Order this data sheet by MC34063ND I MC34063A MC35063A MC33063A Advance Information DC-TO-DC CONVERTER CONTROL CIRCUITS SILICON MONQ@$@> The MC34063A Series is a monolithic control circuit containing the primary functions required for DC-to-DC converters. These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This series was specifically designed to be incorporated in Step-Down and Step-Up and Voltage-Inverting applications with a minimum number of external components. Refer to Application Notes AN920A and AN954 for additional design information. Operation from 3.0 V to 40 V Input ,.. *.,,,..,:> ... Low Standby Current Current Limiting Output Switch Current to 1.5 A Output Voltage Adjustable . Frequency Operation to 100 kHz Precision 20/0 Reference D SUFFIX ~J." ,,::*.'-.,*.., ,..$.,< .,,, *b, ?? ,,! I .<.'e.\!N PLASTIC PACWGE CASE 751-03 (S0-8) 8 e 1 U SUFFIX CERAMIC PACWGE CASE 693-02 8 1 PIN CONNECTIONS Collector Switch Collector Switch Emitter Tming Capacitor n ` 8 Driver Collector 2 7 Ipk sense a 3 6 `ndu Switch Emitter D Vcc Comparator Inverting Input (ToP View) Tming Capacitor I I I Comparator Inverting Input 1.25 V I Reference Regulator I I 5~ o [ I L______ I ORDERING INFORMATION I Temperature I I /4 I Gnd - _______________ m 1 This document contains information subject to change without notice. \ on a new product. Specifications and information herein are OMOTOROU m `to+700c INC., 1989 ADI1431 MAXIMUM RATINGS Rating Symbol Value Unit Vcc 40 Vdc VIR -0.3 to +40 Vdc Switch Collector Voltage vc(~witch) 40 Vdc Switch Emitter Voltage (Vpin 1 = 40 V) VE(~witch) 40 Vdc VCE(~witch) 40 Vdc Vc(driver) 40 Vdc Ic(driver) 100 mA Isw 1.5 Amps Power Supply Voltage Comparator Input Voltage Range Switch Collector to Emitter Voltage Driver Collector Voltage Driver Collector Current (Note 1) Switch Current Power Dissipation and Thermal Ceramic Package, U Suffix TA = + 25C Thermal Resistance Plastic Package, P Suffix TA = + 25C Thermal Resistance SOIC Package, D Suffix TA = + 25C Thermal Resistance Operating Storage pD R8JA pD ReJA pD ReJA Junction Temperature Operating Ambient MC35063A MC33063A MC34063A Temperature Temperature ELECTRICAL ..: ,,.~~.. v.> Y., Characteristics Range Hange CHARACTERISTICS 1.25 100 ,, ,,$& ~~.~~> .:.' ~?. ~.~.,. ,$ 1.25 $>, $,\ $ w 0 10Q,.,..,'!~%L'"M : CN "~}l;; .-+?>i)$ ~,..\\ ,+;%5 * mw ,.,,..p:$bw \t:> `.%" TJ $ ?,~{. , ,:C+I 50 :~`">:`~..v~ TA ~$ ... ...... -55to +125 ,!i~:. .!~. ..~:f,,. , -40to +85 *,.. ,,,?.s's<,:$ ,, .\ ,,~, Oto +70 !>: :$, `a. .>? "-, ,.- A -0010 + Iou ,,.,,,,&~~fg ,.> l.,% ..,. "..,< ,,.. `cm `c "c .A I (VCC = 5.0 V; TA = TIOW$O Thigh [Note 21 unless otherwise .,>:.. ,*4* k Symbol Min -L specified) Typ Max Units 24 33 42 kHz Ichg 24 33 42 PA Idischg 140 200 260 pA Idischgllchg 5.2 6.2 7.5 -- ~pk(sense) 250 300 350 mV Characteristic I OSCILLATOR .,,~.>:>.'.<r,t>t$. :,, ~ ,1:,'1.,**~~2 \ (Vpin 5 = O V, CT = 1.0 nF, TA = 25c) ,8,,,*i;FJ" .Y ~!$.>;>i? Charge Current ,:~$~t+t>,, ,,J> (VCC = 5.0 V to 40 V, TA = 25C) :~ t<~': Frequency fosc Discharge Current Discharge to Charge Curren$~a~~ (pin 7 = Vcc, TA = 2@&~&7,$F \ \ Current Limit Sense VoF' ,~~: ,,> 2 C) (Ich g = ldischg,.?~~.= *. $s:, ~>& - ~ t$j$ks~ " NOTES: 1, Maximum pa@,k>@wer dissipation limits must be observed. 2, TIOW = - ~;~{~r M~35063A Thigh = + 125C for MC35063A w,4Q~,@P MC33063A + 85C for MC33063A :w:''$j~C%?or MC34063A + 70C for MC34063A .~f \*. *. ,,,. MOTOROLA @ Semiconductor 2 Products Inc. ELECTRICAL CHARACTERISTICS -- continued (VCC = 5.0 V; TA = Tlow to Thigh unless otherwise specified) Symbol Min Typ Max Units Saturation Voltage, Darlington Connection (Isw = 1.0A, Pins 1, 8 connected) vCE(~at) -- 1.0 1.3 v Saturation Voltage (Isw = 1.0A, R~n 8 = 82 Q to Vcc, Forced ~ = 20) vCE(sat) -- 0.45 0.7 hFE 50 Ic(off) -- Chara@aristic OUTPUT SWITCH (Note 3) DC Current Gain (Isw = 1.0A, VCE = 5.0 V, TA = 2WC) Coi Iector Off-State Current (vcE = 40 V) COMPARATOR vth Threshold Voltage (TA = 2WC) (TA 1.225 1.21 = TIOW to Thigh) Threshold (Vcc = Voltage Line Regulation Regline -- 0.01 .+' " " .,\,\ `.$i),>~: ~.,t,$*P ~,k; s,<jt~ ;.:1 ~:, `~\,\i\ \ ,~t.h~ .. `? 1.275 ~j:h #,,, `:<t.~tv, *,tt ,,,,., ,VJ+.. ,.~ ..>> :.)>,. ?.4 !.>:,. :. ,x\:, .s.,., ta>,.z, !,:~$.> ,.. ;.,,> < ,,, ~~:$ IIB - 40 `.*~,~-. .,f$f! ,(44 .. M-.?u" ~,.!!\,,~kti'~t:$:~=.>'.$]::,, * - 2.5 ,,jke$'?,,:$ ,\.p 3.0 v to 40 v) Input Bias Current (Vin = O V) TOTAL DEVICE Supply Current (Vcc = 5.0 V to 40 V, CT = 1.0 nF, Pin 7 = Vcc, V~n 5> Vth, Pin 2 = Grid, Remaining pins open) .> ~.> .:.,, v 1.29 5.0 mV - 400 nA 40 mA ~:.~::~., .!,\> ....:,?,, .!;:+$ NOES: 3. Low duty cycle pulse techniques are used during test to maintain junction tem~rat~p as close to ambient temperature as possible, 4. If the output switch is driven into hard saturation (non-Darlington configurati~~~~@W switch currents (<300 mA) and high driver currents (-30 mA), it may take up to 2.0 ps to come out of saturation. This conditio~b~+~~horten the "off time at frequencies >30 kHz, and is magnified at high temperatures. This condition does not occur with a Darlington conflg~aflon, since the output switch cannot saturate. If a non-Darlington configuration is used, the following output drive condition is recommend$,d: ` $, .,, Forced p of output switch = Ic, outputi(lc, driver - 7.0 mA*) #$&,:, $]. .~~,:., *The 100 Q resistor in the emitter of the driver device require,: @~:~..O mA before the output switch conducts. MOTOROLA @ Semiconductor 3 Products Inc. I FIGURE 1 -- OUTPUT SWITCH ON-OFF TIME versus OSCILLATOR TIMING CAPACITOR - 1,01 I 0.01 I 0.02 I 1 I I I I 111111 I I [11111 0.5 1.0 2.0 0.05 0.1 0.2 CT, OSCILLATOR TIMING CAPACITOR (nF) I I IL 5.0 FIGURE 2 -- TIMING CAPACITOR WAVEFORM I 10 FIGURE 3 -- EMITTER FOLLOWER CONFIGURATION OUTPUT SATURATION VOLTAGE versus EMITTER CURRENT Ic, COLLECTOR CURRENT (A) FIGURE 5 -$@URti~T LIMIT SENSE VOLTAGE ~$;@&s TEMPERATURE FIGURE 6 -- STANDBY SUPPLY CURRENT versus SUPPLY VOLTAGE 3.2 . 2,a z g / 2,4 ( z 2.0 u E z ~ 1,6 3 & 1.2 2 _~ o.a - CT = l.OnF Rn 7 = VCC Pin 2 = Gnd 0.4 o0 5.0 TA, AMBIENT TEMPERATURE PC] m MOTOROLA 10 15 20 25 Vcc, SUPPLY VOLTAGE (V) Semiconductor 4 Products Inc. 30 35 40 FIGURE 7 -- STEP-UP CONVERTER 170 UH I L ~----- ------ --- --- ---- -- 7 1, R[ ~ II Ipk 1' CT Osc I 13 Vcc I ~ 5 r =~o Vout 100 T ~n Line Regulation = 8.0 V to ~&V, 10 = 175 mA 30 mv = f 0.05~0 FIGURE* M:#iTERNAL CURRENT BOOST cONNEcTIONS `"<:":~s@OR Ic PEAK GREATER THAN 1.5A ,.:$i 8B -- EXTERNAL NPN SATURATED SWITCH (REFER TO NOTE 4) ~----- _----_--_-------- --7 81 4-- R 11 I I 1 vou~ () . 1 ~ 71 I) 12 , I I I I Rsc I y" I 61 o R+ 0 I o I I I I r MOTOROLA @ 0 o Q I 1 L-------------------------------- 1 L---------------------------- Semiconductor 5 d Products Inc. Ofor constant ~n. FIGURE 9 -- STEP-DOWN ~------- I --------------- ------ 1 CONVERTER I Ji {) I I Ipk CT . RSC 0.33 I I 1N5:19 Osc Vi" 25 V + 1.25 V Ref Reg I 51 1 I I I L---------- :IL I I 14 r `& ---------__A I RZ 3.6 k R1 470 pF 470: 1.2k Results Test , ~n Line Regulation = 1st~~~}~~, 12 mV = *0.12Y0 10 = 500 mA Load Regulation ... ,... Vin = 25 @,:JO = 50 to 500 mA 3.0 Mv = * 0.03~0 Output Ripple ~j$ = f5 V, 10 = 500 mA 120 mVp-p `(>~n~~ Short Circuit Current .,:-~'":<*}*% Eticiency 1.1 A 25 V, RL = 0.1 Q 82.57. = 25 V, 10 = 500 mA 40 mVp-p Output Ripple With Optional F,~~w{,#' "Vin = 25 V, 10 = 500 mA *,. `,.~.. ,$ :f.~,,,\ ~" ,,!,,,$.,,,,. .$ ..,.~;,\.+:.t:*;, ~' >:$> -.>.,. Fl~@~$16 ~:.~w *,~*/* & ,., -- EXTERNAL CURRENT BOOST CONNECTIONS FOR Ic PEAK GREATER THAN 1.5A 10B -- EXTERNAL PNP SATURATED SWITCH T ~----- --------------- 1 I 8i I I JI 1 I I I I L---- I ------ ------ ------ -------- m ---- A MOTOROLA L--------------------------- Semiconductor 6 A Products Inc. 1 FIGURE 14 -- DESIGN FORMULA TABLE Calculation ton/toff (tOn + tOff) max CT Step-Up Voltage-lnvertin~ Step-Down vout+vF-vin(min) vout+vF lv~utl +VF Vin(~i") Vin(~i")-V~at-V~ut Vi~ - V~~t `V~~t llfmi" 4.8x 10-5 ton lpk(~witch) 2iout(max)(ton/toff RSC + I) l/fmin Ilfmin 4.8 4.8 x 10- 5 $;;\$~$ X 10-5 ton 210ut(max) 21~ut(m&:~(#~~WOfi+ 1) 0.3/lpk(~~it~h) 0.3/lPk(~~it~h) L(min) (Vin(min)-Vsat)tOn(max~ lpk(swit~h) (Vin(min) -Vsat- lpk(swit~h) co = `outton~ripple( lDk(switch)(ton + toff) 8 VriPPle(P-P) p-p) >`:$ ,.. ,,.>.. ~~:!j~y...~,k ,\:>. ,It$t,s .t$>.. ,:,,, ..$l .',. *:. ...~.f$ <$].*::<,. >./.:$.' VOut)tOn(max} o.3/l~~~&;) ,,.:,, .. ,(~~n(J$~~LVsat)tOn(max~ m~~wit~h) .?.`? `"~ louttonNripple( ,t:>+@ 49,`~:s',,."f p-p) . `+ "~+ ,~i.s,i.s:i::sli<iy:k. V~at = Saturation voltage of the output switch. VF = Forward voltage drop of the output rectifier. ,,.,.,<~+.. `-.'$, ,>?:{;* >,t.:,.R.\ ,,..$>+,.\ a<& .,,.,. The following power supply charaderistics must be chosen: \ .,. .*, ;$ ,,.,, ,:L~.,, . ? ~n -- Nominal input voltage. -~~>i.~, ,.,!} ~..~}::~ lVoutl = 1.25 (1 + R2/Rl ) ,,\a `\:Vout -- Desired output voltage, ....!. ,.> .'~:k, Iout -- Desired output current. fmin -- Minimum desired output switching frequency at th~~$~$~cted values of Vin and 10. VriPPie(P.P) -- Desired peak-to-peak output ripple voltag@Y t~i$practice, the calculated capacitor value will need to seri~,-~ance and board layout. The ripple voltage should be be increased due to its equivalent the line and load regulation. kept to a low value since it will directf~~kct .}.,. MOTOROLA Semiconductor 9 Products Inc. FIGURE 13 -- PRINTED CIRCUIT BOARD AND COMPONENT (CIRCUITS OF FIGURES 7,9, MYOUT 11) (Top view, copper foil as seen through the board from *Optional `;~), ,'~.+,,,u ~::\* y Indutiance Converter Turns~re (pH) Step-Up 170 38 Turns of #22 AWG Step-Down 220 48 Turns of #22 AWG I Voltage-Inverting I I 88 All inductors are wound on Magnetics MOTOROLA @ 28 Turns of #22 AWG Inc. 55117 toroidal core. Semiconductor 8 Filter. Products Inc. I FIGURE 11-- VOLTAGE INVERTING CONVERTER ~----- ------------------------- 1! -d 1 *I `1 [pk CT Osc 1= 13 , I m" RI .,,$,, ,~:: < >}?{>] Condi,#o~ Test ?'- Results 3.0 mV = *0.012Y0 Line Regulation Vin = 4.5 V t~~~~~f~ Load Regulation Vin = 5.0 V, 10J~"10 to 100 mA Output Ripple Vin = .@.OV,~O = 100 mA 500 mVp-p Short Circuit Current Vin{~ 910 mA Eticiency `&)QV, RL = 0.1 Q ,,>fl@,~~.O Output Ripple With Optional : #~: $ip'~ Filter .$${i~ .?~+,.,.-, .:., ~!:. :~.,', S!*., -h!,> ~\ *J`"*; ,$i .$%,,,..,+ = 100 mA v, 10 = 100 mA 5,0 V, 10 = 100 mA 0.022 v = to.09Y0 64.570 70 mVp-p FIGU~,J&/&EXTERNAL CURRENT BOOST CONNECTIONS ,~::,!:t, ~ +l$t*,x,><\!: FOR tc PEAK GREATER THAN 1.5A ..8 ,.,. 12B -- EXTERNAL ~----- PNP SATURATED ------------- --- SWITCH 1 I I 81 1 II ~ I I 7[ 1 I 1= 1 I ~ I o I >------------------ ------ m ---- I L---__- ---J MOTOROLA Semiconductor 7 Vo"t 8A __________ J 1 Products Inc. -. .. . .. .. . .. . . . .------ UUTLINt DIMtNSIUNS NOTES: 1.LEAD POSITIONAL TOLERANCE: +14 o.1310005)@ lTl A@lo@l 2.DIMENSIONL TO CENTER OF LEAOS WHEN FORMED PARALLEL, 3.PAC~GE CONTOUR OPTIONALIROUND OR SOUARE CORNERS), 4.DIMENSIONSA AND B ARE DATUMS. 5.DIMENSIONINGAND TOLERANCINGPER ANSI Y14.5M, 1982. P1 SUFFIX PLASTIC DUAL-IN-LINE PACWGE CASE 626-05 ROJA = 100C# Motorola does reserves not assume the any right to make Iiabilitv arising changes out without of the further application notice under its patent rights nor the rights of others. Motorola products intended for surgical implant into the bodv or intended to support whereupon Motorola trademarks of Motorola, -- m shall determine Inc. Motorola, availability and suitability Inc. is an Equal MOTOROLA to any or use of anv products product 20912 or products Opportunity/Affirmative Semiconductor BOX to improve described reliability, herein; function neither or design. does it convev Motorola any license are not authorized for use as components in life support devices or systems or sustain life. Buyer agrees to notify Motorola of anv such intended end use of its product Employment herein or circuit PHOENIX, for the Action use intended. Motorola and @ are registered MOTOROLA INC. Employer. Products Inc. ARIZONA 85036 A SUBSIDIARY OF --