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| x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 1 of 19 first member of the family applications ? low voltage, high density systems with intermediate bus architectures (iba) from 3.0v to 6.0v ? desktops, servers, portable computing ? broadband, networking, optical and communications systems ? battery operated equipment ? point of load regulators for high performance dsp, fpga, asic and microprocessor applications ? advanced set-top boxes benefits ? one part for different input and output voltage ranges ? reduces complete solution board area ? reduces discrete parts count by 90% ? minimal external l and c required ? can be placed on the bottom of host pcb ? compatible with conventional pick-and-place equipment features ? fully integrated controller, driver, fets and passives ? small footprint surface mount lga package:10x12mm ? wide input low voltage range: 3.0v ? 6.0v ? wide range programmable output: 0.75v ? 4.0v ? high continuous output current: 15a ? high current density: 80a/in 2 ? efficiency up to 95% ? remote voltage sense ? output overcurrent protection ? remote enable (on/off) ? programmable fixed frequency operation from 300khz to 500 khz ? frequency synchronization ? fast load transient response ? extremely low profile: 1.42mm ? wide operating temperature range ?40 to 115 c ? ul60950 recognized, csa c22.2 no. 60950-00 certified, and tuv en60950-1:2001 certified description the x3015p is a highly efficient point-of-load dc/dc power solution designed to deliver low voltages at high currents in close proximity to loads. the x3015p integrates all the required active and passive components in a single lga package including a synchronous buck pwm controller, driver circuits and two low rds on mosfets. this high level of integration reduces the need for multiple external components, allowing for a selection of optimum output filter components. remote enable, fast transient response and output overcurrent protection are just a few of the integrated features that minimize cost and time to market. model input voltage (vdc) input current (adc) output voltage (vdc) output current (adc) output ripple and noise (mv p-p) efficiency (5v in , 3.3v out , 15a) (%) x3015p 3.0 ? 6.0 13 0.75 ? 4.0 15 25 91.5
x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 2 of 19 1. absolute maximum ratings stresses in excess of the absolute maximum ratings may cause performance degradation, adversely affect long- term reliability and cause permanent damage to the converter. parameter conditions/description min max units operating junction temperature at 100% load -40 125 c output current (see output current derating curves) 15 adc input voltage v in referenced to pgnd -0.3 7.0 vdc boost voltage v boost referenced to pgnd -0.3 6.5 vdc frequency adjust voltage freq voltage ref to ?v s -0.3 v in +0.3 vdc voltage sense +v s to -v s -0.3 v in +0.3 vdc enable voltage referenced to -vs -0.3 v in +0.3 vdc output current adjust voltage ocp voltage referenced to -v s -0.3 v in +0.3 vdc negative voltage sense referenced to pgnd -0.1 +0.1 vdc 2. environmental and mechanical specifications parameter conditions/description min nom max units mechanical shock jesd - b104 - b 1500 g sinusoidal vibration jesd - b103 - b 20 g ambient temperature range measured on case (t case ) -40 115 c storage temperature (ts) -55 125 c weight 0.4 grams mtbf per telcordia tr-nwt-000332 4,052 khrs msl jedec j-std-020a level 3 240 c packaging/storage jedec j-std-033 yes n/a shipping / labeling jedec j-std-113-b yes n/a solderability j-std-002 cat 3 yes n/a x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 3 of 19 3. electrical specifications refer to the 15a reference design described in section 5. specifications apply over specified input voltage, output load and case temperature range of 0 to 115 c, unless otherwise noted. 3.1 input specifications parameter conditions/description min nom max units input voltage (v in ) transient input voltage continuous transient, 100ms 3.0 6.0 7.0 vdc vdc input current (at no load) v in nom , i out = 0a, enable high 50 madc input reflected ripple current v in min , i out max (z in = 5m ? , 10 x 22 f ceramic capacitors) 30 ma rms undervoltage lockout ramping up ramping down 2.75 2.65 2.85 2.75 2.95 2.9 vdc 3.2 output specifications parameter conditions/description min nom max units output voltage range (v out ) user programmable v out 0.7v in (0.75) 1 1.25 2.5 4.0 vdc output voltage setpoint accuracy (trim resistors 0.1% tolerance to optimize setpoint accuracy) -1.2 +1.2 %v out output current (i out ) v in min to v in max 0 15 adc line regulation v in min to v in max 0.2 %v out load regulation i out min to i out max 0.3 %v out turn-on time to output regulation band rise time (10% to 90%) 15 5 20 ms ms maximum admissible output capacitance v in min to v in max i out min to i out max 5,000 f dynamic regulation peak deviation settling time slew rate 10a/ s 50 -100% load step change to 1% error band 5.0 200 %v out s output voltage ripple & noise 2 v in min to v in max , i out min to i out max , bw=20mhz 25 40 mv p-p temperature coefficient 0.03 %v out / c duty cycle under steady state conditions 70 % 1) can be set below 1.25v only by using an external voltage reference 2) dependent on external l and c component values, refer to the 15a reference design x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 4 of 19 3.3 protection specifications parameter conditions/description min nom max units output overcurrent protection protection type non-latching output current limit threshold output current limit threshold 1 115 200 % i out max 1) dependent on output inductor esr, refer to the 15a reference design 3.4 feature specifications parameter conditions/description min nom max units enable converter on open circuit voltage converter off source current enable signal is low or the pin is connected to pgnd ? module is off venable is referenced to pgnd enable pin is floating von/off is referenced to pgnd enable pin is connected to pgnd 1.5 v in v in 0.75 10 vdc vdc vdc adc output voltage trim default output voltage no trim resistor 2.5 vdc trim range with internal voltage reference with external voltage reference 1.25 0.75 4.0 4.0 vdc vdc maximum output voltage i out min to i out max 70 %v in switching frequency adjustment default switching frequency v in nom , i out max 270 300 330 khz maximum programmable switching frequency v in nom , i out max 450 500 550 khz x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 5 of 19 4. typical performance characteristics 4.1 turn on and turn off via the input voltage figure 1. turn on via vin (slow rise) figure 3. turn on via vin (fast rise) figure 2. turn off via vin figure 4. turn off via vin (slow decay) x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 6 of 19 4.2 turn on and turn off via enable signal figure 5. turn on via enable signal figure 6. turn off via enable signal 4.3 output ripple and noise figure 7. output voltage ripple, vout=2.5v@15a figure 8. output voltage ripple, vout=1.3v@15a x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 7 of 19 4.4 transient response figure 9. vout=2.5v, 5a load step change, 10a/ s figure 10. vout=1.3v, 5a load step change, 10a/ s 4.5 input ripple current figure 11. input ripple current, vin=5v, vout=3.3v figure 12. input ripple cu rrent, vin=3.3v, vout=1.3v x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 8 of 19 4.6 output voltage regulation and ripple figure 13. load regulation at vout=3.3v figure 14. output ripple vs. load at vout=3.3v 4.7 efficiency and power dissipation figure 15. efficiency vs. input and output voltage figure 16. power dissipation vs. input and output voltage 3.288 3.290 3.292 3.294 3.296 3.298 3.300 3.302 0.0 3.0 6.0 9.0 12.0 15.0 iout (a) vout (v) vin min vin nom vin max 0 5 10 15 20 25 30 0.0 3.0 6.0 9.0 12.0 15.0 iout (a) v ripple (mv p-p) vin min vin nom vin max x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 9 of 19 4.8 output current derating curves the curves give an indication of the output current achievable with and without forced air cooling. however in the final application the maximum current is influenced by factors such as heat conduction through the pads to the pcb, orientation, the temperature of surrounding components and the input voltage. to ensure the reliability of the converter, care must be taken to guarantee that the figure 17. output current derating at 50c and 200lfm figure 19. output current derating at 70c and 200lfm maximum junction temperature is not exceeded under any conditions. the figures are for the unit mounted on reference design board that has six layers of 2oz copper. the location of the measurement point for case temperature is specified in the mechanical drawing in figure 23. refer to the ?x3015p application note? available from www.power-one.com for more details. figure 18. output current derating at 50c and 400lfm figure 20. output current derating at 70c and 400lfm x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 10 of 19 5. typical application schematic and boms +vin cout controller driver -vi n pgnd vboost +vs -vs enable trim vsw freq ocp lout ci n vin x3015p rf rcu signal ground connect for vin 3.0 - 4.0v open for vin 4.0 - 6.0v open = on rtd rtu increases current limit increases switching f requency reduces current limit rcd optional components figure 21. schematic of typical application table 1. bom for 15a reference design reference designator vendor description part number qty c out avx 330 f/6v case d tpsd337m006r0045 4 c in kyocera 10 f x7r 10v 1210 cm32x7r106m10ab 6 l out bi 1.5 h, 18a, esr 2.3mohm hm73-301r5 1 dc-dc converter power-one 15a pol dc-dc converter x3015p 1 r td /r tu calculated - output voltage trim section 1% resistors (1) r cd /r cu calculated - output current limit section 1% resistors (1) total number of components 12 table 2. bom for 7a reference design reference designator vendor description part number qty c out avx 330 f/6v case d tpsd337m006r0045 1 c in kyocera 10 f x7r 10v 1210 cm32x7r106m10ab 3 l out bi 3.9 h, 10a, esr 7.2mohm hm73-303r9 1 dc-dc converter power-one 15a pol dc-dc converter x3015p 1 r td /r tu calculated - output voltage trim section 1% resistors (1) r cd /r cu calculated - output current limit section 1% resistors (1) r f calculated - frequency section 1% resistors (1) total number of components 6 x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 11 of 19 6. feature description 6.1 enable this function allows the x3015p to be turned on or off remotely. when the enable pin (#9) is pulled low, the output is turned off and the unit goes into a very low input power mode. an open collector switch is recommended to control the voltage between the enable pin and the pgnd pin of the converter. the enable pin is pulled up internally, so no external voltage source is required. if the enable pin is not used, it can be left floating. 6.2 v boost function when x3015p is operating with the input voltage lower than 4v, connect the v boost pin (#5) to v in . this improves internal mosfet operation, making the module more efficient. note: v boost may only be connected to v in for input voltages less than 4v. 6.3 maximum output voltage vs. input voltage the maximum steady state output voltage of the converter shall never exceed 70% of the input voltage: v in min v out /0.7. see graph in figure 22 for the output voltage ranges at different input voltages. 0.0 1.0 2.0 3.0 4.0 5.0 3.0 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4 5.7 6.0 vin (v) vout (v) requires external volta g e reference 1.25 0.75 figure 22. output voltage vs. input voltage 6.4 output voltage trim the output voltage is preset (default) to 2.5v. the trim feature allows the user to adjust the output voltage from this default value. increase v out : trim range 2.5v < v out 4.0v an external resistor (r tu ) is placed between the trim pin (#10) and the ?v s pin (#13, 14, 23) (pad r03 on the evaluation board). value of the r tu is determined from the equation below: r tu = 1.25 / (v out ? 2.5) ? 0.015, k ? , where v out is the required output voltage. decrease v out : trim range 1.25v v out < 2.5v an external resistor (r td ) is placed between the trim pin (#10) and the +v s pin (#11) (pad r07 on the evaluation board). value of the r td is determined from the equation below: r td = 1.25 / (2.5 ? v out ) ? 1.015, k ? decrease v out : trim range 0.75v v out < 1.25v an external voltage reference >1.25v is required to trim the x3015p below 1.25v. two external resistors are required for trimming and should be 0.1% tolerance to improve output voltage accuracy. a 357 ? resistor is placed between the trim pin and the +v s pin and a resistor r ext is placed between the trim pin and the positive terminal of the external reference voltage (pad r10 on the evaluation board). value of the r ext is determined from the equation below: r ext = (v ref ? 1.25) / (6 ? 3.8*v out ), k ? , where v ref is the external reference voltage. table 3. sample trim resistance values v out (v) r ext ( ? ) r td ( ? ) r tu ( ? ) 1.0 569 (v ref = 2.5v) 1.3 27 1.5 237 1.8 768 2.5 ------------- none ? factory default ------- 3.3 1540 4.0 820 x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 12 of 19 it is possible to adjust the output voltage of the x3015p with an external voltage signal applied to the trim pin. refer to the ?x3015p application note? for more details. 6.5 switching frequency adjustment the x3015p operates at a preset switching frequency of 300khz, but can be programmed up to a maximum frequency of 500khz by an external resistor (r f ) placed between the freq pin (#7) and the ?v s pin (pad r01 on eval board). values of r f for various switching frequencies are listed on the table 4. table 4. values of the frequency adjustment resistor r f frequency r f (k ? ) 300 khz (factory default) 400 khz 56 500 khz 24 the benefit of switching the converter at a higher frequency is the reduction of cost, size, and number of output filter components. however, switching losses increase at higher frequency that may lead to efficiency degradation. use the ?x3015p analysis tool? available from www.power-one.com to compare designs at different switching frequencies. the freq pin can also be used for frequency synchronization and modulation. refer to the ?x3015p application note? for more details. 6.6 undervoltage lockout the undervoltage lockout circuit monitors the input voltage applied to it and does not allow the x3015p to turn on until the input voltage reaches 2.85v. at that point, the x3015p initiates a soft start and powers up. 6.7 remote voltage sense this provides improved load regulation by allowing the unit to compensate for the voltage drop between the converter and the load. remote sense is achieved by kelvin connections routed from the +v s and -v s pins of the x3015p to the corresponding points at the load. to achieve optimal regulation and reduce noise susceptibility, it is recommended that these connections be routed adjacent to a ground plane. 6.8 overcurrent protection to provide protection from an output overload or short circuit condition, the x3015p is equipped the current limiting circuitry and can endure the fault condition for an unlimited duration. when the output current increases beyond the current limit setpoint (between 115% to 200% of the full load), the x3015p goes into the hiccup mode of operation. once the overload or short circuit is removed, the converter automatically exits the hiccup mode and continues normal operation. 6.9 current limit adjustment the current limit inception point is determined by the esr of the output inductor, the pcb trace resistance from the v sw pin (#21) to the output inductor, and the resistance from the output inductor to +v s pin. the combination of these resistances acts as a sense resistor ( r s ) measuring the output current level. thus, the value of r s can be determined from the equation below: r s = esr l + r trace (v sw -> l) + r trace (l -> +v s ) then, the current limit inception point is determined from the equation below: i cl = 0.103/r s the current limit adjustment allows greater flexibility to set the output current limit inception point using an external resistor. decreasing current limit inception point to i cld an external resistor (r cd ) is placed between the ocp pin (#6) and the v sw pin (pad r08 on eval board). value of the r cd is determined from the equation below: r cd = a * 22000 / (22000 ? a), ? , where a = (i cld * (367440 * r s )) ? 15800 increasing current limit inception point to i clu an external resistor (r cu ) is placed between the ocp pin and +v s pin (pad r09 on eval board). value of the r cu is determined from the equation below: r cu = (15800 * b) / (15800 ? b) ? , where b = 22000 / ((r s * 23.256 * i clu ) ? 1) x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 13 of 19 notes: 1. refer to the ?x3015p application note? before performing the calculations. 2. as the calculations require high accuracy, it is strongly recommended to use the ?x3015p analysis tool? to determine values of r cu and r cd . 6.10 safety considerations the x3015p modules do not provide isolation from input to output. the input devices powering x3015p must provide relevant isolation requirements according to all iec60950 based standards. nevertheless, if the system using the converter needs to receive safety agency approval, certain rules must be followed in the design of the system. in particular, all of the creepage and clearance requirements of the end-use safety requirements must be observed. these documents include ul60950 - csa60950-00 and en60950, although specific applications may have other or additional requirements. the x3015p modules have no internal fuse. if required, the external fuse needs to be provided to protect the module from catastrophic failure. refer to the ?input fuse selection for dc/dc converters? application note on www.power-one.com for proper selection of the input fuse. both input traces and the chassis ground trace (if applicable) must be capable of conducting a current of 1.5 times the value of the fuse without opening. the fuse must not be placed in the grounded input line. in order for the output of the x3015p module to be considered as selv (safety extra low voltage), according to all iec60950 based standards, the input to the module needs to be supplied by an isolated secondary source providing a selv also. x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 14 of 19 7. pinout diagram pin function name 1 input voltage v in 2 input voltage v in 3 input voltage v in 4 input voltage v in 5 boost voltage v boost 6 current trim ocp 7 frequency adjust freq 8 do not connect to any cct net n/c 9 user controlled turn on/off enable 10 output voltage adjust trim 11 positive voltage sense +v s 12 do not connect to any cct net n/c 13 negative voltage sense -v s 14 negative voltage sense -v s 15 power ground pgnd 16 power ground pgnd 17 power ground pgnd 18 power ground pgnd 19 power ground pgnd 20 power ground pgnd 21 switch voltage (output to inductor or lc filter) v sw 22 input voltage v in 23 negative voltage sense -v s 8. pin descriptions v in (pin 1 ? 4, 22): input voltage, 3 ? 6v. connect to the input voltage source. pgnd (pin 15 ? 20): ground. connect to ground/common. +v s (pin 11): positive voltage sense. connect to the positive point close to the load. -v s (pins 13, 14, 23): negative voltage sense. connect to the negative/ground point close to the load. this pin is also used as signal ground. trim (pin 10): output voltage trim. if the pin is left floating, the output voltage is set to 2.5 v. to increase the output voltage, connect an external resistor from the trim pin to ?v s . to decrease the output voltage, connect an external resistor from the trim pin to +v s. enable (pin 9): enable pin. ttl compatible on/off control. when the pin is left floating or pulled higher then 1.5v, the output of the converter is enabled (on). when the pin is connected to pgnd, or pulled below 0.75v, the output of the converter is disabled (off). freq (pin 7): switching frequency adjustment. when the pin is left floating the switching frequency is 300khz. with 56k ? resistor connected to the -v s pin, the operating frequency is increased to 400khz. with 24k ? resistor the frequency is set to 500khz. ocp (pin 6): current limit adjustment. this pin allows access to the positive terminal of the current amplifier. current limit can be increased by connecting a resistor to the +v s pin and reduced by connecting a resistor to the v sw pin. v boost (pin 5): boost voltage. when operating with input voltages below 4v, it is recommended to connect the pin to v in to improve efficiency of the converter. never connect v boost pin to v in when operating with input voltages in excess of 4v. v sw (pin 21): switch voltage. this is the switch voltage node. connect to the output inductor with a low impedance trace. n/c (pin 8 & 12): no connection. do not connect these pins to any point in the circuit. 19 20 17 18 15 16 14 13 2 1 23 21 22 11 12 10 3 45 6 9 7 8 pinout - bottom view x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 15 of 19 9. mechanical drawings all dimensions are in mm tolerances: 0.5-10 0.1 10-100 0.2 12.00 top view tc 3.00 5.00 pin 1 10.00 product marking pin 1 side view tc = case temperature measurement point 6 digit lot number rev: (3-digits#) x3015p 1.42 yyww - ph figure 23. x3015p mechanical drawing 1.25 2.75 6.45 4.55 4.05 2.25 1.45 (x 4) 1.75 x 3 1.25 2.75 6.45 4.05 4.55 1.45 2.25 (x 1) (x 1) 4.25 2.40 2.90 1.50 x 5 1.50 1.50 4.60 (x 16) 1.00 1.00 2.00 (x 1) 1.00 pad sizes 1.63 1.63 figure 24. recommended pcb layout (refer to the ?x3015p application note? for more details) x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 16 of 19 10. packaging 4.00 see note 1 2.00.10 see note 3 ?2.20 min ao = 10.5 bo = 12.5 ko = 1.9 notes: 1. 10 sprocket hole pitch cumulative toloerance +/_ 0.2 2. camber in compliance with eia 481 3. pocket position relative to sprocket hole measured as true position of pocket, not pocket hole. ? 1.5 +0.1 / -0.0 figure 25. tape and reel figure 26. jedec tray 11. ordering information part number description quantity of x3015p x3015p?r1 jedec tray 96 x3015p?t1 tape and reel 1500 part number description quantity of x3015p x3015p?k1 evaluation kit 1 sample and eval board x3015p?k5 sample kit 5 notes: 1. nuclear and medical applications - power-one products are not authorized for use as critical components in life support syst ems, equipment used in hazardous environments, or nuclear control systems without the express written consent of the respective divi sional president of power-one, inc. 2. technical revisions - specifications are subject to change without notice x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 17 of 19 appendix a: setup and use of the evaluation board for testing and characterization of the x3015p a1. purpose this procedure explains the requirements for the proper handling, setup, and testing of the x3015p evaluation board. a2. overview certain conditions have to be met in order to test the functionality of this device. the x3015p data sheet determines both temperature and power limitations involved in the testing and operation of the device. these limitations must not be exceeded. prolonged operation at elevated temperature or elevated power output can result in the failure of the device. a3. references all specifications are referenced against the latest revision of the data sheet. a4. procedure a4.1 test equipment the input source powering the evaluation board should be capable of delivering a minimum of 20a and must have the overvoltage protection. the loads must be 30a capable and operate at voltages down to 0.7v. lead length between the input source and the evaluation board and between the evaluation board and the load should not exceed 3ft (1m). additional input capacitance may be required under specific conditions. the amount of capacitance required is a factor of the input impedance, the input voltage, the input voltage regulation, and the output current. note: two 220 f tantalum capacitors c13 and c14 are placed on the evaluation board for bench test purposes only. this ensures that the source impedance is always less than the input impedance of the converter and satisfies the control loop stability criteria. in normal operation the x3015p is powered by a front-end supply located in close proximity, and therefore does not require any additional input capacitance. a4.2 connection of test equipment pgnd is the device ground pin. the input and output ground connections are tied to this pin. output voltage regulation measurements are taken from the output voltage sense pins. to determine unit power dissipation measure averaged output voltage at sense pins (before the inductor). user adjustable switch sw1 (factory settings, pin 3 & 8 on) the positive output voltage is connected to the vout pin. the positive input voltage is connected to the vin pin. output ripple is measured using the o/p noise sense 50 ? bnc input voltage measurements are taken from the input voltage sense pins voltage reference input (for outputs below 1.25v) x3015p 15a dc-dc pol data sheet 3.0v to 6.0v input ? 0.75v to 4.0v output rev. 3.0 jan 14, 2004 w ww.power-one.com page 18 of 19 a4.3 factory settings and output voltage adjustments to enable the evaluation board set en (sw1 pin1) to off; to disable set sw1 pin1 to on position. the factory setting is sw1 pin1 off (enable). note: to avoid damage to the device always observe the following: ? vout<0.7vin ? sw1 pin8 should be on only, if the input voltage is below 4v. if the input voltage exceeds 4v, the sw1 pin8 should be off the evaluation board factory setting for output voltage is 1.3v (sw1 pin3 on). when operating below 4v, sw1 pin8 should be on to activate v boost the evaluation board factory setting for v boost is active (sw1 pin8 to on). the output of 2.5v (x3015p default) requires sw1 pins 3 to 7 to off. to change the output to a set preprogrammed voltage of 1.3v, 1.5v, 1.8v or 3.3v a single switch must be set on of sw1 pins 3 to 6 respectively, example shown for 3.3v output. (note: pin8 must be off as v boost should not be active for vin>4v) to change the output voltage to a voltage greater than the x3015p default (>2.5v), a resistor needs to be placed on pad r03 (replacing the existing resistor used to generate 3.3v. refer to the data sheet to calculate value of the resistor). to change the output voltage to a voltage less than the default (1.25 |
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