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xlsemi datasheet 2.1a 100khz 90v buck dc to dc converter XL7056 rev 1.2 www.xlsemi.com 1 features ? operation voltage from 8v to 80v ? maximum duty cycle up to 85% ? minimum drop out 2.0v ? adjust vout from 1.25v to 20v ? max. iout=2.1a at vout=5v ? max. iout=1.2a at vout=15v ? fixed 100khz switching frequency ? max. output power less than 20w ? internal optimize hv power mosfet ? high efficiency up to 93% ? excellent line and load regulation ? built in current limit function ? built in output short protection function ? to263-7l package applications ? ebike controller power supply ? telecom / networking equipment general description the XL7056 is a 100khz fixed frequency pwm buck (step-down) dc/dc converter, capable of driving a 2.1a load with high efficiency, low ripple and excellent line and load regulation. requiring a minimum number of external components, the regulator is simple to use and include internal frequency compensation and a fixed-frequency oscillator. the pwm control circuit is able to adjust the duty ratio linearly from 0 to 85%. figure1. package type of XL7056
xlsemi datasheet 2.1a 100khz 90v buck dc to dc converter XL7056 rev 1.2 www.xlsemi.com 2 pin configurations figure2. pin configuration of XL7056 (top view) table 1 pin description pin number pin name description 1 gnd ground pin. care must be taken in layout. this pin should be placed outside of the schottky diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into XL7056. 2 fb feedback pin (fb). through an external resistor divider network, feedback senses the ou tput voltage a nd regulates it. the feedback threshold voltage is 1.25v. 3 csn current sense negative terminal. 4 sw power switch output pin (sw). ou tput is the switch node that supplies power to the output. the metal is sw. 5 csp current sense positive terminal. 6 vc internal voltage regulator bypa ss capacity. in typical system application, the vc pin connect a 1uf capacitor to vin. 7 vin supply voltage input pin. XL7056 operates from 8v to 80v dc voltage. bypass vin to gnd with a suitably larg e capacitor to eliminate noise on the input.
xlsemi datasheet 2.1a 100khz 90v buck dc to dc converter XL7056 rev 1.2 www.xlsemi.com 3 function block figure3. function block diagram of XL7056 typical application circuit XL7056 l1 100uh/3a cin 100uf /100v c2 105 r2 10k 1% r1 3.3k 1% d1 fsv10150 sw fb gnd vin vin 10v~80v 7 4 2 1 cff 10nf cout 220uf /16v r3 0.035 1% c1 104 vout 5v/0~2.1a input 10v~80v output 5v/0~2.1a vout=1.25*(1+r2/r1) csp 5 3 csn cc 105 vc 6 r3 for limit maximum output current, r3 choose 0.035ohm in vout 5v application; r3 choose 0.055ohm in vout>5v application. figure4. XL7056 typical application circuit
xlsemi datasheet 2.1a 100khz 90v buck dc to dc converter XL7056 rev 1.2 www.xlsemi.com 4 ordering information order information marking id package type packing type supplied as XL7056e1 XL7056e1 to263-7l 800 units on tape & reel xlsemi pb-free products, as designated with ?e1? suffix in the par number, are rohs compliant. absolute maximum ratings note1 parameter symbol value unit vin pin voltage v in -0.3 to 90 v fb pin voltage v fb -0.3 to 5 v sw pin voltage v sw -0.3 to vin v power dissipation p d internally limited mw thermal resistance (to263-7l) (junction to ambient, no heatsink, free air) r ja 30 oc/w maximum junction temperature t j -40 to 150 oc operating junction temperature t j -40 to 125 oc storage temperature t stg -65 to 150 oc lead temperature (soldering, 10 sec) t lead 260 oc esd (hbm) >3000 v note1: stresses greater than those listed under maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions above those in dicated in the operation is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability.
xlsemi datasheet 2.1a 100khz 90v buck dc to dc converter XL7056 rev 1.2 www.xlsemi.com 5 XL7056 electrical characteristics t a = 25 ;unless otherwise specified. symbol parameter test co ndition min. typ. max. unit system parameters test circuit figure4 vfb fb voltage vin =20v to 80v vout=15v iload=0.5a 1.225 1.25 1.275 v ? efficiency vin=24v, vout=15v iout=1.2a - 95 - % ? efficiency vin=36v, vout=15v iout=1.2a - 94 - % ? efficiency vin=48v, vout=15v iout=1.2a - 93 - % ? efficiency vin=60v, vout=15v iout=1.2a - 92 - % ? efficiency vin=72v, vout=15v iout=1.2a - 91 - % electrical characteristics (dc parameters) vin = 48v, gnd=0v, vin & gnd parallel connect a 47uf/100v capacitor; iout=0.2a, t a = 25 ; the others floating unless otherwise specified. parameters symbol test condition min. typ. max. unit input operation voltage vin 80 v vin uvlo vin_uvlo 6 v quiescent supply current i q v fb =2v 2.1 5 ma oscillator frequency fosc 75 100 135 khz switch current limit i l v fb =0, r3=0.035 2.3 a output power pmos rdson v in =48v, i sw =1.0a 260 mohm
xlsemi datasheet 2.1a 100khz 90v buck dc to dc converter XL7056 rev 1.2 www.xlsemi.com 6 typical performance characteristics -50 -25 0 25 50 75 100 125 0 1 2 3 4 5 quiescent supply current vs temperature quiescent supply current(ma) temperature() vin=48v figure5. quiescent current curve -50 -25 0 25 50 75 100 125 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 feedback voltage change vs temperature feedback voltage change(%) temperature() vin=48v,vout=5v,iout=0.1a normalized at ta=25 figure6. feedback voltage curve
xlsemi datasheet 2.1a 100khz 90v buck dc to dc converter XL7056 rev 1.2 www.xlsemi.com 7 typical system application (vout=15v, iout=0~1.2a) XL7056 l1 100uh/2a cin 100uf /100v c2 105 r2 30k 1% r1 2.7k 1% d1 fsv10150 sw fb gnd vin vin 20v~80v 7 4 2 1 cff 10nf cout 100uf /35v r3 0.055 1% c1 104 vout 15v/0~1.2a input 20v~80v output 15v/0~1.2a vout=1.25*(1+r2/r1) csp 5 3 csn cc 105 vc 6 figure7. XL7056 system application (v in=20v~80v, vout=15v, iout=0~1.2a) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 efficiency vs output current efficiency(%) output current(a) vin=24v,vout=15v,iout=0.1a~1.2a vin=36v,vout=15v,iout=0.1a~1.2a vin=48v,vout=15v,iout=0.1a~1.2a vin=60v,vout=15v,iout=0.1a~1.2a vin=72v,vout=15v,iout=0.1a~1.2a figure8. XL7056 system application (efficiency vs output current)
xlsemi datasheet 2.1a 100khz 90v buck dc to dc converter XL7056 rev 1.2 www.xlsemi.com 8 typical system application (vout=5v, iout=0~2.1a) XL7056 l1 100uh/3a cin 100uf /100v c2 105 r2 10k 1% r1 3.3k 1% d1 fsv10150 sw fb gnd vin vin 10v~80v 7 4 2 1 cff 10nf cout 220uf /16v r3 0.035 1% c1 104 vout 5v/0~2.1a input 10v~80v output 5v/0~2.1a vout=1.25*(1+r2/r1) csp 5 3 csn cc 105 vc 6 figure9. XL7056 system application (v in=10v~80v, vout=5v, iout=0~2.1a) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 efficiency vs output current efficiency(%) output current(a) vin=12v,vout=5v,iout=0.1a~2.1a vin=24v,vout=5v,iout=0.1a~2.1a vin=36v,vout=5v,iout=0.1a~2.1a vin=48v,vout=5v,iout=0.1a~2.1a vin=60v,vout=5v,iout=0.1a~2.1a vin=72v,vout=5v,iout=0.1a~2.1a figure10. XL7056 system application (efficiency vs output current)
xlsemi datasheet 2.1a 100khz 90v buck dc to dc converter XL7056 rev 1.2 www.xlsemi.com 9 typical system application (vout=3.3v, iout=0~2.1a) XL7056 l1 100uh/3a cin 100uf /100v c2 105 r2 13.7k 1% r1 8.2k 1% d1 fsv10150 sw fb gnd vin vin 8v~80v 7 4 2 1 cff 10nf cout 220uf /16v r3 0.035 1% c1 104 vout 3.3v/0~2.1a input 8v~80v output 3.3v/0~2.1a vout=1.25*(1+r2/r1) csp 5 3 csn cc 105 vc 6 figure11. XL7056 system application (v in=8v~80v, vout=3.3v, iout=0~2.1a) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 efficiency vs output current efficiency(%) output current(a) vin=12v,vout=3.3v,iout=0.1a~2.1a vin=24v,vout=3.3v,iout=0.1a~2.1a vin=36v,vout=3.3v,iout=0.1a~2.1a vin=48v,vout=3.3v,iout=0.1a~2.1a vin=60v,vout=3.3v,iout=0.1a~2.1a vin=72v,vout=3.3v,iout=0.1a~2.1a figure12. XL7056 system application (efficiency vs output current)
xlsemi datasheet 2.1a 100khz 90v buck dc to dc converter XL7056 rev 1.2 www.xlsemi.com 10 package information package information (to263-7l) h1 ? dimensions in millimeters dimensions in inches min max min max a 4.25 4.55 0.167 0.179 a1 1.20 1.40 0.047 0.055 b 0.50 0.70 0.020 0.028 b1 0.58 0.84 0.023 0.033 c 0.40 0.60 0.016 0.024 d 9.05 9.45 0.356 0.372 e 9.80 10.20 0.386 0.402 e 1.27(bsc) 0.050(bsc) h 14.65 15.35 0.577 0.604 h1 0.80 1.20 0.031 0.047
xlsemi datasheet 2.1a 100khz 90v buck dc to dc converter XL7056 rev 1.2 www.xlsemi.com 11 important notice xlsemi reserve the right to make modifications , enhancements, improvements, corrections or other changes without notice at any time. xlsemi does not assume any liability arising out of the application or use of any product describe d herein; neither does it convey any license under its patent rights, nor the rights of others. xlsemi assumes no liability for applications assistance or the design of buyers? products. buyers are responsible for their pr oducts and applications using xlsemi components. to minimize the ri sks associated with buyers? products and applications, buyers should provide adequate design and operating safeguards. xlsemi warrants performance of its products to the speci fications applicable at the time of sale, in accordance with the warranty in xlsemi?s term s and conditions of sale of semiconductor products. testing and other quality control tec hniques are used to the extent xlsemi deems necessary to support this warranty. except where mandated by applicable law, testing of all parameters of each component is not necessarily performed. for the latest product information, go to www.xlsemi.com.

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