for technical questions, contact functionpak@vishay.com for marketing questions, contact functionpak.marketing@vishay.com www.vishay.com 29 FX5545G305 vishay document number: 10115 revision 25-mar-03 features fully integrated dc/dc converter high efficiency over large load range 100% duty cycle power density - more than 380w/inch 3 1ua shutdown current 2.7v to 6v input range (1li+ and 3-cell nicd or nimh cells) 1.5v to 3.6v output voltage programmable pwm/psm controls low output ripple bga/lga construction temperature range: - 40 c to + 85 c no external components needed output power 10w maximum current 3.0a 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 2.7v 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 synchronous 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 fx 5545 g305 function size circuit identifier output voltage-example: 2.7v should be written as 2v7 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 application cordless phones, pdas and others supply voltage source for low-voltage chip sets portable computers battery back-up supplies cameras routers fiber optics lans image processing industry smallest and low profile 10w 3.0a dc/dc buck converter with high output density power requirements, the dc/dc converter is designed to handle the industrial temperature range of - 40 c to + 85 c.
for technical questions, contact functionpak@vishay.com for marketing questions, contact functionpak.marketing@vishay.com document number: 10115 revision 25-mar-03 www.vishay.com 30 FX5545G305 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 0.12 max [3 max] marked on upper side d f a 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] recommended pad pattern in inches [millimeters] 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 32. **note: if not used must be connected to vin.
for technical questions, contact functionpak@vishay.com for marketing questions, contact functionpak.marketing@vishay.com www.vishay.com 31 FX5545G305 vishay document number: 10115 revision 25-mar-03 parameter unit condition min typ max input voltage range v dc 2.7 6 quiescent current a psm mode 200 soft start time ms t ss 5 sd, pwm/psm, sync logic high v v h 2.4 logic low v v l 0.8 normal mode a i dd 750 psm mode a i dd 250 shutdown mode a i dd 1 shutdown time ms t ss 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 10 voltage v dc 1.5 to 3.6 voltage tolerance % at 25 c ambient temperature - 3 + 3 temp. coefficient %/ c 0.03 ripple and noise mvpp dc to 20mhz 150 general package weight gr. 1.5 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 fall time rise time rise time (pwm mode): vin = 6v; vout = 3.3v; iout = 3a fall time (pwm mode): vin = 6v; vout = 3.3v; iout = 3a
for technical questions, contact functionpak@vishay.com for marketing questions, contact functionpak.marketing@vishay.com document number: 10115 revision 25-mar-03 www.vishay.com 32 FX5545G305 vishay vout (v) vout vs. iout for vin = 3.6v iout (a) 2.45 2.5 2.55 2.6 2.3 2.35 2.4 1 0234 vout vs. vin vin (v) vout (v) 2.45 2.5 2.55 2.6 2.3 2.35 2.4 024 6 8 iout = 0.5a iout = 1.5a iout = 3.0a efficiency (%) efficiency vs. iout for vin = 3.6v; vout = 2.5v iout (a) 70 75 80 85 90 95 100 50 55 60 65 1 0234 ? temp ( c) ? temp. vs. iout above 25 c ambient temperature; for vin = 5v iout (a) 50 70 80 90 0 10 40 1 0234 60 30 20 vout vs. vin (psm mode) lout = 0.1a vout vs. lout (psm mode) vin = 6v efficiency vs. iout (psm mode) 3.2 3.22 3.24 3.26 3.28 3.3 3.32 3.34 3.36 3.38 3.4 345 67 vin (v) vout (v) 3.2 3.22 3.24 3.26 3.28 3.3 3.32 3.34 3.36 3.38 3.4 0 0.05 0.1 0.15 0.2 0.25 iout (a) vout (v) 0 10 20 30 40 50 60 70 80 90 100 0 0.05 0.1 0.15 0.2 0.25 iout (a) vout (v) vin = 4v vin = 6v
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