TPS7A3721EVM-529

User's Guide SLVU850 – December 2012 TPS7A37xxEVM-529 Evaluation Module This user’s guide describes the operational use of the TPS7A37xxEVM-529 Evaluation Module (EVM) as a reference design for engineering demonstration and evaluation of the TPS7A37xx, 1% overall accuracy low dropout linear regulator (LDO). Included in this user’s guide are setup instructions, a schematic diagram, layout, thermal guidelines, a bill of materials. 1 2 3 4 5 6 7 Contents Introduction .................................................................................................................. Setup ......................................................................................................................... 2.1 Input/Output Connectors and Jumper Descriptions ........................................................... Operation ..................................................................................................................... Thermal Guidelines and Layout Recommendations ................................................................... Board Layout ................................................................................................................ TPS7A37xxEVM-529 Schematic .......................................................................................... Bill of Material ............................................................................................................... 1 2 2 2 3 4 6 7 List of Figures 1 Assembly Layer ............................................................................................................. 4 2 Top Layer Routing .......................................................................................................... 5 3 Bottom Layer Routing ...................................................................................................... 5 4 TPS7A37xxEVM-529 Schematic.......................................................................................... 6 List of Tables 1 1 Thermal Resistance, θJA, and Maximum Power Dissipation........................................................... 3 2 TPS7A37xxEVM-529 Bill of Material ..................................................................................... 7 Introduction The Texas Instruments TPS7A37xxEVM-529 EVM helps design engineers evaluate the operation and performance of the TPS7A37xx family of linear regulators for possible use in their own circuit application. This particular EVM configuration contains a single linear regulator with ultra low dropout, excellent transient response, and high output voltage accuracy in a small 2 mm × 2 mm DRV package. The regulator is capable of delivering up to 1 A to the load depending on the input-output power dissipation across the part which can be minimized because of the low dropout voltage. SLVU850 – December 2012 Submit Documentation Feedback TPS7A37xxEVM-529 Evaluation Module Copyright © 2012, Texas Instruments Incorporated 1 Setup 2 www.ti.com Setup This section describes the jumpers and connectors on the EVM as well as how to properly connect, setup, and use the TPS7A37xxEVM-529. 2.1 Input/Output Connectors and Jumper Descriptions 2.1.1 J1 – VIN Input power supply voltage connector. Twist the positive input lead and ground return lead from the input power supply and keep them as short as possible to minimize EMI transmission. Add additional bulk capacitance between J1 and J2, if the supply leads are greater than six inches. For example, an additional 47-µF electrolytic capacitor connected from J1 to ground can improve the transient response of the TPS7A37xx while eliminating unwanted ringing on the input, due to long wire connections. 2.1.2 J2 – GND Return connector for the input power supply. 2.1.3 J3 – GND Output ground return connector. 2.1.4 J4 – OUT Regulated output voltage connector. 2.1.5 JP1 – EN Output enable. To enable the output, connect a jumper to short the VIN pin 1 to the EN center pin 2. To disable the output, connect a jumper to short EN pin 2 to GND pin3. Do not leave EN floating during operation. 2.1.6 Soldering Guidelines Any solder re-work to modify the EVM for the purpose of repair or other application reasons must be performed using a hot-air system to avoid damaging the integrated circuit (IC). 2.1.7 Equipment Interconnect Set the input power supply to 5.5 V(max). Turn the power supply off. Connect the positive voltage lead from input power supply to VIN, at the J1 connector of the EVM. Connect the ground lead from the input power supply to GND at the J2 connector of the EVM. • Connect a 0- to 1-A load between the output, OUT, at connector J4, and ground, GND, at connector J3. • Disable the output by jumping JP1, the EN pin to the OFF pin. • 3 Operation • • • 2 Turn on the power supply. Enable the output by jumping JP1, the EN pin to the ON pin. Vary the respective load and input voltage, as necessary, for test purposes. TPS7A37xxEVM-529 Evaluation Module Copyright © 2012, Texas Instruments Incorporated SLVU850 – December 2012 Submit Documentation Feedback Thermal Guidelines and Layout Recommendations www.ti.com 4 Thermal Guidelines and Layout Recommendations Thermal management is a key component in the design of any power converter and is especially important when the power dissipation in the LDO is high. Use the following formula to approximate the maximum power dissipation for the particular ambient temperature: TJ = TA + PD × θJA (1) Where TJ is the junction temperature, TA is the ambient temperature, PD is the power dissipation in the device (Watts), and θJA is the thermal resistance from junction to ambient. All temperatures are in degrees Celsius. The maximum operating junction temperature, TJ, must not be allowed to exceed 125°C. The layout design must be copper trace and plane areas smartly, as thermal sinks, in order not to allow TJ to exceed the absolute maximum rating under all temperature conditions and voltage conditions across the part. Table 1 repeats information from the dissipation ratings table of the TPS7A37xx series datasheet for comparison with the thermal resistance, θJA, for High-K JEDEC standard boards. The maximum input voltage can be calculated for full loads at different ambient temperatures. The input voltage must be less than these values in order to maintain a safe junction temperature. Table 1. Thermal Resistance, θJA, and Maximum Power Dissipation IC Board Package θJA Max Vin at 1 A (TA = 25°C) Max Vin at 1 A (TA = 70°C) TPS7A3721 High-K DRV 67.2°C/W 3.58 V 2.91 V SLVU850 – December 2012 Submit Documentation Feedback TPS7A37xxEVM-529 Evaluation Module Copyright © 2012, Texas Instruments Incorporated 3 Board Layout 5 www.ti.com Board Layout Figure 1 to Figure 3 are the PCB layouts for this EVM. Figure 1. Assembly Layer 4 TPS7A37xxEVM-529 Evaluation Module Copyright © 2012, Texas Instruments Incorporated SLVU850 – December 2012 Submit Documentation Feedback Board Layout www.ti.com Figure 2. Top Layer Routing Figure 3. Bottom Layer Routing SLVU850 – December 2012 Submit Documentation Feedback TPS7A37xxEVM-529 Evaluation Module Copyright © 2012, Texas Instruments Incorporated 5 TPS7A37xxEVM-529 Schematic 6 www.ti.com TPS7A37xxEVM-529 Schematic Figure 4 shows the schematic for this EVM. Figure 4. TPS7A37xxEVM-529 Schematic 6 TPS7A37xxEVM-529 Evaluation Module Copyright © 2012, Texas Instruments Incorporated SLVU850 – December 2012 Submit Documentation Feedback Bill of Material www.ti.com 7 Bill of Material Table 2 is the BOM for TPS7A37xxEVM-529 Table 2. TPS7A37xxEVM-529 Bill of Material Designator Description Manufacturer PartNumber Quantity !PCB Printed Circuit Board Any PWR529 1 C1, C4 CAP, CERM, 10uF, 10V, +10/%, X5R, 0805 MuRata GRM21BR61A106KE19L 2 C2 CAP, CERM, 0.01uF, 50V, +10/%, X7R, 0603 TDK C1608X7R1H103K 1 FID1, FID2, FID3 Fiducial mark. There is nothing to buy or mount. N/A N/A 3 J1, J2, J3, J4 Header, TH, 100mil, 2x1, Gold plated, 230 mil above insulator Samtec, Inc. TSW-102-07-G-S 4 JP1 Header, TH, 100mil, 3x1, Gold plated, 230 mil above insulator Samtec, Inc. TSW-103-07-G-S 1 LBL1 Thermal Transfer Printable Brady Labels, 1.000" W x 0.250" H - 10,000 per roll THT-14-423-10 1 SH-JP1 Shunt, 100mil, Gold plated, Black Samtec, Inc. SNT-100-BK-G 1 U1 2.1V 1% Accuracy 1A LowDropout Regulator with Reverse Current Protection Texas Instruments TPS7A3721DRV 1 C3 CAP, CERM, 100pF, 50V, +5/%, C0G/NP0, 0603 TDK C1608C0G1H101J 0 R1 RES, 28.0k ohm, 0.1%, 0.1W, 0603 Yageo America RT0603BRD0728KL 0 R2 RES, 56.2k ohm, 0.5%, 0.1W, 0603 Yageo America RT0603DRE0756K2L 0 SLVU850 – December 2012 Submit Documentation Feedback TPS7A37xxEVM-529 Evaluation Module Copyright © 2012, Texas Instruments Incorporated 7 EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions: The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods. Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING LIMITED WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. Please read the User's Guide and, specifically, the Warnings and Restrictions notice in the User's Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For additional information on TI's environmental and/or safety programs, please visit www.ti.com/esh or contact TI. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. REGULATORY COMPLIANCE INFORMATION As noted in the EVM User’s Guide and/or EVM itself, this EVM and/or accompanying hardware may or may not be subject to the Federal Communications Commission (FCC) and Industry Canada (IC) rules. For EVMs not subject to the above rules, this evaluation board/kit/module is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end product fit for general consumer use. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC or ICES-003 rules, which are designed to provide reasonable protection against radio frequency interference. Operation of the equipment may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. General Statement for EVMs including a radio User Power/Frequency Use Obligations: This radio is intended for development/professional use only in legally allocated frequency and power limits. Any use of radio frequencies and/or power availability of this EVM and its development application(s) must comply with local laws governing radio spectrum allocation and power limits for this evaluation module. It is the user’s sole responsibility to only operate this radio in legally acceptable frequency space and within legally mandated power limitations. Any exceptions to this are strictly prohibited and unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory authorities, which is responsibility of user including its acceptable authorization. For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant Caution This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. FCC Interference Statement for Class A EVM devices This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. For EVMs annotated as IC – INDUSTRY CANADA Compliant This Class A or B digital apparatus complies with Canadian ICES-003. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Concerning EVMs including radio transmitters This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Concerning EVMs including detachable antennas Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication. This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device. Cet appareil numérique de la classe A ou B est conforme à la norme NMB-003 du Canada. Les changements ou les modifications pas expressément approuvés par la partie responsable de la conformité ont pu vider l’autorité de l'utilisateur pour actionner l'équipement. Concernant les EVMs avec appareils radio Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement. Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante. Le présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de l'émetteur. SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER 【Important Notice for Users of this Product in Japan】 】 This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product: 1. 2. 3. Use this product in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for Enforcement of Radio Law of Japan, Use this product only after you obtained the license of Test Radio Station as provided in Radio Law of Japan with respect to this product, or Use of this product only after you obtained the Technical Regulations Conformity Certification as provided in Radio Law of Japan with respect to this product. Also, please do not transfer this product, unless you give the same notice above to the transferee. Please note that if you could not follow the instructions above, you will be subject to penalties of Radio Law of Japan. Texas Instruments Japan Limited (address) 24-1, Nishi-Shinjuku 6 chome, Shinjuku-ku, Tokyo, Japan http://www.tij.co.jp 【ご使用にあたっての注】 本開発キットは技術基準適合証明を受けておりません。 本製品のご使用に際しては、電波法遵守のため、以下のいずれかの措置を取っていただく必要がありますのでご注意ください。 1. 2. 3. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用いただく。 実験局の免許を取得後ご使用いただく。 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 　　　上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・インスツルメンツ株式会社 東京都新宿区西新宿６丁目２４番１号 西新宿三井ビル http://www.tij.co.jp SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER EVALUATION BOARD/KIT/MODULE (EVM) WARNINGS, RESTRICTIONS AND DISCLAIMERS For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished electrical equipment and not intended for consumer use. It is intended solely for use for preliminary feasibility evaluation in laboratory/development environments by technically qualified electronics experts who are familiar with the dangers and application risks associated with handling electrical mechanical components, systems and subsystems. It should not be used as all or part of a finished end product. Your Sole Responsibility and Risk. You acknowledge, represent and agree that: 1. 2. 3. 4. You have unique knowledge concerning Federal, State and local regulatory requirements (including but not limited to Food and Drug Administration regulations, if applicable) which relate to your products and which relate to your use (and/or that of your employees, affiliates, contractors or designees) of the EVM for evaluation, testing and other purposes. You have full and exclusive responsibility to assure the safety and compliance of your products with all such laws and other applicable regulatory requirements, and also to assure the safety of any activities to be conducted by you and/or your employees, affiliates, contractors or designees, using the EVM. Further, you are responsible to assure that any interfaces (electronic and/or mechanical) between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard. You will employ reasonable safeguards to ensure that your use of the EVM will not result in any property damage, injury or death, even if the EVM should fail to perform as described or expected. You will take care of proper disposal and recycling of the EVM’s electronic components and packing materials. Certain Instructions. It is important to operate this EVM within TI’s recommended specifications and environmental considerations per the user guidelines. Exceeding the specified EVM ratings (including but not limited to input and output voltage, current, power, and environmental ranges) may cause property damage, personal injury or death. If there are questions concerning these ratings please contact a TI field representative prior to connecting interface electronics including input power and intended loads. Any loads applied outside of the specified output range may result in unintended and/or inaccurate operation and/or possible permanent damage to the EVM and/or interface electronics. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than 60°C as long as the input and output are maintained at a normal ambient operating temperature. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors which can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during normal operation, please be aware that these devices may be very warm to the touch. As with all electronic evaluation tools, only qualified personnel knowledgeable in electronic measurement and diagnostics normally found in development environments should use these EVMs. Agreement to Defend, Indemnify and Hold Harmless. You agree to defend, indemnify and hold TI, its licensors and their representatives harmless from and against any and all claims, damages, losses, expenses, costs and liabilities (collectively, "Claims") arising out of or in connection with any use of the EVM that is not in accordance with the terms of the agreement. This obligation shall apply whether Claims arise under law of tort or contract or any other legal theory, and even if the EVM fails to perform as described or expected. Safety-Critical or Life-Critical Applications. If you intend to evaluate the components for possible use in safety critical applications (such as life support) where a failure of the TI product would reasonably be expected to cause severe personal injury or death, such as devices which are classified as FDA Class III or similar classification, then you must specifically notify TI of such intent and enter into a separate Assurance and Indemnity Agreement. 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