Advanced Analog Technology, Inc.

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1 AA110 Produt information preented i urrent a of publiation date. Detail are ubjet to hange without notie ADANCED PWM DC-DC CONERER WIH INERNA SWICH AND SOF-SAR FEAURES 1.6A, 0.3Ω, Internal Swith High Effiieny: 90% Adjutable Output: to 15 Adjutable Frequeny: 640kHz or 1.3MHz Wide Input Range: +.6 to +5.5 ow Shutdown Current: 0.1μ A Programmable Soft-Start Small 8-Pin MSOP Pakage PIN CONFIGURAION EO IN SHDN GND OP IEW AA110 8-Pin MSOP SS FREQ SW GENERA DESCRIPION he AA110 i a tep-up DC-DC onverter with a 1.6A, 0.3Ω internal with. Equipped with an external ompenation pin, thi devie offer uer flexibility in determining loop dynami and adjuting operating frequeny. AA110 alo allow the ue of mall, low equivalent reitane (ESR) erami output apaitor, and it apable of onverting a tandard input of 3.3 to multiple output of 8, 8, and 3. Furthermore, filtering and loop performane are failitated and enhaned by a high withing frequeny of either 640 khz or1.3mhz. he AA110 veratility ome with a power-mart deign. A oft-tart programmed with an external apaitor that et the input urrent ramp rate, redue the urrent onumption to 0.1μ A in hutdown mode. When operating, a mere.6 input yield an impreive output voltage a high a 15. High withing frequeny and eonomial deign allow AA110 to be le than 1.1mm high. It ompat 8-pin MSOP pakage and uperior performane make it an ideal part for biaing F diplay. Page 1 of

2 PIN DESCRIPIONS PIN NAME FUNCION 1 EO Compenation Pin for Error Amplifier AA110 IN Feedbak Pin with a ypial Referene oltage of 1.4, OU R1 IN(1+ ) R 3 SHDN Shutdown Control Pin. he Devie Will urn Off When SHDN i ow 4 GND Ground 5 SW Swith Pin 6 Power Supply Pin 7 FREQ Frequeny Selet Pin. Swith Oillator Frequeny to 640kHz When FREQ i ow, and 1.3MHz When FREQ i High 8 SS Soft-Start Control Pin. No Soft-Start When the Pin i eft Open ABSOUE MAXIMUM RAINGS PARAMEER SYMBO AUE UNI SW to GND 0. 3 to +18 IN, SHDN,, FREQ to GND 0.3to +6 SS, EO to GND 0. 3 to ( + 0.3) RMS SW Pin Current Continuou Power Diipation ( C + 70 ) 8-Pin MSOP (De-Rate 4.1mW / above +70 ) Operation emperature Range Storage emperature Range Juntion emperature Range I 1. SW A P 330 d mw C 30 to to +15 torage J +150 ead emperature (Soldering for 10 eond) +300 Note: 1. Abolute Maximum Rating are threhold limit value that mut not be exeeded.. Operation above thee abolute maximum rating may aue degradation or permanent damage to the devie. 3. hee are tre rating only and do not neearily imply funtional operation below thee limit. Page of

3 AA110 EECRICA CHARACERISICS SHDN 3, FREQ GND, unle otherwie peified. ypial value are at C +5 o C ) PARAMEER SYMBO CONDIIONS MIN YP MAX UNIS Input Supply oltage Range Under oltage okout Quieent Current Shutdown Current UO I SC When i riing, typial hyterei i 40m; SW remain off below thi level IN 1.3, not withing ma 1.0, withing IN I SHDN GND μ A ERROR AMPIFIER PARAMEER SYMBO CONDIIONS MIN YP MAX UNIS Feedbak oltage evel to produe IN EO Input Bia Current I IN IN na evel to produe EO Feedbak-oltage ine 1.4, Regulation.6 < < %/ ranondutane g m ΔI μ A / oltage Gain A 1,500 / OSCIAOR PARAMEER SYMBO CONDIIONS MIN YP MAX UNIS Frequeny f OSC FREQ GND FREQ 1,100 1,30 1,600 khz Maximum Duty Cyle FREQ GND D MAX FREQ 85 % Page 3 of

4 EECRICA CHARACERISICS SHDN 3, FREQ GND, unle otherwie peified. ypial value are at + 5 C ) C o AA110 N-CHANNE SWICH PARAMEER SYMBO CONDIIONS MIN YP MAX UNIS Current imit I IM 1, Duty Cyle 65% A On-Reitane R ON I SW 1.A Ω eakage Current μ A I SWOFF SW SOF-SAR PARAMEER SYMBO CONDIIONS MIN YP MAX UNIS Reet Swith Reitane 300 Ω Charge Current μ A SS CONRO INPUS PARAMEER SYMBO CONDIIONS MIN YP MAX UNIS Input ow oltage Input High oltage Hyterei FREQ Pull-Down Current SHDN Input Current I IH SHDN, FREQ; to 5.5 SHDN, FREQ; to 5.5 SHDN, FREQ I μ A FREQ I SHDN μ A Page 4 of

5 ypial Operating Charateriti AA110 EFFICIENCY (%) EFFICIENCY (%) SEP-UP REGUAOR OUPU OAGE v.oad CURREN( MAIN 8.3) OAD CURREN(mA) INDUCOR CURREN(mA) Page 5 of

6 Fig. 1 YPICA APPICAION CIRCUI AA110.6 O 5 ON/ OFF Page 6 of

7 Fig. BOCK DIAGRAM AA110 Σ Page 7 of

8 Fig. 3 AA110 IN A SEPIC CONFIGURAION AA110.6 O 5 Page 8 of

9 Fig. 4 MUIPE-OUPU F CD POWER SUPPY AA110 Page 9 of

10 Indutor eletion IN D I I peak IN +, where D i duty yle ( ) f I o IN And I IN, D 1, 1 D o he indutor urrent rating mut be greater than I (peak). oop Compenation Deign AA110 Power Stage ranfer Funtion he duty to output voltage tranfer funtion i: vo p ( ) d Where And w z R p0 ( + w er + ξw r )( w n + w p0 O, ( 1 D)( R + r ) ) z n w er 1 Cr ( 1 D) r ( 1 D) R +, wn C( R + r ) ( R + r ) + Rr ( 1 D) ] + C( R + r )[ r + ( 1 D) R ] C[ r ξ, r p r r + Dr + ( 1 D) R DS F Fig.1. Cloed-urrent loop for boot with PCM r i the indutor equivalent erie reitane, r i apaitor ESR, R i the onverter load reitane, C i output filter apaitor, r DS i the tranitor on-reitane, and R F i the diode forward reitane. he duty to indutor urrent tranfer funtion pi i: pi il ( ) d Where pi0 pi0 O + wzi + ξw + w n ( R + r ) ( R + r ), w zi n C ( R + r ) 1 / Fig.. Blok diagram of boot onverter with PCM Page 10 of

11 Current Sampling ranfer Funtion Error voltage to duty tranfer funtion F m i: F m ( ) d v ei pi0 f R ( + ξw + w ) ( + w )( + w ) 3w Where 1 α M M a w h, α, π 1+ α M 1 + M a w π. f zi n n h β g m R + w 1 f R p 0 pi 0 ( + wz1 )( wz ) ( + w )( + w + 1 f ) zi FB Where β, o he ompenator tranfer funtion h AA110 herefore, F m depend on duty to indutor urrent tranfer funtion pi, and f i the lok withing v + w ( ) g mr, where v fb w 1 R C frequeny; R i the urrent-ene amplifier tranreitane. For the boot onverter M 1 IN / and M ( O - IN )/ For AA110, R 0.75 /A, M a i lope ompenation, M a he loed-urrent loop tranfer funtion il i: ν _ + Comparator ν ν O il ( ) 1 f R pi0 ( + ξwn + wn ) ( + w )( + w + 1 f ) zi h Fig.3. oltage loop ompenator he oltage-oop Gain With Current oop Cloed he ontrol to output voltage tranfer funtion i: vo ( ) d ( ) il ( ) p ( ) v ( ) he voltage-loop gain with urrent loop loed i: d Compenator deign guide: 1 1. Croover frequeny f i < f. Gain margin>10db 3. Phae margin>40 4. he vi ( ) 1 at roover frequeny, herefore, the ompenator reitane, R i determined by: vi ( ) β ( ) ( ) d Page 11 of

12 R o FB πf i kg CR m ( R + r ) r ( ) ( ) 1 D R 1 D AA110 FB i equal to referene voltage, REF. REF 1.4, k i the orret fator, and k ( 6 8) 5. he output filter apaitor i hoen o C. R pole anel R. C zero C R RC + r, and ( 1 3) C R C + r ( 1 3) R Example: IN 5, O 9.6, I O 50mA, f 600 khz, FB 1.5, 6. 8uH, g m 105uS, R /A, r 0. 1Ω, r 0. 3Ω, r C 50 mω, k 7 DS R F 1. 4Ω, f i 1. 4kHz, C 1.3nF, Ω, C 4.7uF R 7k Fig.5. Bode diagram uing Matlab imulation Fig.4. CH1: PWM waveform, CH, for o v p p Page 1 of

13 PACKAGE DIMENSION MSOP-8 AA110 Page 13 of

14 PACKAGE DIMENSION (CON.) MSOP-8 AA110 Page 14 of

15 APE AND REE PACKING MEHOD:,500PCS/REE, 1 REE/BOX AA110 Page 15 of

16 APE AND REE (CON.) PACKING MEHOD:,500PCS/REE, 1 REE/BOX AA110 Page 16 of

17 PAR MARKING AA110 MSOP8 OP MARKING 110 MAAC MSOP8 BACK MARKING YYWW Page 17 of

18 ORDERING INFORMAION AA110 Page 18 of

To determine the biasing conditions needed to obtain a specific gain each stage must be considered.

To determine the biasing conditions needed to obtain a specific gain each stage must be considered. PHYSIS 56 Experiment 9: ommon Emitter Amplifier A. Introdution A ommon-emitter oltage amplifier will be tudied in thi experiment. You will inetigate the fator that ontrol the midfrequeny gain and the low-and