skyworks solutions, inc. ? phone [ 781] 376-3000 ? fax [781] 376-3100 ? sales@ skyworksinc.com ? www.skyworksinc.com 203141a ? skyworks proprietary information ? products and product in formation are subject to change without notice ? feb ruary 27, 2014 1 product summary SKY87202: 3.5 a constant on-time, step-down dc-dc converter applications ? portable devices ? access points ? set top boxes features ? input voltage range: 2.7 v to 6.0 v ? two output voltage options: ? adjustable output voltage: 0.6 v to 3.3 v (SKY87202-11) ? fixed output voltage: 1.2 v (SKY87202-12) ? up to 3.5 a continuous output current ? switching frequency: 1.2 mhz ? 95% peak efficiency ? typical switch on resistance: 50 m ? pmos, 40 m ? nmos ? 80% light load efficiency ? power sequencing ? cycle-by-cycle over-current protection ? over-temperature protection ? control loop stabilization with low esr ceramic capacitors ? soft start ? low profile, qfn (12-pin, 2 mm ? 2 mm) package (msl1, 260 ? c per jedec j-std-020) description the SKY87202 is a 1.2 mhz, 3.5 a constant on-time, synchronous step-down dc-dc converter. the device provides an output voltage from 0.6 v to 3.3 v from input voltage ranging from 2.7 v to 6.0 v, while keeping excellent line and load regulation and maximizing input efficiency. the constant on-time control allows easy loop stabilization with minimal external components while providing fast transient response. power sequencing is controlled by the en and pg pins. the SKY87202 has cycle-by-cycle current limits and thermal shutdown to protect against fault conditions. the SKY87202 is available in a 12-pin, 2 mm ? 2 mm quad flat no-lead (qfn) package. a typical application circuit is shown in figure 1. the pin configuration and packages are shown in figure 2. a functional block diagram of the SKY87202 is shown in figure 3. s kywork s g reen? product s are compliant with all applicable legi s lation and are halogen-free. for additional information, refer to skyworks de?ition of green , document number s q04-0074. 1 pvin a g nd p g nd vin en p g t0281 n c fb/n c out lx 10 8 9 5 7 6 2, 11 43, 12 input voltage 2.7 v to 6 v enable power g ood output voltage 1.2 v c 1 r1 r2 c 2 22 f 22 f 1 h 57. 6 k 57. 6 k SKY87202 l1 figure 1. typical application circuit free datasheet http://www.datasheetlist.com/
product summary ? sky 8 7202 step-down dc-dc converter skyworks solutions, inc. ? phone [ 781] 376-3000 ? fax [781] 376-3100 ? sales@ skyworksinc.com ? www.skyworksinc.com 2 february 27, 2014 ? skyworks proprietary and confidential information ? products and product information are subject to c hange without notice ? 203141a # s3184 1 pvin lx lx p g nd p g nd a g nd p g en fb/n c out n c vin 2 3 4 5 10 11 12 9 8 7 6 figure 2. SKY87202-11/-12 pinout C 12-pin qfn packages (top view) en fb/n c out pwm c ontrol and logic driver h sg l sg s w h s mo s fet l s mo s fet c urrent limit c omparator di s continuou s c onduction mode c omparator r damp v ref f s et 0. 66 v 200 k 200 k 0.54 v v out di s charge C + C + C + C + C + c omp voltage reference s and uvlo ramp c ircuit internal fb for ?xed output voltage + vin pvin lx p g nd p g t0279 figure 3. SKY87202 functional block diagram free datasheet http://www.datasheetlist.com/
product summary ? sky 8 7202 step-down dc-dc converter skyworks solutions, inc. ? phone [ 781] 376-3000 ? fax [781] 376-3100 ? sales@ skyworksinc.com ? www.skyworksinc.com 203141a ? skyworks proprietary information ? products and product in formation are subject to change without notice ? feb ruary 27, 2014 3 ordering information model name manufacturing part number evaluation board part number SKY87202 step-down dc-dc converter SKY87202-11-631lf (variable output voltage) SKY87202-11-631lf-evb SKY87202-12-631lf (fixed 1.2 v out put voltage) SKY87202-12-631lf-evb copyright ? 2012-2014 skyworks solutions, inc. all rights reserved. information in this document is provided in connection with skyw orks solutions, inc. (skyworks) products or services. these m aterials, including the information co ntained herein, are provided by skyworks as a service to its customers and may be used for info rmational purposes only by the cu stomer. skyworks assumes no res ponsibility for errors or omissions in these materials or the information contained herein. skyworks may change its documentat ion, products, services, specific ations or product descriptions at any time, without notice. skyworks makes no commitment to update the materials or information and shall have no responsi bility whatsoever for conflicts, incompatibilities, or other diff iculties arising from any future changes. no license, whether express, implied, by es toppel or otherwise, is granted to any in tellectual property rights by this document . skyworks assumes no liability for any materials, products or information provided hereunder, including the sale, distribution, re production or use of skyworks products, information or mate rials, except as may be provided in skyworks terms and conditions of sale. the materials, products and information are pr ovided as is without warranty of any ki nd, whether express, implied, statutory, or otherwise, including fitness for a particular purpose or use, merchantability, performance, qualit y or non-infringement of any intellectual property right; all su ch warranties are hereby expressly disclaimed. skyworks does not warrant the accura cy or completeness of the information, text, graphics or other items contained within these ma terials. skyworks shall not be liable for any damages, including but not limited to any special, indirect, incidental, statutory, or consequentia l damages, including without limitation, lost revenues or lost profits that may result from the use of the materials or information, wheth er or not the recipient of mat erials has been advised of the possibility of such damage. skyworks products are no t intended for use in medical, lifesaving or life-su staining applications, or other equipment in which the failure of the skyworks products could lead to personal injury, death, physical or environmental damage. skyw orks customers using or selli ng skyworks products for use in such applications do so at their own risk and agree to fully indemnify skyworks for any damages resulting from such improper use or sale. customers are responsible for their products and applications us ing skyworks products , which may deviate from published specifi cations as a result of design de fects, errors, or operation of products outside of published pa rameters or design specifications. customers sh ould include design and operating safeguards to minimize these and other risks. skyworks assumes no liability for applications assistance, customer product de sign, or damage to any equipment resulting from the use of skyw orks products outsid e of stated published specifications or parameters. skyworks, the skyworks symbol, a nd breakthrough simplicity are trademarks or registered tradem arks of skyworks solutions, inc ., in the united states and othe r countries. third-party brands and names are for identification purposes only, and are the proper ty of their respective owners. additional information, includ ing relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. free datasheet http://www.datasheetlist.com/
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