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ame, inc. 1 rev. a.01 AME9172 bus termination regulator the AME9172 is a voltage regulator which could con- vert the input voltage ranging from 1.3v to 6v to an output voltage that user settled. the regulator can provide sourc- ing or sinking current. the AME9172 used in conjunc- tion with series termination resistors, provides an excel- lent voltage source for active termination schemes of high speed transmission lines as those seen in high speed memory buses and distributed backplane designs. the voltage output of the regulator can be used as a termination voltage for ddr sdram. current limits in both sourcing and sinking mode, plus on-chip thermal shutdown make the circuit tolerant of the output fault conditions. l ddr memory termination supply l active termination buses l desktop pc/agp graphics l supply splitters l set top box/ipc n general description n features n applications l support both ddr 1 (1.25vtt), ddr 2 (0.9vtt) & ddr 3 (0.75vtt) require ments l capable of sourcing and sinking current l current-limiting protection l thermal protection l integrated power mosfets l generates termination voltages for sstl-2 l high accuracy output voltage at full-load l adjustable vout by external resistors l shutdown for standby or suspend mode operation with high-impedance output l all ame ? s lead free products meet rohs standards l minimum external components
ame, inc. 2 rev. a.01 AME9172 bus termination regulator n block diagram vin vcntl thermal protection circuit + - vout vcntl over current & refen + - gnd thermal sensor
ame, inc. 3 rev. a.01 AME9172 bus termination regulator n application circuit fig 1 : application circuit AME9172aahaz fig 2 : application circuit AME9172aazaz ddr_vtt c8 4.7u c4 0.1 m c2 470 m c6 470u ddr_2.5v 1 2 3 4 5 6 7 8 vin gnd ref vout vcnt vcnt vcnt vcnt 1.25v/1.5a r2 100k vcc_3v r4 100k AME9172aahaz sop-8 AME9172aahaz sop-8 c7 4.7 m c3 0.1 m 1.25v/2a c4 470 m vcc_3v r1 100k ddr _ vtt ddr_2.5v c 5 470 m r3 100k 1 2 3 4 5 6 7 8 vin gnd ref vout nc vcnt nc nc g n d _ p a d AME9172aazaz sop-8/pp AME9172aazaz sop-8/pp
ame, inc. 4 rev. a.01 AME9172 bus termination regulator n pin configuration part number AME9172aahaz (sop-8) AME9172 pin assignment pin configurations 8 7 6 5 vcntl vcntl vcntl vcntl 1 2 3 4 vin gnd refen vout part number for better heat dissipation). the pad of dimension is 0.090 x 0.090 (inch) AME9172 pin assignment pin configurations AME9172aazaz (sop-8/pp) nc= no internal connection = thermal pad (connected to gnd plane 8 7 6 5 nc vcntl 1 2 3 4 vin gnd refen vout nc nc
ame, inc. 5 rev. a.01 AME9172 bus termination regulator n ordering information AME9172 x x x x x operating ambient temperature range number of pins package type pin configuration special feature n ordering information part number marking* output voltage package operating ambient temperature range AME9172aahaz 9172 aaha yyww n/a sop-8 -25 o c to 85 o c AME9172aazaz 9172 aaza yyww n/a sop-8/pp -25 o c to 85 o c a: 1. vin a: -25 o c to 85 o c h: sop a: 8 z: lead free (sop-8) 2. gnd z: sop/pp 3. ref 4. vout 5. vcnt 6. vcnt 7. vcnt 8. vcnt a: 1. vin (sop-8/pp) 2. gnd 3. ref 4. vout 5. nc 6. vcnt 7. nc 8. nc pin configuration special feature operating ambient temperature range package type number of pins note: yyww represents the date code. * a line on top of the first letter represents lead free plating such as 9172 please consult ame sales office or authorized rep./distributor for package type availability.
ame, inc. 6 rev. a.01 AME9172 bus termination regulator n pin description pin name pin description vin power input gnd ground vcntl driving voltage refen input voltage reference & chip enable vout output voltage
ame, inc. 7 rev. a.01 AME9172 bus termination regulator n absolute maximum ratings n thermal characteristics n recommended operating conditions symbol parameter symbol unit thermal resistance in case sop-8 25.7 sop-8/pp 12 q jc o c/w symbol parameter rating unit vin input voltage. vin to gnd 6 v pd power disspation internally limit w vesd esd rating (human body mode) 2 kv tstg storage temperature 150 o c tl lead temperature (soldering. 5sec) 245 o c * the symbol "+" means the vout sources current to load; the symbol "-" means the vout sinks current to gnd symbol parameter rating unit vin supply voltage to vin 1.5 to 3.3 v vcnt supply voltage to vcnt 3.3 v *i out output current of vout pin * -2 to 2 a t j junction temperature -25 to 125 o c
ame, inc. 8 rev. a.01 AME9172 bus termination regulator parameter symbol min typ max units output offset voltage v os -20 0 20 mv -20 0 20 -20 0 20 ddr 1 1.8 2.5 4 ddr 2 1.6 1.8 4 ddr 3 1.3 1.5 4 v cntl ddr 1 / 2 / 3 2.5 3.3 6 operating current of v cntl i cntl 1.4 ma ddr 1 / 2 / 3 current limit i limit 2.0 a thermal shutdown temperature t sd 125 thermal shutdown hysteresis 30 guaranteed by design o c v no load over temperature protection 3.3v v cntl 5 v v in keep v cntl v in on operation power on and power off test condition i l = 0 to 1.5a ( fig 4) i out = 0a (note 1) mv short circuit protection fig 6,7 i l = 0 to -1.5a load regulation (ddr 1 / 2 / 3 ) v load input voltage range (ddr 1 / 2 / 3) 3 n electrical specifications note1: v os offset is the voltage measurement defined as v out subtracted from v refen . note2: ddr3 => v in = 1.5v, v cntl = 3.3v, v refen = 0.5v in limits in standard typeface are for t a = 2 5 , u n l e s s o t h e r w i s e s p e c i f i e d : j ddr1 => v in = 2.5v, v cntl = 3.3v, v refen = 0.5v in . (note2)
ame, inc. 9 rev. a.01 AME9172 bus termination regulator n test circuit f i g 4 : o u t p u t v o l t a g e t o l e r a n c e , v ? out fig 5: current in shutdown mode, i shdn
ame, inc. 10 rev. a.01 AME9172 bus termination regulator figure 6: current limit for high side, i clhigh figure 7: current limit for low side, i cllow
ame, inc. 11 rev. a.01 AME9172 bus termination regulator n typical characteristics
ame, inc. 12 rev. a.01 AME9172 bus termination regulator n operation waveforms ddr1 load transient response v in =2.5v, v cntl =3.3v v ref is 1.25v supplied by a regulator c out =1000 m f/35v i out slew rate = +-0.25a/ms load transient response v in =2.5v, v cntl =3.3v v ref is 1.25v supplied by a regulator c out =1000 m f/35v i out slew rate = +-0.25a/ms + 0 a ? + 1.5 a ? + 0 a + 0 a ? + 2 a ? + 0 a + 0 a ? + 2.5 a ? + 0 a ch1= i out , ch 4 = v out ch1= i out , ch 4 = v out ch1= i out , ch 4 = v out - 0 a ? - 1.5 a ? - 0 a - 0 a ? - 2 a ? - 0 a - 0 a ? - 2.5 a ? - 0 a ch1= i out , ch 4 = v out ch1= i out , ch 4 = v out ch1= i out , ch 4 = v out
ame, inc. 13 rev. a.01 AME9172 bus termination regulator load transient response v in =1.5v, v cntl =3.3v v ref is 0.75v supplied by a regulator c out =1000 m f/35v i out slew rate = +-0.25a/ms load transient response v in =1.5v, v cntl =3.3v v ref is 0.75v supplied by a regulator c out =1000 m f/35v i out slew rate = +-0.25a/ms + 0 a ? + 1.5 a ? + 0 a + 0 a ? + 2 a ? + 0 a ch1= i out , ch 4 = v out ch1= i out , ch 4 = v out n operation waveforms ddr3 - 0 a ? - 1.5 a ? - 0 a - 0 a ? - 2 a ? - 0 a ch1= i out , ch 4 = v out ch1= i out , ch 4 = v out
ame, inc. 14 rev. a.01 AME9172 bus termination regulator package carrier width (w) pitch (p) part per full reel reel size sop-8/pp 12.00.1 mm 4.00.1 mm 2500pcs 3301 mm package carrier width (w) pitch (p) part per full reel reel size sop-8 12.00.1 mm 4.00.1 mm 2500pcs 3301 mm n tape and reel dimension sop-8 carrier tape, number of components per reel and reel size pin 1 w p a m e a m e sop-8/pp carrier tape, number of components per reel and reel size pin 1 w p a m e a m e
ame, inc. 15 rev. a.01 AME9172 bus termination regulator n package dimension sop-8 min max min max a 1.35 1.75 0.05315 0.0689 a 1 0.10 0.30 0.00394 0.01181 a2 b 0.33 0.51 0.01299 0.02008 c 0.19 0.25 0.00748 0.00984 d 4.80 5.33 0.18898 0.20984 e 3.80 4.00 0.14961 0.15748 e l 0.40 1.27 0.01575 0.05000 h 5.80 6.30 0.22835 0.24803 y - 0.10 - 0.00394 q 0 o 8 o 0 o 8 o symbols millimeters inches 1.473 ref 0.05799 ref 1.27 bsc 0.05000 bsc 7 o (4x) c top view side view front view d e l a a 2 a 1 e b c h sop-8/pp min max min max a - 1.700 - 0.067 a 1 0.050 0.150 0.002 0.006 a2 1.350 1.550 0.053 0.061 c 0.100 0.250 0.004 0.010 e 3.750 4.150 0.148 0.163 e1 5.700 6.300 0.224 0.248 l 0.300 0.700 0.012 0.028 b 0.310 0.510 0.012 0.020 d 4.720 5.120 0.186 0.202 e q 0 o 8 o 0 o 8 o 1.270 bsc 0.05 bsc symbols millimeters inches
life support policy: these products of ame, inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of ame, inc. ame, inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. ? ame, inc. , september 2007 document: 5007-ds9172-a.01 corporate headquarter u.s.a (subsidiary) ame, inc. analog microelectronics, inc. 2f, 302 rui-guang road, nei-hu district 3100 de la cruz blvd., suite 201 taipei 114, taiwan. santa clara, ca. 95054-2046 tel: 886 2 2627-8687 tel : (408) 988-2388 fax: 886 2 2659-2989 fax: (408) 988-2489 www.ame.com.tw e-mail: sales@ame.com.tw

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