LM3210TLX/NOPB

1.25A Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers General Description Features The LM3210 is a DC-DC converter optimized for powering RF power amplifiers (PAs) from a single Lithium-Ion cell. However, it may be used in many other applications. It steps down an input voltage in the range from 2.7V to 5.5V to an adjustable output voltage of 0.5V to 3.6V. Output voltage is set by using a VCON analog input to control power levels and efficiency of the RF PA. The LM3210 offers superior performance for mobile phones and similar RF PA applications. Fixed-frequency PWM operation minimizes RF interference. A shutdown function turns the device off and reduces battery consumption to 0.01 µA (typ.). Only three small external surface-mount components, an inductor and two ceramic capacitors, are required. Notice: This document is not a full datasheet. For more information regarding this product or to order samples please contact your local National Semiconductor sales office or visit http://www.national.com/support/dir.html ■ ■ ■ ■ ■ ■ ■ Operates from a single Li-Ion cell (2.7V to 5.5V) Adjustable Output Voltage (0.5V to 3.6V) Fast Output Voltage Transient (0.5V to 2.7V in 30 µs max) 1.25A Maximum load capability High Efficiency Current Overload Protection Thermal Overload Protection Applications ■ ■ ■ ■ Cellular Phones Hand-Held Radios RF PC Cards Battery Powered RF Devices Typical Applications 30024902 30024934 © 2009 National Semiconductor Corporation 300249 www.national.com LM3210 – PRODUCT BRIEF June 1, 2009 LM3210 PRODUCT BRIEF LM3210 For detailed datasheet or samples, please contact National Semiconductor sales. Pin Identification 30024956 Package Mark — Top View Order Information Order Number Package Marking (Note) Supplied As LM3210TLE XVS/55 250 units, Tape-and-Reel LM3210TLX XVS/55 1000 units, Tape-and-Reel Note: The actual physical placement of the package marking will vary from part to part. The package marking “X” designates the date code. “V” is an NSC internal code for die traceability. Both will vary in production. “S” designates device type as switcher and “55” identifies the device (part number). www.national.com 2 LM3210 3 www.national.com LM3210 – PRODUCT BRIEF Notes For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Design Support Amplifiers www.national.com/amplifiers WEBENCH® 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 Reference www.national.com/vref Design Made Easy www.national.com/easy www.national.com/powerwise Solutions www.national.com/solutions Mil/Aero www.national.com/milaero PowerWise® Solutions Serial Digital Interface (SDI) www.national.com/sdi Temperature Sensors www.national.com/tempsensors SolarMagic™ www.national.com/solarmagic Wireless (PLL/VCO) www.national.com/wireless www.national.com/training PowerWise® Design University THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. 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