LM2685 LM2685 Dual Output Regulated Switched Capacitor Voltage Converter Literature Number: SNVS055B LM2685 Dual Output Regulated Switched Capacitor Voltage Converter General Description Features The LM2685 CMOS charge-pump voltage converter operates as an input voltage doubler, +5V regulator and inverter for an input voltage in the range of +2.85V to +6.5V. Five low cost capacitors are used in this circuit to provide up to 50mA of output current at +5V ( 5%), and 15mA at -5V. The LM2685 operates at a 130 kHz switching frequency to reduce output resistance and voltage ripple. With an operating current of only 800A (operating efficiency greater than 80% with most loads) and 6A typical shutdown current, the LM2685 is ideal for use in battery powered systems. The device is in a small 14-pin TSSOP package. +5V regulated output Inverts V05(+5V) to VNEG(-5V) Doubles input supply voltage TSSOP-14 package 80% typical conversion efficiency at 25mA Input voltage range of 2.85V to 6.5V Independent shutdown control pins Applications Cellular phones Pagers PDAs Handheld instrumentation 3.3V to 5V voltage conversion applications Typical Application and Connection Diagram 10110002 14-Pin TSSOP 10110001 Ordering Information Order Number Package Type NSC Package Drawing LM2685MTC TSSOP-14 MTC14 94 Units, Rail LM2685MTCX TSSOP-14 MTC14 2.5k Units, Tape and Reel (c) 2011 National Semiconductor Corporation Supplied As 101100 101100 Version 7 Revision 3 www.national.com Print Date/Time: 2011/09/22 14:26:35 LM2685 Dual Output Regulated Switched Capacitor Voltage Converter OBSOLETE September 22, 2011 LM2685 Pin Descriptions Pin No. Name 1 VIN Function Power supply input voltage. 2 GND Power supply ground. 3 VNEG Negative output voltage created by inverting V05. 4 VNSW VNEG output connected through a series switch, NSW. 5 CE 6 SDP Positive side shutdown input. This pin is low for normal operation and high for positive side shutdown and VPSW load disconnect. (See Shutdown and Load Disconnect section in the Detailed Device Description division). 7 SDN Negative side shutdown input. This pin is low for normal operation and high for negative side shutdown and VNSW load disconnect. (See Shutdown and Load Disconnect section in the Detailed Device Description division). 8 C2- The negative terminal of inverting charge-pump capacitor, C2. 9 C2+ The positive terminal of inverting charge-pump capacitor, C2. 10 V05 Regulated +5V output. 11 VPSW V05 output connected through a series switch, PSW. 12 VDBL Voltage Doubler Output. (2.85V VIN 5.4V. See Voltage Doubler section). 13 C1 The positive terminal of doubling charge-pump capacitor, C1. 14 C1- + Chip enable input. This pin is high for normal operation and low for shutdown. (See Shutdown and Load Disconnect section in the Detailed Device Description division). The negative terminal of doubling charge-pump capacitor, C1. www.national.com 2 101100 Version 7 Revision 3 Print Date/Time: 2011/09/22 14:26:35 If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VIN to GND or GND to VNEG) SDN, SDP, CE JA (Note 3) Operating Ambient Temp. Range Operating Junction Temp. Range Storage Temp. Range Lead Temp. (Soldering, 10 sec.) ESD Rating (Note 4) 6.8V (GND - 0.3V) to (VIN + 0.3V) V05 Continuous Output Current V05 Short-Circuit Duration to GND (Note 2) 80mA 600mW 150C 140C/W -40C to 85C -40C to 125C -65C to 150C 300C 2kV Indefinite Electrical Characteristics Limits with standard typeface apply for TJ = 25C, and limits in boldface type apply over the full temperature range. Unless otherwise specified VIN = 3.6V, C1 = C2 = C3 = C5 = 2.2F. C4 = 4.7F (Note 5) Symbol Parameter V+ Supply Voltage IQ Supply Current Conditions Min Typ Max Units 6.5 V No Load 800 1600 No Load, VIN = 6.5V 300 600 6 30 2.85 ISD Shutdown Supply Current VSD Shutdown Pin Input Voltage for CE, Logic Input High @ 6.5V SDP, SDN Logic Input Low @ 6.5V VIN = 6.5V IL (+5V) Output Current at V05 2.85V < VIN < 6.5V RO (-5V) Output Resistance at VNEG IL = 15mA (Note 6) A 2.4 V 0.8 mA 50 20 40 130 180 kHz FSW Switch Frequency PEFF Average Power Efficiency at V05 2.85V VIN 6.5V IL = 25mA to GND V05 Output Regulation 1mA < IL < 50mA, VIN = 6.5V (Note 7) 4.848 5.05 5.252 1mA < IL < 50mA, VIN = 6.5V (Note 7) 4.797 5.05 5.303 GLINE GLOAD RSW 85 Line Regulation A 82 2.85V < VIN < 3.6V 0.25 3.6V < VIN < 6.5V 0.05 Load Regulation 1mA < IL < 50mA, VIN = 6.5V 0.3 Series Switch Resistance VNEG to VNSW VIN > 2.85V 1.5 % V %/V 1.0 % V05 to VPSW 5.0 Note 1: 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. Note 2: V05 may be shorted to GND without damage. However, shorting VNEG to V05 may damage the device and must be avoided. Also, for temperature above 85C, V05 must not be shorted to GND or device may be damaged. Note 3: The maximum allowable power dissipation is calculated by using PDMAX = (TJMAX -- TA)/JA, where TJMAX is the maximum junction temperature, TA is the ambient temperature and JA is the junction-to-ambient thermal resistance of the specified package. Note 4: The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin. Note 5: In the typical operating circuit, capacitors C1 and C2 are 2.2F, 0.3 maximum ESR capacitors. Capacitors with higher ESR will increase output resistance, reduce output voltage and efficiency. Note 6: Specified output resistance includes internal switch resistance and ESR of capacitors. See the Detailed Device Description section. Note 7: The 50 mA maximum current assumes no current is drawn from VDBL pin. See Voltage Doubler section in the Detailed Device Description. 3 101100 Version 7 Revision 3 Print Date/Time: 2011/09/22 14:26:35 www.national.com LM2685 Continuous Power Dissipation (TA = 25C) (Note 3) TJMAX (Note 3) Absolute Maximum Ratings (Note 1) LM2685 Typical Performance Characteristics Unless otherwise specified, TA = 25C, VIN = 3.6V. Supply Current vs Input Voltage Supply Current vs Temperature 10110006 10110007 Efficiency vs Load Current Output Voltage (V05) vs. Load Current 10110008 10110009 V05 Voltage vs. Input Voltage Output Resistance (VNEG) vs. Temperature 10110010 10110021 www.national.com 4 101100 Version 7 Revision 3 Print Date/Time: 2011/09/22 14:26:35 Output Resistance (VDBL) vs. Temperature 10110012 10110011 Switch Frequency vs. Temperature Line Transient Response (with 5mA Load) 10110014 10110013 A: INPUT VOLTAGE: VIN = 3.2V to 6.0V, 5V/div B: OUTPUT VOLTAGE: VPSW: 100mV/div C: OUTPUT VOLTAGE: VNSW: 100mV/div V05 Load Transient Response VNSW Load Transient Response 10110015 A: LOAD CURRENT: ILOAD = 5mA to 39.6mA, 10mA/div B: OUTPUT VOLTAGE: V05: 10mV/div 10110016 A: LOAD CURRENT: ILOAD = 4.4mA to -9.4mA, 10mA/div B: OUTPUT VOLTAGE: VNSW: 50mV/div 5 101100 Version 7 Revision 3 Print Date/Time: 2011/09/22 14:26:35 www.national.com LM2685 Output Resistance (VDBL) vs. Input Voltage LM2685 VPSW and VNSW Response to CE (with 5mA Load) V05 Response to SDP (with 5mA Load) 10110018 10110017 A: CE INPUT: 5V/div B: OUTPUT VOLTAGE: VPSW: 5V/div C: OUTPUT VOLTAGE: VNSW: 5V/div A: SDP INPUT: 5V/div B: OUTPUT VOLTAGE: 5V/div VNSW Response to SDP (with 5mA Load) VNSW Response to SDN (with 5mA Load) 10110019 A: SDP INPUT: 5V/div B: OUTPUT VOLTAGE (VNSW): 5V/div 10110020 A: SDN INPUT: 5V/div B: OUTPUT VOLTAGE (VNSW): 5V/div www.national.com 6 101100 Version 7 Revision 3 Print Date/Time: 2011/09/22 14:26:35 LM2685 Detailed Device Description 10110003 FIGURE 1. Functional Block Diagram The LM2685 CMOS charge pump voltage converter operates as an input voltage doubler, +5V regulator and inverter for an input voltage in the range of +2.85V to +6.5V. It delivers maximum load currents of 50mA and 15mA for the regulated +5V and the inverted output voltages respectively, with an operating current of only 800A. It also has a typical shutdown current of 6A. All these performance qualities make the LM2685 an ideal device for battery powered systems. The LM2685 has three main functional blocks: a voltage doubler, a low dropout (LDO) regulator, and a voltage inverter. Figure 1 shows the LM2685 functional block diagram. capability to change capacitor C3 at start-up, as well as a low forward voltage to prevent the internal parasitic diode from turning on. A Schottky diode like 1N5817 can be used for most applications. If the input ramp is less than 10V/ms, a smaller schottky diode like MBR0520LT1 can be used to reduce the circuit size. VOLTAGE DOUBLER The voltage doubler stage doubles the input voltage VIN, within the range of +2.85V to +5.4V. For VIN above 5.4V, the doubler shuts off and the input voltage is passed directly to VDBL via an internal power switch. The doubler contains four large CMOS switches which are switched in a sequence to double the input supply voltage. Figure 2 illustrates the voltage conversion scheme. When S2 and S4 are closed, C1 charges to the supply voltage VIN. During this time interval, switches S1 and S3 are open. In the next time interval, S2 and S4 are opened at the same time, S1 and S3 are closed, the sum of the input voltage VIN and the voltage across C1 gives the 2VIn and the voltage across C2 gives the 2VIN at VDBL output. VDBL supplies the LDO regulator. It is recommended not to load VDBL when V05 has a load of 50mA. For proper operation, the sum of VDBL and V05 loads must not be more than 50mA. The Schottky diode D1 is only needed for start-up. The internal oscillator circuit uses the VDBL and GND pins. The voltage across them must be larger than 1.8V to ensure the operation of the oscillator. During start-up, D1 is used to charge up the voltage at VDBL pin to start the oscillator; it also protects the device from turning on its own parasitic diode and potentially latching up. The diode should have enough current carrying 10110004 FIGURE 2. Voltage Doubler Principle +5 LDO REGULATOR VDBL is the input to an LDO regulator that regulates it to a +5 output voltage at V05. VPSW is tied to V05 through a series switch PSW. The LDO output capacitor (4.7F Tantalum) may be tied to either V05 or VPSW. INVERTER From the V05 output, a -5V output is created at VNEG by means of an inverting charge pump. This negative output is unregulated, meaning that it's output will droop as the load current at VNEG increases. The inverter contains four large CMOS switches which are in a sequence to invert the input supply voltage. Figure 3 illustrates the voltage conversion 7 101100 Version 7 Revision 3 Print Date/Time: 2011/09/22 14:26:35 www.national.com LM2685 scheme. When S1 and S3 are closed, C1 charges to the supply voltage V05. During this time interval, switches S2 and S4 are open. In the second time interval, S1 and S3 are open;at the same time, S2 and S4 are closed, C1 is charging C2. After a number of cycles, the voltage cross C2 will be pumped to V05. Since the anode of C2 is connected to ground, the output at the cathode of C2 equals -(V05) when there is no load current. The output voltage drop when a load is added is determined by the parasitic resistance (Rds(on) of the MOSFET switches and the ESR of the capacitors) and the charge transfer loss between capacitors. where RSW is the sum of the ON resistance of the internal MOSFET switches as shown in Figure 2. The peak-to-peak output voltage ripple is determined by the oscillator frequency, the capacitance and ESR of the capacitor C3. High capacitance (2.2F to higher), low ESR capacitors can reduce the output resistance and the voltage ripple. where IQ(V+) is the quiescent power loss of the IC device, and I2LR is the conversion loss associated with the switch on-resistance, the two external capacitors and their ESRs. Low ESR capacitors (table to be referenced) are recommended to maximize efficiency, reduce the output voltage drop and voltage ripple. +5 LDO REGULATOR EXTERNAL CAPACITORS The voltage doubler output capacitor, C3, serves as the input capacitor of the +5 LDO regulator. The output capacitor C4, must meet the requirement for minimum amount of capacitance and appropriate ESR (Equivalent Serving Resistance) for proper operation. The ESR value must remain within the regions of stability as shown in Figure 4, Figure 5 and Figure 6 to ensure output's stability. A minimum capacitance of 1F is required at the output. This can be increased without limit, but a 4.7F tantalum capacitor is recommended for loads ranging upto the maximum specification. With lighter loads of less or equal to 10mA, ceramic capacitor of at least 1F and ESR in the milliohms can be used. This has to be connected to VPSW pin instead of the V05 pin. Any output capacitor used should have a good tolerance over temperature for capacitance and ESR values. The larger the capacitor, with ESR within the stable region, the better the stability and noise performance. 10110005 FIGURE 3. Voltage Inverter Principle SHUTDOWN AND LOAD DISCONNECT In addition to the nominal charge pump and regulator functions, the LM2685 features shutdown and load disconnect circuitry. CE (chip enable) and SDP (shutdown positive) perform the same task with opposite input polarities. When CE is low or SDP is high, all circuit blocks are disabled and V05 falls to ground potential. This is the same result as when the die temperature exceeds 150C (typical), and the device's internal thermal shutdown is triggered. Forcing SDN (shutdown negative) high disables only the inverting charge pump. The doubling charge pump and the LDO regulator continue to operate, so the V05 and the VPSW remain at 5V. The LM2685 incorporates two low impedance switches tied to the V05 and VNEG outputs, because some special applications require load disconnect and this is achievable via the switches. Switch PSW connects V05 to VPSW, and switch NSW connects VNEG to VNSW. In normal operation, these switches are closed, allowing 5V loads to be tied to either V05 or VPSW and -5V loads to be tied to either VNEG or VNSW. Driving SDN high opens switch NSW only, while forcing CE low or SDP high, opens both the PSW and NSW. Application Information CAPACITOR SELECTION The output resistance and ripple voltage are dependent on the capacitance and ESR values of the external capacitors. VOLTAGE DOUBLER EXTERNAL CAPACITORS The selection of capacitors are based on the specifications of the dropout voltage (which equals IOUT ROUT), the output voltage ripple, and the converter efficiency. www.national.com 10110025 FIGURE 4. ESR Curve for COUT = 2.2F 8 101100 Version 7 Revision 3 Print Date/Time: 2011/09/22 14:26:35 10110026 FIGURE 5. ESR Curve for COUT = 4.7F 10110027 FIGURE 6. ESR Curve for COUT =10F 9 101100 Version 7 Revision 3 Print Date/Time: 2011/09/22 14:26:35 www.national.com LM2685 INVERTER EXTERNAL CAPACITORS As discussed in the +5 LDO Regulator External Capacitors section, the output resistance and ripple voltage are dependent on the capacitance and ESR values of the external capacitors. A minimum of 1F capacitor with good tolerance over temperature for capacitance and ESR values. The capacitance value can be increased without limit while still maintain high low ESR value. 2.2F capacitors are recommended for the two external capacitors, C2 and C5 of the inverter. LM2685 Physical Dimensions inches (millimeters) unless otherwise noted TSSOP-14 Package 14-Lead Thin Shrink Small-Outline Package For Ordering, Refer to Ordering Information Table NS Package Number MTC14 www.national.com 10 101100 Version 7 Revision 3 Print Date/Time: 2011/09/22 14:26:35 LM2685 Notes 11 101100 Version 7 Revision 3 Print Date/Time: 2011/09/22 14:26:35 www.national.com LM2685 Dual Output Regulated Switched Capacitor Voltage Converter Notes For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Design Support Amplifiers www.national.com/amplifiers WEBENCH(R) Tools www.national.com/webench Audio www.national.com/audio App Notes www.national.com/appnotes Clock and Timing www.national.com/timing Reference Designs www.national.com/refdesigns Data Converters www.national.com/adc Samples www.national.com/samples Interface www.national.com/interface Eval Boards www.national.com/evalboards LVDS www.national.com/lvds Packaging www.national.com/packaging Power Management www.national.com/power Green Compliance www.national.com/quality/green Switching Regulators www.national.com/switchers Distributors www.national.com/contacts LDOs www.national.com/ldo Quality and Reliability www.national.com/quality LED Lighting www.national.com/led Feedback/Support www.national.com/feedback Voltage References www.national.com/vref Design Made Easy www.national.com/easy www.national.com/powerwise Applications & Markets www.national.com/solutions Mil/Aero www.national.com/milaero PowerWise(R) Solutions Serial Digital Interface (SDI) www.national.com/sdi Temperature Sensors www.national.com/tempsensors SolarMagicTM www.national.com/solarmagic PLL/VCO www.national.com/wireless www.national.com/training PowerWise(R) Design University THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION ("NATIONAL") PRODUCTS. NATIONAL MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY OR COMPLETENESS OF THE CONTENTS OF THIS PUBLICATION AND RESERVES THE RIGHT TO MAKE CHANGES TO SPECIFICATIONS AND PRODUCT DESCRIPTIONS AT ANY TIME WITHOUT NOTICE. NO LICENSE, WHETHER EXPRESS, IMPLIED, ARISING BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT. TESTING AND OTHER QUALITY CONTROLS ARE USED TO THE EXTENT NATIONAL DEEMS NECESSARY TO SUPPORT NATIONAL'S PRODUCT WARRANTY. EXCEPT WHERE MANDATED BY GOVERNMENT REQUIREMENTS, TESTING OF ALL PARAMETERS OF EACH PRODUCT IS NOT NECESSARILY PERFORMED. NATIONAL ASSUMES NO LIABILITY FOR APPLICATIONS ASSISTANCE OR BUYER PRODUCT DESIGN. BUYERS ARE RESPONSIBLE FOR THEIR PRODUCTS AND APPLICATIONS USING NATIONAL COMPONENTS. PRIOR TO USING OR DISTRIBUTING ANY PRODUCTS THAT INCLUDE NATIONAL COMPONENTS, BUYERS SHOULD PROVIDE ADEQUATE DESIGN, TESTING AND OPERATING SAFEGUARDS. EXCEPT AS PROVIDED IN NATIONAL'S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, NATIONAL ASSUMES NO LIABILITY WHATSOEVER, AND NATIONAL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY RELATING TO THE SALE AND/OR USE OF NATIONAL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS PRIOR WRITTEN APPROVAL OF THE CHIEF EXECUTIVE OFFICER AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: Life support devices or systems are devices which (a) are intended for surgical implant into the body, or (b) support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness. National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. Copyright(c) 2011 National Semiconductor Corporation For the most current product information visit us at www.national.com National Semiconductor Americas Technical Support Center Email: support@nsc.com www.national.com Tel: 1-800-272-9959 National Semiconductor Europe Technical Support Center Email: europe.support@nsc.com 101100 Version 7 Revision 3 National Semiconductor Asia Pacific Technical Support Center Email: ap.support@nsc.com Print Date/Time: 2011/09/22 14:26:35 National Semiconductor Japan Technical Support Center Email: jpn.feedback@nsc.com IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI's terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information published by TI regarding third-party products or services does not constitute a license from TI 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 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. Reproduction of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional restrictions. Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. TI products are not authorized for 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, unless officers of the parties have executed an agreement specifically governing such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in such safety-critical applications. TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use. TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated products in automotive applications, TI will not be responsible for any failure to meet such requirements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions: Products Applications Audio www.ti.com/audio Communications and Telecom www.ti.com/communications Amplifiers amplifier.ti.com Computers and Peripherals www.ti.com/computers Data Converters dataconverter.ti.com Consumer Electronics www.ti.com/consumer-apps DLP(R) Products www.dlp.com Energy and Lighting www.ti.com/energy DSP dsp.ti.com Industrial www.ti.com/industrial Clocks and Timers www.ti.com/clocks Medical www.ti.com/medical Interface interface.ti.com Security www.ti.com/security Logic logic.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defense Power Mgmt power.ti.com Transportation and Automotive www.ti.com/automotive Microcontrollers microcontroller.ti.com Video and Imaging RFID www.ti-rfid.com OMAP Mobile Processors www.ti.com/omap Wireless Connectivity www.ti.com/wirelessconnectivity TI E2E Community Home Page www.ti.com/video e2e.ti.com Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright (c) 2011, Texas Instruments Incorporated