XL6008 400khz 60v 3a switching current boost / buck-boost / inverting dc/dc converter rev 1.2 www.xlsemi.com 1 features n wide 3.6v to 32v input voltage range n positive or negative output voltage programming with a single feedback pin n current mode control provides excellent transient response n 1.25v reference adjustable version n fixed 400khz switching frequency n maximum 3a switching current n sw pin built in over voltage protection n excellent line and load regulation n en pin ttl shutdown capability n internal optimize power mosfet n high efficiency up to 92% n built in frequency compensation n built in soft-start function n built in thermal shutdown function n built in current limit function n available in to252-5l package applications n automotive and industrial boost / buck-boost / inverting converters n portable electronic equipment general description the XL6008 regulator is a wide input range, current mode, dc/dc converter which is capable of generating either positive or negative output voltages. it can be configured as either a boost, flyback, sepic or inverting converter. the XL6008 built in n-channel power mosfet and fixed frequency oscillator, current-mode architecture results in stable operation over a wide range of supply and output voltages. the XL6008 regulator is special design for portable electronic equipment. figure1. package type of XL6008
XL6008 400khz 60v 3a switching current boost / buck-boost / inverting dc/dc converter rev 1.2 www.xlsemi.com 2 pin configurations figure2. pin configuration of XL6008 (top view) table 1 pin description pin number pin name description 1 gnd ground pin. 2 en enable pin. drive en pin low to turn off the device, drive it high to turn it on. floating is default high. 3 sw power switch output pin (sw). 4 vin supply voltage input pin. XL6008 operates from a 3.6v to 32v dc voltage. bypass vin to gnd with a suitably large capacitor to eliminate noise on the input. 5 fb feedback pin (fb). the feedback threshold voltage is 1.25v.
XL6008 400khz 60v 3a switching current boost / buck-boost / inverting dc/dc converter rev 1.2 www.xlsemi.com 3 function block figure3. function block diagram of XL6008 typical application circuit figure4. XL6008 typical application circuit (boost converter)
XL6008 400khz 60v 3a switching current boost / buck-boost / inverting dc/dc converter rev 1.2 www.xlsemi.com 4 ordering information part number marking id lead free lead free packing type XL6008e1 XL6008e1 tube package temperature range XL6008tre1 XL6008e1 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 input voltage vin -0.3 to 36 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 output -0.3 to 60 v power dissipation p d internally limited mw thermal resistance (to252-5l) (junction to ambient, no heatsink, free air) r ja 50 o c/w operating junction temperature t j -40 to 125 o c storage temperature t stg -65 to 150 o c lead temperature (soldering, 10 sec) t lead 260 o c esd (hbm) >2000 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 indicated in the operation is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability.
XL6008 400khz 60v 3a switching current boost / buck-boost / inverting dc/dc converter rev 1.2 www.xlsemi.com 5 XL6008 electrical characteristics t a = 25 ;unless otherwise specified. symbol parameter test condition min. typ. max. unit system parameters test circuit figure4 vfb feedback voltage vin = 12v to 16v, vout=18v iload=0.1a to 1a 1.213 1.25 1.287 v efficiency ? vin=12v ,vout=18.5v iout=1a - 92 - % electrical characteristics (dc parameters) vin = 12v, gnd=0v, vin & gnd parallel connect a 220uf/50v capacitor; iout=0.5a, t a = 25 ; the others floating unless otherwise specified. parameters symbol test condition min. typ. max. unit input operation voltage vin 3.6 32 v shutdown supply current i stby v en =0v 70 100 ua quiescent supply current i q v en =2v, v fb =vin 2.5 5 ma oscillator frequency fosc 320 400 480 khz switch current limit i l v fb =0 3 a output power nmos rdson vin=12v, i sw =3a 110 120 mohm en pin threshold v en high (regulator on) low (regulator off) 1.4 0.8 v i h v en =2v (on) 3 10 ua en pin input leakage current i l v en =0v (off) 3 10 ua max. duty cycle d max v fb =0v 90 %
XL6008 400khz 60v 3a switching current boost / buck-boost / inverting dc/dc converter rev 1.2 www.xlsemi.com 6 schottky diode selection table current surface mount through hole vr (the same as system maximum input voltage) 20v 30v 40v 50v 60v 1a 1n5817 1n5818 1n5819 1n5820 1n5821 1n5822 mbr320 mbr330 mbr340 mbr350 mbr360 sk32 sk33 sk34 sk35 sk36 30wq03 30wq04 30wq05 31dq03 31dq04 31dq05 3a sr302 sr303 sr304 sr305 sr306 typical system application C boost (output 18.5v/1a) figure5. XL6008 typical system application (boost converter)
XL6008 400khz 60v 3a switching current boost / buck-boost / inverting dc/dc converter rev 1.2 www.xlsemi.com 7 typical system application C sepic buck-boost (input 10v~30v, output 12v/2a) figure6. XL6008 typical system application (sepic buck-boost converter) typical system application for inverting converter C sepic inverting topology (input 10v~30v, output + -12v/0.6a) figure7. XL6008 typical system application (sepic inverting converter)
XL6008 400khz 60v 3a switching current boost / buck-boost / inverting dc/dc converter rev 1.2 www.xlsemi.com 8 package information to2 5 2-5l
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