Precision Micropower 2.5V ShuntVoltage Reference

Transcription

1 SPX4040 Prcision Micropowr.5V ShuntVoltag Rfrnc FETURES Trimmd Bandgap to 0.5% and % Wid Oprating Currnt 0µ to 5m Extndd Tmpratur Rang: -40 C to 85 C Low Tmpratur Cofficint 00 ppm/ C Rplacmnt in for LM CTHODE SPX Pin nsoic NODE 4 5 Now vailal in Lad Fr Packaging PPLICTIONS Battry Oprating Equipmnt djustal Supplis Switching Powr Supplis Error mplifirs Singl Supply mplifir Monitors / VCRs / TVs Prsonal Computrs DESCRIPTION Th SPX4040 is a -trminal, tmpratur compnsatd, andgap voltag rfrnc that provids a fixd.5v output for input currnts twn 0µ and 5m. Th andgap voltag (.5V) is indpndntly trimmd from th output voltag to achiv a vry low tmpratur cofficint. This trimming tchniqu givs a stal dvic ovr th full tmpratur rang (00ppm/ C). Th SPX4040 is availal in pin TO-9, SOT- and 8 pin NSOIC packags. Th oprating tmpratur rang is -40 C to 85 C. Th SPX4040 advancd dsign liminats th nd for an xtrnal stailizing capacitor whil nsuring staility with any capacitiv load, making it asy to us. TYPICL PPLICTIONS CIRCUIT Cathod (K) R + R.5V - nod ()

2 BSOLUTE MXIMUM RTINGS nod-cathod Forward Currnt, (<0ms) I... 0m K nod-cathod Rvrs Currnt I K... 0m Continuous Powr Dissipation at 5 C P D TO mW SOT mw SOIC mW Junction Tmpratur T J C Storag Tmpratur T STG to 50 C NOTE: Strsss gratr than thos listd undr BSOLUTE MXIMUM RTINGS may caus prmannt damag to th dvic. This is a strss rating only and functional opration of th dvic at ths or any othr conditions aov thos indicatd in th oprational sctions of this spcification is not implid. Exposur to asolut maximum rating conditions for xtndd priods may affct rliaility. TYPICL THERML RESISTNCES PCKGE 0 J 0 JC TYPICL DERTING TO-9 0 C/W 80 C/W. mw/ C SOT- 575 C/W 50 C/W.7 mw/ C SOIC-8 75 C/W 45 C/W 5.7 mw/ C Typical dratings of th thrmal rsistancs ar givn for amint tmpratur >5 C. Elctrical charactristics at I N = 000µ and T = +5 C unlss othrwis spcifid. PRMETERS CONDITIONS MIN TYP MX MIN TYP MX UNITS ELECTRICL CHRCTERISTICS Rvrs Brakdown I R = 500 µ V Voltag Rvrs Brakdown I R = 500µ ± ±5 mv Tolranc -40 C < T < 85 C ±9 ±49 mv Output Impdanc Ω Nois Voltag 0.KHz f 0Hz 5 5 µv p-p Tmpco Not ppm/ C Turn-on Stting.0% of V OUT 0 0 µsc Oprating Currnt Rang Not m Tmp. Rang (amint) C Nots:. Thr-point masurmnt guarants th rror and ovr th spcifid tmpratur rang.. Optimum prformanc is otaind at currnt low 000µ. CLCULTING VERGE TEMPERTURE COEFFICIENT (TC) ppm % mv VK TC in mv/ C = V K (mv) T T V ( K V at 5 C) x 00 K TC in % / C = T Junction Tmpratur ( C) TC in ppm/ C = V x 0 ( K V at 5 C) K T 0.07 mv/ C 0.00 %/ C 7 ppm/ C Figur. V K VS Tmpratur.

3 TYPICL PERFORMNCE CHRCTERISTICS V IN V K V K =.5V 0 C to 85 C I K IK Cathod Currnt (m) V K Cathod Voltag (V) Figur. Tst Circuit for I KREVERSE, V K =.5V Figur. High Currnt Oprating Charactristics V K =.5V 0 to 05 C 70 0 IK Cathod Currnt (µ) C 5 C -0 C V K Cathod Voltag (V) Nois Voltag nv/ Hz V K =.5V I K = 0m T = 5 C K 0K 00K f Frquncy (Hz) Figur 4. Low Currnt Oprating Charactristics Figur 5. Nois Voltag VS Frquncy 0.50 ZK Dynamic Impdanc (Ω) V K =.5V I K = to 5m f khz V IN V OUT T - Fr ir Tmpratur Figur. Low Frquncy Dynamic Output Impdanc VS. T MBIENT Figur 7. Frquncy = 00kHz, I K = 0m, T = 5 C

4 TYPICL PERFORMNCE CHRCTERISTICS VIN f p = 00kHz 50Ω 50Ω I K VOUT Dynamic Impdanc (Ω) T =5 C I K = to 5m ZK GND 0.0 K 0K 00K M 0M f Frquncy (Hz) Figur 8. Tst Circuit for Puls Rspons Figur 9. Dynamic Output Impdanc T = 5 C, I K = to 5m 00 0 IKOFF Cathod Currnt 0. V K =.5V T mint Tmpratur ( C) Figur 0. Off Stat Lakag PPLICTION INFORMTION This dvic is dsignd for stal opration and has no nd of an xtrnal capacitor twn pins 4 and 8. Th rfrnc rmains stal if a ypass capacitor is usd. SOT- Th SPX4040 in th SOT- packag has a parasitic Schottky diod twn pin and pin. Pin of SOT- must float or connctd to pin. Convntional Shunt Rgulator In a convntional shunt rgulator application (s Figur ), an xtrnal sris rsistor (R S ) is connctd twn th supply voltag and th SPX4040. R S dtrmins th currnt that flows through th load (I L ) and th rfrnc (I Q ). Sinc load currnt and supply voltag may vary, R S should small nough to supply at last th minimum accptal I Q to th rfrnc vn whn th supply voltag is at its minimum and th load currnt is at its maximum valu. Whn th supply voltag is at its maximum and I L is at its minimum, R S should larg nough so that th currnt flowing through th SPX4040 is lss than 5m. R S is dtrmind y th supply voltag (V S ), th load and oprating currnt (I L and I Q ), rfrnc's rvrs rakdown voltag (V R ). R S = (V S -V R )/(I L +I Q ) 4

5 TYPICL PERFORMNCE CHRCTERISTICS V S I Q V IN = 5V M V R RS I Q + I L I L V OUT + 7 LM450C _ 4 8 M 50pF.5M 0V SPX4040 I Q.7M I Q µ standy currnt Figur. SPX4040 Fixd Shunt Rgulator pplication Figur. Micropowr 0V Rfrnc * I OUT = 5.0V R 0V.0V k R 00k 7 C 50pF.5V LM + 4 I OUT * R.5V to 7V Figur. Prcision µ to m Currnt Sourc Figur 4. Rfrnc from.0v Battry V IN =.V to 0V LM4 4.k.5V Figur 5. Wid Input Rang Rfrnc 5

6 PCKGE: 8 PIN NSOIC D Ø E/ E/ E E Sating Plan Ø L L Ø INDEX RE (D/ X E/) TOP VIEW L VIEW C Gaug Plan Sating Plan SIDE VIEW 8 Pin NSOIC JEDEC MO-0 () Variation SYMBOL MIN NOM MX c D E E L BSC.00 BSC.90 BSC.7 BSC -.7 L L ø 0º.04 REF 0.5 BSC - 8º ø 5º - 5º B B c SEE VIEW C Not: Dimnsions in (mm) BSE METL SECTION B-B WITH PLTING

7 PCKGE: PIN SOT- D B B SEE VIEW C E E VIEW - Gaug Plan L VIEW C L Ø Sating Plan Pin SOT- JEDEC TO- (B) Variation SYMBOL MIN NOM MX c D E BSC.90 BSC -.4 E...4 L L ø 0º 0.54 REF - 8º SIDE VIEW WITH PLTING c Sating Plan C Not: Dimnsions in (mm) BSE METL SECTION B-B 7

8 PCKGE: PIN TO-9 L W D S Pin TO-9 SYMBOL MIN NOM MX E L R S W D a 4º - º E R Not: Dimnsions in (inchs) a(x) 8

9 PCKGE PINOUTS 8-Pin SOIC (S) SOT-- (M) TO-9 (N) Top Viw Bottom Viw Top Viw ORDERING INFORMTION PRT NUMBER CC OUTPUT VOLTGE PCKGES SPX4040M %....5V... -Pin SOT- SPX4040M-.5/TR %....5V... -Pin SOT- SPX4040N %....5V... -Pin TO-9 SPX4040N-.5/TR %....5V... -Pin TO-9 SPX4040S %....5V... 8-Pin NSOIC SPX4040S-.5/TR %....5V... 8-Pin NSOIC SPX4040M %....5V... -Pin SOT- SPX4040M-.5/TR....0%....5V... -Pin SOT- SPX4040N %....5V... -Pin TO-9 SPX4040N-.5/TR....0%....5V... -Pin TO-9 SPX4040S %....5V... 8-Pin NSOIC SPX4040S-.5/TR....0%....5V... 8-Pin NSOIC vailal in lad fr packaging. To ordr add "-L" suffix to part numr. Exampl: SPX4040S-.5/TR = standard; SPX4040S-L-.5/TR = lad fr /TR = Tap and Rl Pack quantity is,000 for TO-9,,500 for NSOIC and SOT-. CLICK HERE TO ORDER SMPLES Corporation NLOG EXCELLENCE Sipx Corporation Hadquartrs and Sals Offic South Hillviw Driv Milpitas, C 9505 TEL: (408) FX: (408) Sipx Corporation rsrvs th right to mak changs to any products dscrid hrin. Sipx dos not assum any liaility arising out of th application or us of any product or circuit dscrid hrin; nithr dos it convy any licns undr its patnt rights nor th rights of othrs. 9