SP34063A SIPEX | Alldatasheet
Document overview
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Technical content
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator © Copyright 2005 Sipex Corporation
FEATURES
■ Supply Voltage: 3V - 36V ■ Current Limiting ■ Output Switch Current to 1.5A ■ Adjustable Output Voltage ■ Operation frequency up to 110KHz ■ Low Quiescent Current ■ Precision 2% Reference ■ Available in 8 pin NSOIC Package SP34063A
DESCRIPTION
The SP34063A is a monolithic switching regulator control circuit containing the primary functions required for DC-DC converters. This device consists of an internal temperature compensated reference, voltage comparator, controlled duty cycle oscillator with active current limit circuit, driver and high current output switch. This device was specifically designed to be used in buck, boost, and Voltage-Inverting applications with a minimum number of external components. The SP34063A is available in 8 pin NSOIC package. 1.5A Buck/Boost/Inverting DC-DC Switching Regulator
APPLICATIONS
■ Battery Charger Circuit ■ NICs/Switches/Hubs ■ ADSL Modems ■ Negative Voltage Power Supply Now Available in Lead Free Packaging TYPICAL APPLICATION CIRCUIT 4 5
8 PIN NSOIC
R B A Ipk OSC C T 1.25V Reference Regulator L2 1.0 µH VOUT Optional Filter 100 µFC2 330 µF VOUT 28V/175mAR1 47k R2 2.2k 100µF VIN = 12V RSC 0.22 R3 180 L1 150µH 1N5819 CT 1500 pF SP34063A
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator © Copyright 2005 Sipex Corporation These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. ABSOLUTE MAXIMUM RATINGS retemaraPl obmySe ulaVt inU egatloVylppuSrewoPV CC 04V egnaRegatloVtupnIrotarapmoCV RI 04ot3.0-V egatloVrotcelloChctiwSV C )hctiws(0 4V )V04=1nipV(egatloVrettimEhctiwSV E )hctiws(0 4V egatloVrettimEotrotcelloChctiwSV EC )hctiws(0 4V egatloVrotcelloCrevirDV C )revird(0 4V )2etoN(tnerruCrotcelloCrevirDI C )revird(0 01A m tnerruChctiwSI WS 5.1A egakcaPCIOSNrofscitsiretcarahClamrehTdnanoitapissiDrewoP T(noitapissiDrewoP A )Cº52=P D 526W m ecnatsiseRlamrehTR AJØ 061W /Cº erutarepmeTnoitcnuJgnitarepOT J 051C º egnaRerutarepmeTegarotST GTS 051ot56-C º )ledoMydoBnamuH(DSE- 0 002V
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator © Copyright 2005 Sipex Corporation Unless otherwise noted, the following specifications apply for VCC = +5.0V, TA = -40 to 85°C.
ELECTRICAL CHARACTERISTICS
IC driver - 7.0mA* *The 100Ω resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts Forced β of output switch: Note 1: Low duty cycle pulse technique are used during test to maintain junction temperature as close to ambient temperature as possible. Note 2: If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents (≤ 300mA) and high driver currents (≥ 30mA), it may take up to 2.0µs for it to come out of saturation. This condition will shorten the off time at frequencies 30KHz, and is magnified at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a non-Darlington configuration is used, the following output drive condition is recommended. RETEMARAPL OBMYS. NIM. PYT. XAMS TINUS NOITIDNOC rotallicsO ycneuqerFF CSO 038 35 4z HK Fn0.1=TC,V0=5niPV TA Cº52= tnerruCegrahCI GHC 038 35 4 µA V CC ,V63otV0.5= TA Cº52= tnerruCegrahcsiDI GHCSID 0810 420 92 µA V CC ,V63otV0.5= TA Cº52= tnerruCegrahCotegrahcsiD noitaR I GHCSID I/ GHC 2.55 .65 .7V ot7niP ,CC TA Cº52= egatloVesneStimiLtnerruCV )esnes(KPI 0520 030 53V mI GHC I= GHCSID T, A Cº52= )1eton(hctiwStuptuO notgnilaD,egatloVnoitarutaS )tas(ECVnoitcennoC V )TAS(EC -0 .13 .1V IWS 8,1sniP,A0.1= detcennoc )2eton(egatloVnoitarutaSV )TAS(EC -5 4.07 .0V IWS ot28=8niPR,A0.1= V CC decroF, β 02= niaGtnerruCCDh EF 055 7- IWS V,A0.1= EC ,V0.5= TA Cº52= tnerruCetatS-ffOrotcelloCI C )ffo(- 1 0.00 01 µA V EC V63= rotarapmoC egatloVdlohserhTV HT 522.10 52.15 72.1 V TA Cº52= 12.10 52.19 2.1T A Cº58otCº04-= eniLegatloVdlohserhT noitalugeR R ENILGE 4.15 V mV CC V63otV0.3= tnerruCsaiBtupnII BI 02-0 04-A nV NI V0= eciveDlatoT tnerruCylppuSI CC 4A m V CC =TC,V63otV0.5= ,Fn0.1 V=7niP CC V>5niPV, HT ≥ 10
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator © Copyright 2005 Sipex Corporation BLOCK DIAGRAM PIN DESCRIPTION niP rebmuN emaNniPn oitpircseD 1r otcelloCgnihctiwS. rotcellocrotsisnarthctiwslanretnI 2r ettimEgnihctiwS. rettimerotsisnarthctiwslanretnI 3r oticapaCgnimiT. ycneuqerfgnihctiwsehtlortnocotroticapacgnimiT 4D NG. tiucriclanretnillarofnipdnuorG 5r otarapmoC tupnIgnitrevnI .rotarapmoclanretnirofniptupnignitrevnI 6V CC ylppusegatloV 7I KP esneS nassorcapordegatlovehtgnirotinomybtupnIesneStnerruCkaeP .hctiwsehthguorhttnerruckaepehttimilotrotsiseresnesIlanretxe 8r otcelloCrevirDr otcellocrevirdegatloV S Q R B A OSC CT 1.25V Reference Regulator GND Timing Capacitor Switch Collector Driver Collector Switch Emitter IPK IPK Sense CCV Comparator Inverting Input
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator © Copyright 2005 Sipex Corporation TYPICAL BOOST CONVERTER CIRCUIT This is a typical boost converter configuration. In the steady state, if the resistor divider voltage at pin 5 is greater than the voltage in the non-inverting input, which is 1.25V determined by the internal reference, the output of the comparator will go low. At the next switching period, the output switch will not conduct and the output voltage will eventually drop below its nominal voltage until the divider voltage at pin 5 is lower than 1.25. Then the output of the comparator will go high, the output switch will be allowed to conduct. Since Vpin5 = V OUT *R2/(R1+R2) = 1.25(V), The output voltage can be decided by VOUT = 1.25V*(R1+R2)/R2(V). S Q R B A Ipk OSC C T 1.25V Reference Regulator L2 1.0 µH VOUT Optional Filter 100 µFC2 330 µF VOUT 28V/175mAR1 47k R2 2.2k 100µF VIN = 12V RSC 0.22 R3 180 L1 150µH 1N5819 CT 1500 pF SP34063A
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator © Copyright 2005 Sipex Corporation This is a typical buck converter configuration. The working process in the steady state is similar to a boost converter, Vpin5 = VOUT *R2/(R1+R2) = 1.25(V). The output voltage can be decided by VOUT = 1.25V*(R1+R2)/R2(V). TYPICAL BUCK CONVERTER CIRCUIT S Q R B A Ipk OSC C T 1.25V Reference Regulator5 L2 1.0 µH VOUT Optional Filter C3 100 µFC2 470 µF VOUT 5V/100mA R1 3.6k R2 1.2k 100µF VIN = 25V RSC 0.33 D1 1N5819 220 µH CT 470 pF SP34063A
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator © Copyright 2005 Sipex Corporation TYPICAL INVERTING CONVERTER CIRCUIT This is a typical boost converter configuration. The working process in the steady state is similar to a boost converter, the difference in this situation is that the voltage at the non-inverting pin of the comparator is equal to 1.25V +VOUT, then Vpin5 = VOUT *R2/(R1+R2) = 1.25V, + VOUT. The output voltage can be decided by VOUT = -1.25V*(R1+R2)/R1 (V). S Q R B A Ipk OSC C T 1.25V Reference Regulator L2 1.0 µH VOUT Optional Filter 100 µF 1000 µF VOUT -12V/100mAR1 953k R2 8.2k 100µF VIN = 4.5V - 6V RSC 0.24 1N5819 88 µH CT 1500 pF SP34063A
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator © Copyright 2005 Sipex Corporation PACKAGE: 8 Pin NSOIC A A1 A2 SIDE VIEW Seating Plane SECTION B-B WITH PLATING SYMBOL MIN NOM MAX A 1.35 - 1.75 A1 0.1 - 0.25 A2 1.25 - 1.65 b 0.31 - 0.51 c 0.17 - 0.24 D E e L 0.4 - 1.27 ø0 º - 8 º ø1 5º - 15º Note: Dimensions in (mm)
8 Pin NSOIC JEDEC MO-012 (AA) Variation
4.90 BSC
6.00 BSC
3.90 BSC
1.27 BSC
1.04 REF
0.25 BSC
L ØØ1 Ø Seating Plane VIEW C TO P VIEW b SEE VIEW C B B E E/2 INDEX AREA (D/2 X E1/2) E1/2 D e c BASE METAL b
Date: 1/11/05 SP34063A 1.5A Buck/Boost/Inverting DC-DC Switching Regulator © Copyright 2005 Sipex Corporation Part Number Temperature Range Package Types
ORDERING INFORMATION
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Sipex Corporation Headquarters and Sales Office
233 South Hillview Drive
Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Available in lead free packaging. To order add “-L” suffix to part number. Example: SP34063AEN/TR = standard; SP34063AEN-L/TR = lead free /TR = Tape and Reel Pack quantity is 2,500 for NSOIC. CLICK HERE TO ORDER SAMPLES