datasheet 0.8a 150khz 80v buck dc to dc converter XL7015 rev 1.1 www.xlsemi.com 1 features ? wide 5v to 80v operation voltage ? output adjustable from 1.25v to 20v ? maximum duty cycle 100% ? minimum drop out 1v ? fixed 150khz switching frequency ? maximum 0.8a output current ? recommend output power less than 7w ? internal optimize hv power transistor ? high efficiency up to 85% ? excellent line and load regulation ? ttl shutdown capability ? built in thermal shutdown function ? built in output short protection function ? built in current limit function ? to252-5l package applications ? ebike controller power supply ? telecom / networking equipment general description the XL7015 is a 150khz fixed frequency pwm buck (step-down) dc/dc converter, capable of driving a 0.8a 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 100%. an enable function, an over current protection function is built inside. when output short protection function happens, the operation frequency will be reduced from 150khz to 45khz. an internal compensation block is built in to minimize external component count. figure1. package type of XL7015
datasheet 0.8a 150khz 80v buck dc to dc converter XL7015 rev 1.1 www.xlsemi.com 2 pin configurations figure2. pin configuration of XL7015 (top view) table 1 pin description pin number pin name description 1 vin supply voltage input pin. XL7015 operates from a 5v to 80v dc voltage. bypass vin to gnd with a suitably la rge capacitor to eliminate noise on the input. 2 sw power switch output pin (sw). ou tput is the switch node that supplies power to the output. 3 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 XL7015. the exposed pad is gnd. 4 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. 5 en enable pin. drive en pin low to turn on the device, drive it high to turn it off. floating is default low.
datasheet 0.8a 150khz 80v buck dc to dc converter XL7015 rev 1.1 www.xlsemi.com 3 function block figure3. function block diagram of XL7015 typical application circuit figure4. XL7015 typical application circuit
datasheet 0.8a 150khz 80v buck dc to dc converter XL7015 rev 1.1 www.xlsemi.com 4 ordering information order information marking id package type packing type supplied as XL7015e1 XL7015e1 to252-5l 2500 units on tape & reel absolute maximum ratings
note1 parameter symbol value unit input voltage vin -0.3 to 85 v feedback pin voltage v fb -0.3 to vin v en pin voltage v en -0.3 to vin v output switch pin voltage v sw -0.3 to vin v power dissipation p d internally limited mw thermal resistance (to252-5l) (junction to ambient, no heatsink, free air) r ja 50 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.
datasheet 0.8a 150khz 80v buck dc to dc converter XL7015 rev 1.1 www.xlsemi.com 5 XL7015 electrical characteristics t a = 25 ;unless otherwise specified. symbol parameter test condition min. typ. max. unit system parameters test circuit figure4 vfb fb voltage vin =20v to 80v iload=0.1a to 0.4a 1.225 1.25 1.275 v ? efficiency vin=36v ,vout=15v iout=0.4a - 86 - % ? efficiency vin=48v ,vout=15v iout=0.4a - 83 - % ? efficiency vin=60v ,vout=15v iout=0.4a - 81 - % electrical characteristics (dc parameters) vin = 48v, gnd=0v, vin & gnd parallel connect a 33uf/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 5 80 v shutdown supply current i stby v en =2v 85 200 ua quiescent supply current i q v en =0v, v fb =vin 2.5 5 ma oscillator frequency fosc 120 150 180 khz switch current limit i l v fb =0 1 a high (regulator off) 1.6 en pin threshold v en low (regulator on) 0.8 v i h v en =2.5v (off) 6 20 ua en pin input leakage current i l v en =0.5v (on) 1 10 ua output saturation voltage v ce v fb =0v i out =0.5a 0.87 v max. duty cycle d max v fb =0v 100 %
datasheet 0.8a 150khz 80v buck dc to dc converter XL7015 rev 1.1 www.xlsemi.com 6 typical system application (recomme nd output current safe work range) 8 121620242832364044485256606468727680 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 recommend output current safe work range output current(a) input voltage(v) vout=5v 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 recommend output current safe work range output current(a) input voltage(v) vout=12v figure5.max output current(vout=5v) figure6.max output current(vout=12v) 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 recommend output current safe work range output current(a) input voltage(v) vout=15v figure7.max output current(vout=15v)
datasheet 0.8a 150khz 80v buck dc to dc converter XL7015 rev 1.1 www.xlsemi.com 7 typical system application(vout=15v/0.4a) figure8. XL7015 system applicati on (vin=20v~80v, vout=15v/0.4a) 0.10 0.15 0.20 0.25 0.30 0.35 0.40 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 efficiency vs output current efficiency(%) ouput current(a) vin=24v,vout=15v,iout=0.1~0.4a vin=36v,vout=15v,iout=0.1~0.4a vin=48v,vout=15v,iout=0.1~0.4a vin=60v,vout=15v,iout=0.1~0.4a vin=72v,vout=15v,iout=0.1~0.3a figure9. XL7015 system application (efficiency vs output current)
datasheet 0.8a 150khz 80v buck dc to dc converter XL7015 rev 1.1 www.xlsemi.com 8 typical system application(vout=5v/0.8a) figure10. XL7015 system applicat ion (vin=8v~80v, vout=5v/0.8a) 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80 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=5v,iout=0.1a~0.6a vin=24v,vout=5v,iout=0.1a~0.7a vin=36v,vout=5v,iout=0.1a~0.7a vin=48v,vout=5v,iout=0.1a~0.8a vin=60v,vout=5v,iout=0.1a~0.7a vin=72v,vout=5v,iout=0.1a~0.6a figure11. XL7015 system application (efficiency vs output current)
datasheet 0.8a 150khz 80v buck dc to dc converter XL7015 rev 1.1 www.xlsemi.com 9 package information package information (to252-5l)
datasheet 0.8a 150khz 80v buck dc to dc converter XL7015 rev 1.1 www.xlsemi.com 10 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.
|
