SC603 SEMTECH | Alldatasheet
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1 www.semtech.com POWER MANAGEMENT SC603 CHARGE PUMP REGULATOR WITH SELECTABLE 5.0V/4.5V OUTPUT November 2, 2004 Description Features
Applications
Typical Application Circuit The SC603 is a versatile charge pump designed for use in battery operated power supply applications. The wide input range is matched for Li-Ion battery applications. Only two tiny ceramic bucket capacitors are required, and the inductorless implementation provides a reduced-EMI solution. Low noise mode switching circuitry and con- stant output current allow the use of extremely small input and output capacitors. The SC603 charge pump regulator can be used for ap- plications that require up to 200mA of output current with a 4.5V output. The 5.0V output version provides up to 160mA of output current. Compared to a switch mode regulator, the SC603 offers a solution with less cost, area, noise and complexity. Small size - MLP Micro 10 lead 3x3mm package Selectable 5.0V or 4.5V output voltage 200mA available with 4.5V output 160mA available with 5.0V output Short circuit protection Soft Start function Shutdown current <2µA Selectable fixed frequencies of 262kHz & 650kHz Low ripple Regulated to +/-5% Ease of use Cellular phones LED photo flash for cellular phones LED backlighting PDA power supplies Portable electronics Electronic books Wireless web appliances Cin 1.0uF 2.7V to 6.5V Cbucket1 1.0uF Cbucket2 1.0uF VIN EN VSEL FSEL GND CF2- CF2+ CF1- CF1+ VOUT3 SC603 Cout 1.0uF UP TO 10 LEDS 4.5V or 5.0V
2 2004 Semtech Corp. www.semtech.com SC603 POWER MANAGEMENT Absolute Maximum Ratings
Electrical Characteristics
retemaraPl obmySm umixaMs tinU egatloVylppuSV NI 0.7+ot3.0-V egatloVtuptuOV TUO 0.7+ot3.0-V V TUO noitaruDtiucriCtrohSC Se tinifednI oTnoitcnuJ,ecnatsiseRlamrehT tneibmA )dohteMdradnatS15DSEJ( θ AJ 13W /C° tneibmAgnitarepOT A 58+ot04-C ° egnaRerutarepmeTnoitcnuJT CJ 051+ot04-C ° egnaRerutarepmeTegarotST GTS 051+ot56-C ° erutarepmeTwolfeRRIkaeP RTLMI306CS T DAEL 042C ° erutarepmeTwolfeRRIkaeP TRTLMI306CS T DAEL 062C ° retemaraPl obmySs noitidnoCN IMP YTX AMs tinU egatloVylppuStupnIV NI 5.25 .6V tnerruCtnecseiuQI Q I,zHk262=.qerF TUO V,Am0= NI V7.3=0 .14 .1A m I,zHk056=.qerF TUO V,Am0= NI V7.3=1 .28 .2A m 0=elbanE2 A µ egatloVtuptuOV TUO htiwnoitalugeRdaoLcitatS 1=LESV 57.40 .55 2.5V htiwnoitalugeRdaoLcitatS 0=LESV 572.45 .45 27.4V tnerruCtuptuOI TUO V<V2.3,1=LESV NI V5.5<0 51A m V<V2.3,1=LESV NI V5.5< TA 04-= o 07otC oC 061A m V<V2.3,0=LESV NI V5.5<0 91A m V<V2.3,0=LESV NI V5.5< TA 04-= o 07otC oC 002A m V<V58.2,1=LESV NI V5.5<0 6A m V<V58.2,0=LESV NI V5.5<0 21A m Unless specified: TA = -40°C to 85°C, C IN BUCKET = 1.0µF (ESR = 0.1 Ω), C OUT =1.0µF (ESR = 0.1 Ω), V IN = 2.85V to 5.5V
3 2004 Semtech Corp. www.semtech.com SC603 POWER MANAGEMENT Note: (1) Peak to peak output ripple voltage with C OUT=CBUCKET=1µF and X5R dielectric (2) Guaranteed by design (3) This device is ESD sensitive. Use of standard ESD handling precautions is required. retemaraPl obmySs noitidnoCN IMP YTX AMs tinU ycneuqerFpmuP f PMUP 0=LESF,1=elbanE% 51-2 62% 51+z Hk 1=LESF,1=elbanE% 02-0 56% 02+z Hk emiTnoitisnarTedoMycneuqerF T KCOLC ycneuqerfenomorfemitnoitisnarT edomycneuqerfrehtoynaotedom ngisedybdeetnaraug 1d oireP tnerruCtiucriCtrohSI CS V TUO I,V0= TUO I= NI 006A m dlohserhThgiHtupnIV HI )LESF,LESV,elbanE(sniptupnillA3 .1V dlohserhTwoLtupnIV LI )LESF,LESV,elbanE(sniptupnillA4 .0V tnerruChgiHtupnII HI )LESF,LESV,elbanE(sniptupnillA0 1A µ tnerruCwoLtupnII LI )LESF,LESV,elbanE(sniptupnillA0 1A µ otyrettaBmorfycneiciffErewoP tuptuOpmuPegrahCdetalugeR η V NI V,V3.3= TUO I,V0.5= TUO Am06= zHk262=.qerF 0.57% V NI V,V3.3= TUO I,V0.5= TUO Am06= zHk056=.qerF 5.47% egatloVelppiRtuptuOV PP I,zHk262=qerf TUO Am06= )2(,)1( 525 4V m Unless specified: TA = -40°C to 85°C, C IN BUCKET = 1.0µF (ESR = 0.1 Ω), C OUT =1.0µF (ESR = 0.1 Ω), V IN = 2.85V to 5.5V
4 2004 Semtech Corp. www.semtech.com SC603 POWER MANAGEMENT Pin Configuration CF1+ TOP VIEW VOUT VIN FSEL VSEL CF1- GND CF2+ CF2- EN Block Diagram ECIVEDE GAKCAP )1( TRTLMI306CS )2( mm3x301-PLM RTLMI306CSm m3x301-PLM BVE306CSd raoBnoitaulavE
Ordering Information
Note: (1) Available in tape and reel only. A reel contains 3000 devices. (2) Lead free product. Pin Descriptions niPe maNniPn oitcnuFniP 1T UOVV 5.4roV0.5otdetalugeregatlovtuptuO 2+ 1FC1 roticapactekcubfolanimretevitisoP 3N IVV 5.6otV5.2morfgnignaregatlovtupnI 4L ESF ;zHk262=qerf,0=LESF.ycneuqerflanoitarepoehtgnitcelesroftupnicigoL zHk056=qerf,1=LESF 5L ESV ,0=LESV;V5=TUOV,1=LESV.egatlovtuptuoehtgnitcelesroftupnicigoL V5.4=TUOV 6N E .woltesnehwAu2nahtsselsitnerrucsaiB.elbanehgihevitcA 7- 2FC2 roticapactekcubfolanimretevitageN 8D NGd nuorG 9- 1FC1 roticapactekcubfolanimretevitageN 01+ 2FC2 roticapactekcubfolanimretevitisoP Td aPlamrehT toN.saivelpitlumgnisuenalpdnuorgottcennoC.sesoprupgniknistaehrofdaP .yllanretnidetcennoc MLP10: 3X3 10 LEAD EN FSEL VSEL GND VIN MODE SELECT DRIVERS SWITCH BLOCK TIMER COMPARATORSVIN VOUT VREF VIN CF1+ CF1- CF2+ CF2- VOUT EN OSC 650kHz or 262kHz 5.0V or 4.5V T
5 2004 Semtech Corp. www.semtech.com SC603 POWER MANAGEMENT η VO I O⋅ VIN 2I O⋅ I Q+()⋅ Applications Information Charge Pump Function for Low Ripple The SC603 uses a voltage doubler circuit which is imple- mented with two switched or ‘bucket’ capactors. Most charge pump doublers use only one bucket capacitor. Two bucket capacitors switching on alternate phases greatly reduce the output ripple voltage. Over-Voltage Protection for Low Voltage Capacitors The output is prevented from exceeding 6.0V. This fea- ture allows the use of 6.3V ceramic capacitors. Comparison with Other Regulation Methods In many instances, a charge pump regulator is the best choice for portable power applications. These regula- tors offer many advantages over switch mode regula- tors. A smaller bill of materials, less layout area, lower component height, less noise, no EMF, and less overall circuit cost are typical reasons to use this type of regula- tion. The efficiency of a charge pump regulator often approaches and in some cases exceeds the efficiency of a switch mode regulator. Inductors are often the largest and most expensive dis- crete component in a design. There are no inductors used in the SC603, so the inductor’s cost and layout area are eliminated. The noise and EMF associated with the inductor are also eliminated. The SC603’s fixed frequency harmonics are an advan- tage in portable communications equipment, such as cellular telephones. The SC603 has distinct frequen- cies of operation, so the harmonics are predictable. The harmonics are not fixed in a switch mode regulator. Switch mode regulators have harmonics which vary due to the pulse width modulation used to regulate the out- put. Varying harmonics can be a problem because it may be more difficult to ensure acceptable noise perfor- mance over the entire operating range. Many switch mode regulators have increased voltage ripple on the output during pulse skipping mode due to the fact that there are large periods of time when no current is supplied to the output. The SC603 supplies current to the output continuously, so the voltage ripple is less than a switch mode regulator, even with greatly reduced output capacitance. Frequency Selection The FSEL input is for frequency selection. A logic High level at this input will set the clock frequency to 650kHz, while a logic Low sets the clock to 262kHz. Input from a µP or other device may be used to change the charge pump frequency at any time. The optimal frequency will depend upon the capacitor values, the load current, and the exceptable amount of output ripple. Ripple Performance Examples of the output ripple, charge pump frequency and capacitor size are listed in Table 2 Ripple P erfor- mance. Efficiency Efficiency for the SC603 is defined as, where V O = output voltage IO = output current VIN = input voltage IQ = quiescent current [from Electrical Charac- teristics on page 2]
6 2004 Semtech Corp. www.semtech.com SC603 POWER MANAGEMENT rerutcafunaMr ebmuNtraP] Fu[ecnaticapaCe pyTcirtceleiDe ziSegakcaPAIE egatloV gnitaR XVAK 501CZ50800 .1R 7X5 080V 01 cinosanaPK 501J0BV1JCE0 .1R 5X2 040V 3.6 KDT5 01A1R5X8061C0 .1R 5X3 060V 01 KDTZ 601A1V5Y2021C0 .1R 5X5 080V 01 Table 2 -Ripple P erformance V TUO ]zHk[.qerF] Am[tuoI ]p-pVm[elppiRtupuO C TUO ]Fu[C TEKCUB ]Fu[ V0.5 2620 015 21 1 0560 015 11 1 2620 510 51 1 0560 515 21 1 V5.4 2620 015 21 1 0560 015 11 1 2620 020 61 1 0560 020 31 1 Calculating Power Dissipation The power dissipated by the SC603 is calculated as, Short Circuit and Over Temperature Protection The output is current limited to 600mA to protect against short circuit conditions. Over temperature protection is also provided. Design and Layout Considerations The layout should be patterned after the evaluation board gerber plots shown on page 10. The center pad “ther- mal slug” is not internally connected to ground, but is connected to ground in the layout through a via centered on the pad and connecting to the ground plane. Pin 8 is then routed directly to the center pad. A good ground plane connection is important to make effective use of the low thermal resistance of the MLP package. P IN P OUT−P D P D V IN 2 I O⋅ I Q+( )⋅ V O I O⋅− Suggested Capacitors Table 3 is a short list of some of the manufacturers and types of multilayer ceramic capacitors that are suggested for the SC603.Table 3 -Sugges ted Capacitors
7 2004 Semtech Corp. www.semtech.com SC603 POWER MANAGEMENT Typical Characteristics Efficiency vs. Line Voltage 40.0% 45.0% 50.0% 55.0% 60.0% 65.0% 70.0% 75.0% 80.0% 85.0% 5V, 150mA Output 4.5V, 200mA Output Efficiency vs. Load 0.0% 10.0% 20.0% 30.0% 40.0% 50.0% 60.0% 70.0% 80.0% Load Current [mA] Efficiency [%] 5V Output, 3.8V Input 5V Output, 3.2V Input 4.5V Output, 3.8V Input 4.5V Output, 3.2V Input Load Regulation 4.300 4.400 4.500 4.600 4.700 4.800 4.900 5.000 Load Current [mA] Output Voltage [V] 5V Output, 3.8V Input 4.5V Output, 3.8V Input 5V Output, 3.2V Input 4.5V Output, 3.2V Input Line Regulation 4.200 4.300 4.400 4.500 4.600 4.700 4.800 4.900 5.000 Input Voltage [V] Output Voltage [V] 5V, 150mA Output 4.5V, 200mA Output Efficiency vs. Input Voltage Load Regulation Efficiency vs. Load Current Line Regulation
8 2004 Semtech Corp. www.semtech.com SC603 POWER MANAGEMENT Quiescent Currrent 0.500 0.700 0.900 1.100 1.300 1.500 1.700 1.900 2.100 2.300 2.500 Input Voltage [V] Quiescent Current [mA] Vo=4.5, 262kHz Vo=5.0V, 262kHz Vo=4.5V, 650kHz Vo=5.0V, 650kHz Quiescent Current Ripple for 150mA, 5V Output Startup Conditions for 4.5V Output Startup Conditions for 5.0V Output 100Hz PWM for 4.5V Application 100Hz PWM for 5.0V Application
9 2004 Semtech Corp. www.semtech.com SC603 POWER MANAGEMENT Evaluation Board Schematic Evaluation Board Schematic The evaluation board has a monostable multivibrator cir- cuit to provide a pulse for demonstrating the flash circuit function. Remove jumpers JP4 and JP5 to disable the timing circuit when not in use to save battery current used by R11 through the 555 IC. To adjust the pulse on- time, adjust potentiometer R11. To activate the flash circuit, depress switch S1.
10 2004 Semtech Corp. www.semtech.com SC603 POWER MANAGEMENT Evaluation Board Bill of Materials Evaluation Board Gerber Plots ReferenceReferenceReferenceReferenceReference ValueValueValueValueValue CommentCommentCommentCommentComment U1 SC603 MLP -Micro 10 lead 3x3mm. C1, C2, C3, C4 1.0uF Ceramic, low ESR type, voltage of 6.3V rating is acceptable for all capacitors. C5 10uF This extra capacitor supports usage of long power leads from a benchtop supply. R1 through R10 - Add limiting resistors to meet the requirements of the application on 0805 pads. D1 through D10 - Add white or blue LEDs to meet the requirements of the application on 1206 pads. yyww = Datecode (Example: 0452) Top Marking Marking Information Top View Bottom View 603 yyww
11 2004 Semtech Corp. www.semtech.com SC603 POWER MANAGEMENT Contact Information Land Pattern- MLP-Micro 10 Outline Drawing - MLP-10 MIN aaa bbb b e L N D C E A DIM MILLIMETERS NOM DIMENSIONS MAXNOM INCHES MIN MAX (LASER MARK) INDICATOR PIN 1 N NOTES: CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS TERMINALS.2. .003 .007 .042 .009 .048 .000 .031 (.008) 0.08 0.23 .011 .052 0.18 1.06 .039 .002 0.00 0.80 1.31 0.30 1.21 0.05 1.00 (0.20) .004 0.10 0.50 BSC.020 BSC A aaa C SEATING PLANE A bxN bbb C A B B e C C D LxN E E
12 2004 Semtech Corp. www.semtech.com SC603 POWER MANAGEMENT Land Pattern - MLP-10 Semtech Corporation Power Management Products Division
200 Flynn Road, Camarillo, CA 93012
Phone: (805)498-2111 FAX (805)498-3804 Contact Information .087 .055 2.20 1.40 .150 .020 .012 .037 3.80 0.30 0.95 0.50 (.112) .075 1.90 (2.85) K H X THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. NOTES: INCHES DIMENSIONS G K H X Y P Z C DIM MILLIMETERS Y ZG(C) P