revision E • Page Changed layout of National Data Sheet to TI format .......................................................................................................... 10 Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LP2980-ADJ 11 PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) LP2980IM5-ADJ NRND SOT-23 DBV 5 1000 TBD Call TI Call TI -40 to 125 L06B LP2980IM5-ADJ/NOPB ACTIVE SOT-23 DBV 5 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 L06B LP2980IM5X-ADJ NRND SOT-23 DBV 5 3000 TBD Call TI Call TI -40 to 125 L06B LP2980IM5X-ADJ/NOPB ACTIVE SOT-23 DBV 5 3000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 L06B (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) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) LP2980IM5-ADJ SOT-23 DBV 5 1000 178.0 8.4 LP2980IM5-ADJ/NOPB SOT-23 DBV 5 1000 178.0 LP2980IM5X-ADJ SOT-23 DBV 5 3000 178.0 LP2980IM5X-ADJ/NOPB SOT-23 DBV 5 3000 178.0 3.2 3.2 1.4 4.0 8.0 Q3 8.4 3.2 3.2 1.4 4.0 8.0 Q3 8.4 3.2 3.2 1.4 4.0 8.0 Q3 8.4 3.2 3.2 1.4 4.0 8.0 Q3 Pack Materials-Page 1 W Pin1 (mm) Quadrant PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LP2980IM5-ADJ SOT-23 DBV 5 1000 210.0 185.0 35.0 LP2980IM5-ADJ/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP2980IM5X-ADJ SOT-23 DBV 5 3000 210.0 185.0 35.0 LP2980IM5X-ADJ/NOPB SOT-23 DBV 5 3000 210.0 185.0 35.0 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. 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