for technical questions, contact functionpak@vishay.com for marketing questions, contact functionpak.marketing@vishay.com www.vishay.com 19 FX5545G108 vishay document number: 10131 revision 14p-jun-04 features fully integrated dc/dc converter high efficiency over large load range 100% duty cycle power density - more than 570w/inch 3 1ua shutdown current 2.5v to 6v input range (1li+ and 3-cell nicd or nimh cells) 0.9v to 4.5v* output voltage programmable pwm/psm controls low output ripple bga construction temperature range: - 40 c to + 85 c no external components required output power 15w maximum current 4a low profile the dc/dc converter is a programmable topology synchronized buck converter for today s continuous changing portable electronic market. the dc/dc converter provides flexibility of utilizing various battery configurations and chemistries such as nicd, nimh, or li+ with an input voltage range of 2.5v to 6v. an additional flexibility is provided with topology programmability to power multiple loads such as power amplifiers, microcontrollers, or baseband logic ic s. for ultra-high efficiency, converters are designed to operate in sychronous rectified pwm mode under full load while transforming into externally controlled pulse-skipping mode (psm) under light load. the dc/dc converter is available in 20-ports bga package. in order to satisfy the stringent ambient temperature requirements, the dc/dc converter is designed to handle the industrial temperature range of - 40 c to + 85 c. applications cordless phones, pda s and others supply voltage source for low-voltage chip sets point of load (pol) applications such as drivers for fpga s, microprocessors, dsp s amplifiers, etc. portable computers battery back-up supplies cameras the smallest and low profile 0.9v to 4.5v*, 4a with 570w/in 3 power density efficiency up to 95% dc/dc buck converter fx 5545 g108 function size circuit identifier output voltage - example: 3.3v should be written as 3v3 as the v indicates the decimal point, or adj for adjustable version - self selectable output voltage. packaging - b1 = 10pcs in bulk; b5 = 50pcs in bulk; t1 = 13?reel; t2 = 7?reel. ordering information *note: for higher output voltage please consult factory at functionp ak@v ishay .com
for technical questions, contact functionpak@vishay.com for marketing questions, contact functionpak.marketing@vishay.com document number: 10131 revision 14-jun-04 www.vishay.com 20 FX5545G108 vishay dimensions in inches [millimeters] t a c l b a w l 0.58 0.01 [14.7 0.25] w 0.48 0.01 [12.2 0.25] a 0.1 0.01 [2.54 0.25] b 0.09 0.01 [2.29 0.25] c 0.09 0.01 [2.27 0.25] t 0.126 max [3.2 max] ball diameter 0.03 0.001 [0.762 0.025] marked on upper side d f a ad f 0.1 0.01 0.03 0.001 0.02 0.001 [2.54 0.25] [0.8 0.02] [0.5 0.02] pin connection 1, 2 sd 3, 7 sync** 4, 8 n/c 5, 9 vin 6, 10 pwm/psm 11, 12 n/c 13, 17 gnd 14, 18 vout 15, 19 n/c 16, 20 gnd pin configuration* bottom side 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 see tape and reel information - type b tape and reel note: * pin description application note is available on page 52. ** if not used must be connected to vin. recommended pad pattern in inches [millimeters] a 1
for technical questions, contact functionpak@vishay.com for marketing questions, contact functionpak.marketing@vishay.com www.vishay.com 21 FX5545G108 vishay document number: 10131 revision 14p-jun-04 parameter unit condition minimum typical maximum input voltage range v dc 2.5 6 quiescent current a psm mode 200 soft start time ms t ss 6 sd, pwm/psm, sync logic high v v h 2.4 logic low v v l 0.8 normal mode ai dd 750 psm mode ai dd 250 shutdown mode ai dd 1 shutdown time ms t ss 5.5 insulation test voltage v ac 60hz 60sec 750 resistance ? v iso = 500v dc 1 x 10 11 leakage current na v iso = 500v dc 5 output power w 15 voltage v dc 0.9 to 4.5 voltage tolerance % at 25 c ambient temperature - 3 + 3 temp. coefficient %/ c 0.03 ripple and noise mvpp dc to 20mhz 80 general package weight gr. 1.4 oscillator frequency khz 400 sync range f sync /f osc 1.2 1.5 temperature operation c - 40 + 85 storage c - 55 + 125 operating junction temp. c tj 150 thermal impedance c/w d * ja 82 standard electrical specifications note: *w d = power dissipated
for technical questions, contact functionpak@vishay.com for marketing questions, contact functionpak.marketing@vishay.com document number: 10131 revision 14-jun-04 www.vishay.com 22 FX5545G108 vishay fall time rise time rise time (pwm mode): vin = 6v; vout = 3.3v; iout = 4a rise time (pwm mode): vin = 6v; vout = 3.3v; iout = 1a fall time (pwm mode): vin = 4v; vout = 3.3v; iout = 4a fall time (pwm mode): vin = 4v; vout = 3.3v; iout = 1a rise time (pwm mode): vin = 4v; vout = 3.3v; iout = 4a rise time (pwm mode): vin = 4v; vout = 3.3v; iout = 1a fall time (pwm mode): vin = 6v; vout = 3.3v; iout = 4a fall time (pwm mode): vin = 6v; vout = 3.3v; iout = 1a
for technical questions, contact functionpak@vishay.com for marketing questions, contact functionpak.marketing@vishay.com www.vishay.com 23 FX5545G108 vishay document number: 10131 revision 14p-jun-04 lout (a) vout vs. iout* vin = 4v vout (v) vout vs. vin* vin (v) vout (v) efficiency (%) efficiency vs. iout* vout = 3.3v iout (a) ? temp ( c) ? temp. vs. iout* above 25 c ambient temperature; vin = 6.0v; vout = 3.3v iout (a) vout vs. lout* vin = 4v vout vs. vin* 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3 3.05 3.1 3.15 0.5 1 1.5 02 2.5 3 3.5 4 4.5 3.2 3.25 3.3 3.35 3.4 3.45 3.5 456 3 3.05 3.1 3.15 37 3.5 4.5 5.5 6.5 7.5 30 40 50 60 0 10 20 0.5 13 0 3.5 1.5 2 2.5 70 44.5 100 80 90 vin = 4.0v 60 70 80 90 100 0 0.5 2 2.5 3.5 1 1.5 3 95 85 75 65 4.5 4 pwm mode *note: measurements were taken with power supply: zup 20-40 from nemic lambda; electronic load: 6063b from agilent; multimeter: fluke 45 from fluke and 34401 digital multimeter from agilent; scope: infiniium 54815a from agilent lout = 1a lout = 3a lout = 4a vin = 5.0v efficiency vs. iout* vout = 1.2v ? temp. vs. iout* above 25 c ambient temperature; vin = 6.0v; vout = 1.2v 1.2 1.25 1.3 1.35 1.4 1.45 1.5 1 1.05 1.1 1.15 0.5 1 1.5 02 2.5 3 3.5 4 4.5 1.2 1.25 1.3 1.35 1.4 1.45 1.5 345 1 1.05 1.1 1.15 26 2.5 3.5 4.5 5.5 6.5 lout = 1a lout = 3a lout = 4a 30 40 50 60 0 10 20 0.5 13 0 3.5 1.5 2 2.5 70 44.5 100 80 90 40 50 60 80 100 0 0.5 2 2.5 3.5 1 1.5 3 90 70 4.5 4 lout (a) vout (v) vin (v) vout (v) efficiency (%) iout (a) ? temp ( c) iout (a)
for technical questions, contact functionpak@vishay.com for marketing questions, contact functionpak.marketing@vishay.com document number: 10131 revision 14-jun-04 www.vishay.com 24 FX5545G108 vishay vout vs. lout* vin = 4v vout vs. vin* efficiency vs. iout* vin = 4.0v; vout = 3.3v 3 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 0 0.05 0.2 0.25 lout (a) vout (v) 0.1 0.15 0 10 20 30 40 50 60 70 80 90 100 0 0.05 0.1 0.2 iout (a) efficiency (%) 0.15 0.25 psm mode 3 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3 3.5 6 6.5 vin (v) vout (v) 4 5 4.5 5.5 *note: measurements were taken with power supply: zup 20-40 from nemic lambda; electronic load: 6063b from agilent; multimeter: fluke 45 from fluke and 34401 digital multimeter from agilent; scope: infiniium 54815a from agilent lout = 0.1a lout = 0.15a
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