LM2832ZSD EVAL

User's Guide SNVA199A – January 2009 – Revised April 2013 AN-1553 LM2832Z 6-Pin WSON Demo Board 1 Introduction This demo board converts 3V to 5.5V input to 1.8V output for 2A load current using the LM2832Z 1.6 MHz DC-DC switching converter. This is a 4-layer board using the internal layers as a VIN plane and Ground plane. A bill of materials (Section 6) describes the parts used on this demo board. A schematic and layout have also been included, along with measured performance characteristics. The above restrictions for the input voltage are valid only for the demo board as shipped with the demo board schematic shown in Figure 1. Operating Conditions • VIN = 3V to 5.5V • VO = 1.8V • IO = 2A Vo VIND Vin C1 J1 L1 4 VINA 5 R3 EN 6 3 LM2832 SW R1 2 GND FB 1 R5 R6 R7 R8 R9 D1 C2 C3 C5 R2 Figure 1. LM2832Z 6-Pin WSON Demo Board Schematic 2 Pin-Out All trademarks are the property of their respective owners. SNVA199A – January 2009 – Revised April 2013 Submit Documentation Feedback AN-1553 LM2832Z 6-Pin WSON Demo Board Copyright © 2009–2013, Texas Instruments Incorporated 1 Pin Description 3 www.ti.com Pin Description Pin Name 1 FB Feedback pin. Connect to external resistor divider to set output voltage. 2 GND Signal and power ground pin. Place the bottom resistor of the feedback network as close as possible to this pin. 3 SW Output switch. Connect to the inductor and catch diode. 4 VIND Power Input supply. 5 VINA Control circuitry supply voltage. Connect VINA to VIND on PC board. 6 EN DAP Die Attach Pad 4 LM2832 Gain/Phase 5V to 1.8V @ 1A 2 AN-1553 LM2832Z 6-Pin WSON Demo Board Function Enable control input. Logic high enables operation. Do not allow this pin to float or be greater than VINA + 0.3V. Connect to system ground for low thermal impedance, but it cannot be used as a primary GND connection. SNVA199A – January 2009 – Revised April 2013 Submit Documentation Feedback Copyright © 2009–2013, Texas Instruments Incorporated LM2832 Efficiency: Vin = 3.3V, Vo = 1.8V www.ti.com 5 LM2832 Efficiency: Vin = 3.3V, Vo = 1.8V 6 Bill of Materials LM2832Z-Version Part ID Part Value Manufacturer U1 2A Buck Regulator Texas Instruments Part Number LM2832 C1, Input Cap 22 µF, 6.3V, X5R TDK C3216X5ROJ226M C2 Output Cap 22 µF, 6.3V, X5R TDK C3216X5ROJ226M C3 Output Cap 22 µF, 6.3V, X5R TDK C3216X5ROJ226M D1, Catch Diode 0.3Vf Schottky 1.5A, 30VR TOSHIBA CRS08 L1 1.5 µH, 2.2A CoilCraft MSS3220-152ML R1 20.0 kΩ, 1% Vishay CRCW08052002F R2 10.0 kΩ, 1% Vishay CRCW08051002F R3 20.0 kΩ, 1% Vishay CRCW08052002F J1 No Load R5 – R9 No Load SNVA199A – January 2009 – Revised April 2013 Submit Documentation Feedback AN-1553 LM2832Z 6-Pin WSON Demo Board Copyright © 2009–2013, Texas Instruments Incorporated 3 Layout 7 www.ti.com Layout Figure 2. Top Layer Figure 3. Internal Plane 1 (GND) 4 AN-1553 LM2832Z 6-Pin WSON Demo Board SNVA199A – January 2009 – Revised April 2013 Submit Documentation Feedback Copyright © 2009–2013, Texas Instruments Incorporated Layout www.ti.com Figure 4. Internal Plane 2 (VIN) Figure 5. Bottom Layer SNVA199A – January 2009 – Revised April 2013 Submit Documentation Feedback AN-1553 LM2832Z 6-Pin WSON Demo Board Copyright © 2009–2013, Texas Instruments Incorporated 5 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. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily performed. TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional restrictions. Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support that may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause harm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use of any TI components in safety-critical applications. In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and requirements. Nonetheless, such components are subject to these terms. No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties have executed a special agreement specifically governing such use. Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components which have not been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal and regulatory requirements in connection with such use. TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of non-designated products, TI will not be responsible for any failure to meet ISO/TS16949. Products Applications Audio www.ti.com/audio Automotive and Transportation www.ti.com/automotive Amplifiers amplifier.ti.com Communications and Telecom www.ti.com/communications Data Converters dataconverter.ti.com Computers and Peripherals www.ti.com/computers DLP® Products www.dlp.com Consumer Electronics www.ti.com/consumer-apps DSP dsp.ti.com Energy and Lighting www.ti.com/energy Clocks and Timers www.ti.com/clocks Industrial www.ti.com/industrial Interface interface.ti.com Medical www.ti.com/medical Logic logic.ti.com Security www.ti.com/security Power Mgmt power.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defense Microcontrollers microcontroller.ti.com Video and Imaging www.ti.com/video RFID www.ti-rfid.com OMAP Applications Processors www.ti.com/omap TI E2E Community e2e.ti.com Wireless Connectivity www.ti.com/wirelessconnectivity Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2013, Texas Instruments Incorporated