for technical questions, contact functionpak@vishay.com for marketing questions, contact functionpak.marketing@vishay.com document number: 10113 revision 27-nov-02 www.vishay.com 26 fx5545g205 vishay features fully integrated dc/dc converter high efficiency over large load range 100% duty cycle power density - more than 300w/inch 3 1ua shutdown current 2.7v to 6v input range (1li+ and 3-cell nicd or nimh cells) 1.8v to 3.3v 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 8w maximum current 2.5a 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 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 fx 5545 g205 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 8w 2.5a 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 www.vishay.com 27 fx5545g205 vishay document number: 10113 revision 27-nov-02 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 document number: 10113 revision 27-nov-02 www.vishay.com 28 fx5545g205 vishay parameter unit condition min typ max input voltage range v dc 2.7 6 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 8 voltage v dc 1.8 to 3.3 voltage tolerance % at 25 c ambient temperature - 5 + 5 temp. coefficient %/ c 0.03 ripple and noise mvpp dc to 20mhz 130 mvpp with 10 f output capacitor 90 general package weight gr. 1.5 temperature operation c - 40 + 85 storage c - 55 + 125 standard electrical specifications vout (v) vout vs. iout for vin = 3.6v; vout = 2.5v iout (a) 2.45 2.5 2.55 2.6 2.3 2.35 2.4 0.5 1 1.5 02 2.5 3 vout vs. vin vin (v) vout (v) 2.45 2.5 2.55 2.6 2.3 2.35 2.4 15 02 4 3 67 iout = 0.5a iout = 1.5a iout = 2.5a efficiency (%) efficiency vs. iout for vin = 3.6v; vout = 2.5v iout (a) 70 75 80 85 90 95 100 5 55 60 65 0.5 1 1.5 0 2 2.5 3 ? temp ( c) ? temp. vs. iout above 25 c ambient temperature; for vin = 6v iout (a) 30 40 50 60 0 10 20 0.5 1 1.5 02 2.5 3
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