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xlsemi datasheet 3a 150khz 30v buck dc to dc converter XL1507 2007 rev 1.4 www.xlsemi.com 1 features ? wide 4.75v to 30v input voltage range ? 3.3v,5v,12v, and adjustable versions ? output adjustable from 1.23v to 28v ? maximum duty cycle 100% ? minimum drop out 1.5v ? fixed 150khz switching frequency ? 3a constant output current capability ? internal optimize power transistor ? up to 90 % efficiency ? excellent line and load regulation ? ttl shutdown capability ? built in frequency compensation ? built in thermal shutdown function ? built in current limit function ? built in short protection function ? available in to-252 package applications ? lcd monitor and lcd tv ? digital photo frame ? set-up box ? adsl modem ? telecom / networking equipment general description the XL1507 is a 150 khz fixed frequency pwm buck (step-down) dc/dc converter, capable of driving a 3a 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 and a short circuit protection function are built inside. when ocp or scp happens, the operation frequency will be reduced from 150khz to 50khz. an internal compensation block is built in to minimize external component count. figure1. package type of XL1507 to252-5l
xlsemi datasheet 3a 150khz 30v buck dc to dc converter XL1507 2007 rev 1.4 www.xlsemi.com 2 pin configurations to252-5l figure2. pin configuration of XL1507 (top view) table 1 pin description pin number pin name description 1 vin supply voltage input pin. xl 1507 operates from a 4.75v to 30v dc voltage. bypass vin to gnd with a suitably large capacitor to eliminate noise on the input. 2 output 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 XL1507. 4 feedback feedback pin (fb). through an external resistor divider network, feedback senses the ou tput voltage and regulates it. the feedback threshold voltage is 1.23v. 5 on/off enable pin. drive on/off pin low to turn on the device, drive it high to turn it off. floating is default low.
xlsemi datasheet 3a 150khz 30v buck dc to dc converter XL1507 2007 rev 1.4 www.xlsemi.com 3 function block figure3. function block diagram of XL1507 typical application circuit fig4. XL1507 typical appli cation circuit 12v-5v/3a
xlsemi datasheet 3a 150khz 30v buck dc to dc converter XL1507 2007 rev 1.4 www.xlsemi.com 4 ordering information part number marking id package temperature range lead free lead free packing type XL1507-adje1 XL1507-adje1 tube XL1507-3.3e1 XL1507-3.3e1 tube XL1507-5.0e1 XL1507-5.0e1 tube XL1507-12e1 XL1507-12e1 tube XL1507-adjtre1 XL1507-adjtre1 tape & reel XL1507-3.3tre1 XL1507-3.3tre1 tape & reel XL1507-5.0tre1 XL1507-5.0tre1 tape & reel to252-5l -40 o c ~ 85 o c XL1507-12tre1 XL1507-12tre1 tape & reel xlsemi pb-free products, as designated with ?e1? suffix in the par number, are rohs compliant. XL1507 circuit type blank: tube tr: t yp e and reel e1: lead free e1 packing version adj: adjust 3.3: 3.3v 5.0: 5v 12: 12v
xlsemi datasheet 3a 150khz 30v buck dc to dc converter XL1507 2007 rev 1.4 www.xlsemi.com 5 absolute maximum ratings note1 parameter symbol value unit input voltage vin -0.3 to 32 v feedback pin voltage v fb -0.3 to vin v on/off pin voltage v on/off -0.3 to vin v output switch pin voltage v output -0.3 to vin v power dissipation p d internally limited mw thermal resistance (to252) (junction to ambient, no heatsink, free air) r ja 60 oc/w 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) 4000 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 indi cated in the operation is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability.
xlsemi datasheet 3a 150khz 30v buck dc to dc converter XL1507 2007 rev 1.4 www.xlsemi.com 6 electrical characteri stics (dc parameters) vin = 12v for the 3.3v,5v,and adjustable vers ions and vin=24v for the 12v version, gnd=0v, vin & gnd parallel connect a 220uf /50v capacitor; iout=500ma, t a = 25 ; the others floating unless otherwise specified. parameters symbol test condition min. typ. max. unit input operation voltage vin 4.75 30 v shutdown supply current i stby v on/off =5v 100 200 ua quiescent supply current i q v on/off =gnd, v fb =vin 2 5 ma switch current limit i l v fb =0 3.6 4.8 6.9 a on/off pin threshold v on/off v fb =0v, v on/off from 0.5v~2v 1.3 v i h v on/off =2.5v (off) 5 15 ua on/off pin input leakage current i l v on/off =0.5v (on) 0.2 5 ua output saturation voltage v ce v fb =0v i out =3a 1.3 1.6 v max. duty cycle d max v fb =0v 100 %
xlsemi datasheet 3a 150khz 30v buck dc to dc converter XL1507 2007 rev 1.4 www.xlsemi.com 7 electrical characteristics (sys tem parameters 3.3v version) fig5. XL1507 system parameters test circuit t a = 25 ;unless otherwise specified. parameters symbol test condition min. typ. max. unit feedback voltage v fb vin = 6v to 30v vout=3.3v, iout=0.5a 3.168 3.3 3.432 v vout line regulation r line vin = 6v to 30v vout=3.3v, iout=0.5a 0.5 2 % vout load regulation r load vin=12v, vout=3.3v iout=0.2 to 3a 0.8 2 % switching frequency f output vin=12v, vout=3.3v iout=0.5a 127 150 173 khz efficiency(12v~3.3v) ? vin=12v ,vout=3.3v iout=3a - 75 - %
xlsemi datasheet 3a 150khz 30v buck dc to dc converter XL1507 2007 rev 1.4 www.xlsemi.com 8 electrical characteristics (sys tem parameters 5v version) fig6. XL1507 system parameters test circuit t a = 25 ;unless otherwise specified. parameters symbol test condition min. typ. max. unit feedback voltage v fb vin = 8v to 30v vout=5v, iout=0.5a 4.8 5 5.2 v vout line regulation r line vin = 8v to 30v vout=5v, iout=0.5a 0.5 2 % vout load regulation r load vin=12v, vout=5v iout=0.2 to 3a 0.8 2 % switching frequency f output vin=12v, vout=5v iout=0.5a 127 150 173 khz efficiency(12v~5v) ? vin=12v ,vout=5v iout=3a - 80 - %
xlsemi datasheet 3a 150khz 30v buck dc to dc converter XL1507 2007 rev 1.4 www.xlsemi.com 9 electrical characteristics (sys tem parameters 12v version) fig7. XL1507 system parameters test circuit t a = 25 ;unless otherwise specified. parameters symbol test condition min. typ. max. unit feedback voltage v fb vin = 15v to 30v vout=12v, iout=0.5a 11.52 12 12.48 v vout line regulation r line vin = 15v to 30v vout=12v, iout=0.5a 0.6 2 % vout load regulation r load vin=24v, vout=12v iout=0.2 to 3a 0.8 2 % switching frequency f output vin=24v, vout=12v iout=0.5a 127 150 173 khz efficiency(24v~12v) ? vin=24v ,vout=12v iout=3a - 89 - %
xlsemi datasheet 3a 150khz 30v buck dc to dc converter XL1507 2007 rev 1.4 www.xlsemi.com 10 electrical characteristics (sys tem parameters adj version) fig8. XL1507 system parameters test circuit (the cff is optional. it provides additional stab ility for high output voltages, low input-output voltages, and/or very low es r output capacitors, such as solid tantalum capacitors) t a = 25 ;unless otherwise specified. parameters symbol test condition min. typ. max. unit feedback voltage v fb vin = 8v to 30v vout=5v, iout=0.5a 1.193 1.23 1.267 v vout line regulation r line vin = 8v to 30v vout=5v, iout=0.5a 0.5 2 % vout load regulation r load vin=12v, vout=5v iout=0.2 to 3a 0.8 2 % switching frequency f output vin=12v, vout=5v iout=0.5a 127 150 173 khz efficiency(12v~5v) ? vin=12v ,vout=5v iout=3a - 80 - %
xlsemi datasheet 3a 150khz 30v buck dc to dc converter XL1507 2007 rev 1.4 www.xlsemi.com 11 typical performance characteristics (circuit of figure 8 )
xlsemi datasheet 3a 150khz 30v buck dc to dc converter XL1507 2007 rev 1.4 www.xlsemi.com 12 package information (1) to2 2-5l

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