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Power Supply CircuitsIn Brief . . .PageIn most electronic systems, some form of voltageregulation is required. In the past, the task of voltageregulator design was tediously accomplished with discretedevices, and the results were quite often complex and costly.Today, with bipolar monolithic regulators, this task has beensignificantly simplified. The designer now has a wide choiceof fixed, low VDiff and adjustable type voltage regulators.These devices incorporate many built–in protectionfeatures, making them virtually immune to the catastrophicfailures encountered in older discrete designs.The switching power supply continues to increase inpopularity and is one of the fastest growing markets in theworld of power conversion. They offer the designer severalimportant advantages over linear series–pass regulators.These advantages include significant advancements in theareas of size and weight reduction, improved efficiency, andthe ability to perform voltage step–up, step–down, andvoltage–inverting functions. Motorola offers a diverseportfolio of full featured switching regulator control circuitswhich meet the needs of today’s modern compact electronicequipment.Power supplies, MPU/MCU–based systems, industrialcontrols, computer systems and many other productapplications are requiring power supervisory functionswhich monitor voltages to ensure proper system operation.Motorola offers a wide range of power supervisory circuitsthat fulfill these needs in a cost effective and efficientmanner. MOSFET drivers are also provided to enhance thedrive capabilities of first generation switching regulators orsystems designed with CMOS/TTL logic devices. Thesedrivers can also be used in dc–to–dc converters, motorcontrollers or virtually any other application requiring highspeed operation of power MOSFETs.Motorola Master Selection Guide4.2–1Linear Voltage Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–2Fixed Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–2Adjustable Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–4Micropower Voltage Regulators for Portable Applications . . . 4.2–580 mA Micropower Voltage Regulator . . . . . . . . . . . . . . . . . 4.2–5120 mA Micropower Voltage Regulator . . . . . . . . . . . . . . . . 4.2–6Micropower Voltage Regulator forExternal Power Transistor . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–6Low Noise 150 mA Low Drop Out (LDO) LinearVoltage Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–7Micropower smallCAP Voltage Regulators withOn/Off Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–8Special Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–9Voltage Regulator/Supervisory . . . . . . . . . . . . . . . . . . . . . . . 4.2–9SCSI Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–13Switching Regulator Control Circuits . . . . . . . . . . . . . . . . . . . . 4.2–14Single–Ended . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–14Single–Ended with On–Chip Power Switch . . . . . . . . . . . . 4.2–16Very High Voltage Single–Ended withOn–Chip Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–17Double–Ended . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–17CMOS Micropower DC–to–DC Converters . . . . . . . . . . . . 4.2–19Synchronous Rectification DC/DC ConverterProgrammable Integrated Controller . . . . . . . . . . . . . . . . . 4.2–21Easy Switcher Single–Ended with On–ChipPower Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–23Single–Ended GreenLine Controllers . . . . . . . . . . . . . . . 4.2–25Very High Voltage Switching Regulator . . . . . . . . . . . . . . . 4.2–27High Voltage Switching Regulator . . . . . . . . . . . . . . . . . . . . 4.2–29Critical Conduction SMPS Controller . . . . . . . . . . . . . . . . . 4.2–30High Voltage Switching Regulator . . . . . . . . . . . . . . . . . . . . 4.2–31Special Switching Regulator Controllers . . . . . . . . . . . . . . . . . 4.2–32Dual Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–32Universal Microprocessor Power Supply . . . . . . . . . . . . . . 4.2–32Power Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–33Supervisory Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–36Overvoltage Crowbar Sensing . . . . . . . . . . . . . . . . . . . . . . . 4.2–36Over/Undervoltage Protection . . . . . . . . . . . . . . . . . . . . . . . 4.2–36Micropower Undervoltage Sensing . . . . . . . . . . . . . . . . . . . 4.2–37Micropower Undervoltage Sensing withProgrammable Output Delay . . . . . . . . . . . . . . . . . . . . . . . 4.2–38Undervoltage Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–39Universal Voltage Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–40Battery Management Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–41Battery Charger ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–41Battery Pack ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–43Power Supply and Management IC for HandheldElectronic Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–48MOSFET/IGBT Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–50High Speed Dual Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–50Single IGBT Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–50Package Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2–52Analog and Interface Integrated Circuits
Linear Voltage RegulatorsFixed OutputThese low cost monolithic circuits provide positive and/ornegative regulation at currents from 100 mA to 3.0 A. They areideal for on–card regulation employing current limiting andthermal shutdown. Low VDiff devices are offered for batterypowered systems.Although designed primarily as fixed voltage regulators,these devices can be used with external components to obtainadjustable voltages and currents.Table 1. Linear Voltage RegulatorsDeviceVout25 CTol. %VinMaxVin–VoutDiff.Typ.ReglineMax(% Vout)RegloadMax(% Vout)Typ. Temp.CoefficientmV (Vout) CSuffix/PackageFixed Voltage, 3–Terminal Regulators, 0.1 751,D2T/936,DT, DT–1,T/221A, 8LXXC/AC/AB*5.0, 8.0, 9.08.0/4.0301.74.0/3.01.20.2D/751, P/29MC78LXXC/AC/AB*12, 15, 188.0/4.0351.72.01.00.2D/751, P/29MC78L24C/AC/AB*248.0/4.0401.72.01.00.2D/751, D/751, P/29MC79LXXC/AC/AB*–(12, 15, 18)8.0/4.0351.72.01.00.2D/751, , P/29MC33160**5.05.0402.00.81.0–P/626Fixed Voltage, 3–Terminal Regulators, 0.5 AmperesMC78MXXB*/C5.0, 6.0, 8.0, 124.0352.01.02.0 0.04DT, DT–1,T/221AMC78MXXB*/C15, 184.0352.01.02.0 0.04DT, DT–1,T/221AMC78MXXB*/C20, 244.0402.00.252.0 0.04DT, DT–1,T/221AMC79MXXB*/C–(5.0, 8.0, 12, 15)4.0351.11.02.0–0.07 to 0.04DT, , TVMC33267*Fixed Voltage, 3–Terminal Medium Dropout Regulators, 0.8 AmperesMC33269–XX*MC342683.3, 5.0, 121.0201.00.31.0–D/751, DT,T/221A, ST2.851.0150.950.31.0–D/751, DTUnless otherwise noted, TJ 0 to 125 C* TJ –40 to 125 C** TA –40 to 85 CAnalog and Interface Integrated Circuits4.2–2Motorola Master Selection Guide
Table 1. Linear Voltage Regulators (continued)25 CTol. %VoutDeviceVinMaxVin–VoutDiff.Typ.ReglineMax(% Vout)RegloadMax(% Vout)Typ. Temp.CoefficientmV (Vout) CSuffix/PackageFixed Voltage, 3–Terminal Regulators, 1.0 AmperesMC78XXB*/C/AC5.0, 6.0, 8.0, 12,184.0/2.0352.02.0/1.02.0–0.06 , 5.2, XXC/AC–(8.0, 12, 15, 18)4.0/2.0352.02.0/1.02.0/1.25–0.12 2T/936,T/221A5.0, 6.0, 12, 15, 184.0/2.0351.71.0/0.21.0/0.5 0.12T/221A244.0401.71.01.0 0.12T/221SMC7924CLM340/A–XXLM340–24Fixed Voltage, 3–Terminal Regulators, 3.0 AmperesMC78TXXC/AC5.0, 8.0, 2.0/1.0 0.2T/221AUnless otherwise noted, TJ 0 to 125 C* TJ –40 to 125 C** TA –40 to 85 CTable 2. Fixed Voltage Medium and Low Dropout RegulatorsDevice25 CTol. % Vout)RegloadMax(% Vout)Typ.Temp.CoefficientmV (Vout) C–Suffix/PackageFixed Voltage, Medium Dropout 51.0800150.950.31.0201.0MC33269–XX*3.3, 5.0, 12D2T/936A,T/314D,TVD/751, DTD/751, DT,T/221A,ST/318EFixed Voltage, Low Dropout RegulatorsLM2931*/A*5.05.0/3.8100370.161.121.0 2.5D/751,D2T/936A,DT, DT–1,T/221A, 5.0Unless otherwise noted, TJ 0 to 125 C* TJ –40 to 125 CMotorola Master Selection Guide4.2–3Analog and Interface Integrated Circuits
Table 2. Fixed Voltage Medium and Low Dropout Regulators (continued)DeviceVout25 CTol. %IO(mA)MaxVinMaxVin–VoutDiff.Typ.ReglineMax(% Vout)RegloadMax(% Vout)Typ.Temp.CoefficientmV (Vout) C10028.750.380.04/0.020.04/0.02 1.0Suffix/PackageFixed Voltage, Low Dropout .0500/10600.45/0.551.01.0–D2T/936A,T/314D,TH, TVUnless otherwise noted, TJ 0 to 125 C* TJ –40 to 125 CAdjustable OutputMotorola offers a broad line of adjustable output voltageregulators with a variety of output current capabilities.Adjustable voltage regulators provide users the capability ofstocking a single integrated circuit offering a wide range ofoutput voltages for industrial and communicationsapplications. The three–terminal devices require only twoexternal resistors to set the output voltage.Table 3. Adjustable Output RegulatorsVin–VoutDiff.Typ.ReglineMax(% Vout)RegloadMax(% Vout)Typ. Temp.CoefficientmV (Vout) CSuffix/Package401.90.071.5 0.35D/751, Z370.161.121.0 2.5D/751,D2T/936A,T/314D,TH, TV28.750.380.04/0.020.04/0.02 2951C*/AC*1.25–29100DeviceAdjustable 51,DM/846A,N/626Unless otherwise noted, TJ 0 to 125 C* TJ –40 to 125 C# TA 0 to 70 CAnalog and Interface Integrated Circuits4.2–4Motorola Master Selection Guide
Table 3. Adjustable Output Regulators (continued)VinMaxVin–VoutDiff.Typ.ReglineMax(% Vout)RegloadMax(% Vout)Typ. Temp.CoefficientmV (Vout) C150382.50.50.2 0.033D/751,P/6461.2–37500402.10.040.5 0.35DT, DT–1,T/221ALM337M/B*–(1.2–37)500401.90.071.5 0.3T/221AMC33269*1.25–1980018.751.00.30.5 0.4D/751, DT,T/221A, STLM317/B*1.2–371500402.250.071.5 071.5 0.3D2T/936,T/221ALM350/B*1.2–333000352.70.071.5 iceSuffix/PackageAdjustable RegulatorsUnless otherwise noted, TJ 0 to 125 C* TJ –40 to 125 C# TA 0 to 70 CMicropower Voltage Regulators for Portable Applications80 mA Micropower Voltage RegulatorMC78LC00H, NORDERING 8LC33NTRMC78LC40NTRMC78LC50NTR3.03.34.05.0TA –30 to 80 C, Case 1213, 1212The MC78LC00 series voltage regulators are specificallydesigned for use as a power source for video instruments,handheld communication equipment, and battery poweredequipment.The MC78LC00 series features an ultra–low quiescentcurrent of 1.1 µA and a high accuracy output voltage. Eachdevice contains a voltage reference, an error amplifier, adriver transistor and resistors for setting the output voltage.These devices are available in either SOT–89, 3 pin, orSOT–23, 5 pin, surface mount packages.OperatingTemperature RangePackageSOT 89SOT–89TA –30 30 to 80 C80 CSOT 23SOT–23Other voltages from 2.0 to 6.0 V, in 0.1 V increments, are available uponrequest. Consult factory for information.MC78LC00 Series Features: Low Quiescent Current of 1.1 µA Typical Low Dropout Voltage (220 mV at 10 mA) Excellent Line Regulation (0.1%)23VinVO High Accuracy Output Voltage ( 2.5%) Wide Output Voltage Range (2.0 V to 6.0 V) Output Current for Low Power (up to 80 mA) Two Surface Mount Packages (SOT–89, 3 Pin, orSOT–23, 5 Pin)Vref1GndMotorola Master Selection Guide4.2–5Analog and Interface Integrated Circuits
Micropower Voltage Regulators for Portable Applications (continued)120 mA Micropower Voltage RegulatorMC78FC00HTA –30 to 80 C, Case 1213The MC78FC00 series voltage regulators are specificallydesigned for use as a power source for video instruments,handheld communication equipment, and battery poweredequipment.The MC78FC00 series voltage regulator ICs feature a highaccuracy output voltage and ultra–low quiescent current.Each device contains a voltage reference unit, an erroramplifier, a driver transistor, and resistors for setting outputvoltage, and a current limit circuit. These devices are available in SOT–89 surface mount packages, and allowconstruction of an efficient, constant voltage power supplycircuit.ORDERING MC78FC50HT1OutputVoltageOperatingTemperature RangePackage3.03.34.05.030 to 80 C80 CTA –30 SOT 89SOT–89Other voltages from 2.0 to 6.0 V, in 0.1 V increments, are available uponrequest. Consult factory for information.23VinVOMC78FC00 Series Features: Ultra–Low Quiescent Current of 1.1 µA Typical Ultra–Low Dropout Voltage (100 mV at 10 mA) Large Output Current (up to 120 mA) Excellent Line Regulation (0.1%) Wide Operating Voltage Range (2.0 V to 10 V)Vref High Accuracy Output Voltage ( 2.5%) Wide Output Voltage Range (2.0 V to 6.0 V)1 Surface Mount Package (SOT–89)GndMicropower Voltage Regulator for External Power TransistorMC78BC00NTA –30 to 80 C, Case 1212The MC78BC00 voltage regulators are specificallydesigned to be used with an external power transistor todeliver high current with high voltage accuracy and lowquiescent current.The MC78BC00 series are devices suitable for constructing regulators with ultra–low dropout voltage and output current in the range of several tens of mA to hundreds of mA.These devices have a chip enable function, which minimizesthe standby mode current drain. Each of these devices contains a voltage reference unit, an error amplifier, a driver transistor and feedback resistors. These devices are available inthe SOT–23, 5 pin surface mount packages.These devices are ideally suited for battery poweredequipment, and power sources for hand–held audio instruments, communication equipment and domestic appliances.ORDERING MC78BC50NTROutputVoltageOperatingTemperature RangePackage3.03.34.05.030 to 80 C80 CTA –30 SOT 23SOT–23Other voltages from 2.0 to 6.0 V, in 0.1 V increments, are available uponrequest. Consult factory for information.Ext243VinVOMC78BC00 Series Features: Ultra–Low Supply Current (50 µA) Standby Mode (0.2 µA) Ultra–Low Dropout Voltage (0.1 V with ExternalTransistor and IO 100 mA)Vref1 Excellent Line Regulation (Typically 0.1%/V)Gnd High Accuracy Output Voltage ( 2.5%)Analog and Interface Integrated CircuitsCE4.2–65Motorola Master Selection Guide
Micropower Voltage Regulators for Portable Applications (continued)Low Noise 150 mA Low Drop Out (LDO) Linear Voltage RegulatorMC78PC00TA –40 to 85 C, Case 1212The MC78PC00 are a series of CMOS linear voltage regulators with high output voltage accuracy, low supply current,low dropout voltage, and high Ripple Rejection. Each ofthese voltage regulators consists of an internal voltage reference, an error amplifier, resistors, a current limiting circuitand a chip enable circuit.The dynamic Response to line and load is fast, whichmakes these products ideally suited for use in hand–heldcommunication equipment.The MC78PC00 series are housed in the SOT–23 5 leadpackage, for maximum board space saving. Excellent Line Regulation: typical 0.05%/V High Accuracy Output Voltage: 2.0% Fast Dynamic Response to Line and Load Small Package: SOT–23 5 leads Built–in Chip Enable circuit (CE input pin) Similar Pinout to the LP2980/1/2 and MIC5205ORDERING INFORMATIONMC78PC00 Series Features: Ultra–Low Supply Current: typical 35 mA in ON mode withno load Standby Mode: typical 0.1 mA Low Dropout Voltage: typical 0.2 V @ IOUT 100 mA High Ripple Rejection: typical 70 dB @ f 1 NTROperatingTemperature RangePackage40 to 85 C85 CTA –40 SOT 23SOT–235 LeadsL dOther voltages are available. Consult your Motorola representative. Low Temperature–Drift Coefficient of Output Voltage:typical 100 ppm/ CBlock DiagramVINMC78PCxx1VOUTVrefCURRENT LIMIT23CEMotorola Master Selection Guide54.2–7GNDAnalog and Interface Integrated Circuits
Micropower Voltage Regulators for Portable Applications (continued)Micropower smallCAP Voltage Regulators with On/Off ControlMC33264D, DMTA –40 to 85 C, Case 751, 846A Internal Current and Thermal LimitingThe MC33264 series are micropower low dropout voltageregulators available in SO–8 and Micro–8 surface mountpackages and a wide range of output voltages. These devices feature a very low quiescent current (100 µA in the ONmode; 0.1 µA in the OFF mode), and are capable of supplying output currents up to 100 mA. Internal current and thermal limiting protection is provided. They require only a smalloutput capacitance for stability.Additionally, the MC33264 has either active HIGH or active LOW control (Pins 2 and 3) that allows a logic level signalto turn–off or turn–on the regulator output.Due to the low input–to–output voltage differential andbias current specifications, these devices are ideally suitedfor battery powered computer, consumer, and industrialequipment where an extension of useful battery life is desirable. Logic Level ON/OFF Control Functionally Equivalent to TK115XXMC and LP2980ORDERING INFORMATIONOperatingTemperature 264D–5.0MC33264 Features:SO 8SO–8TA –40 40 to 85 C85 M–5.0 Low Quiescent Current (0.3 µA in OFF Mode; 95 µA inON Mode) Low Input–to–Output Voltage Differential of 47 mV at10 mA, and 131 mV at 50 mA Multiple Output Voltages Available Extremely Tight Line and Load RegulationPackageMicro–8Mi8 Stable with Output Capacitance of Only0.22 µF for 4.0 V, 4.75 V and 5.0 V Output Voltages0.33 µF for 2.8 V, 3.0 V, 3.3 V and 3.8 V Output Voltages18VinVOThermal andAnti–SatProtection27BaseOn/OffRint5Adj1.23 VVref352.5 kMC33264On/OffAnalog and Interface Integrated Circuits6Gnd4.2–8Motorola Master Selection Guide
Special RegulatorsVoltage Regulator/SupervisoryTable 4. Voltage Regulator/SupervisoryVout(V)Vin(V)DeviceD ne(mV) MaxRegload(mV) MaxTA( C)Suffix/Package3.27.0n/a30–30 to 60D/751B0 to 70P/648C,DW/751G7.0404050MC33160–40 to 85MC332674.95.25006.0265050–40 to 105T/314D,TH, TVMC33169*4.76.4–2.79.5–––40 to 85DTB/948G6.47.0–2.35–2.65*These ICs are intended for powering cellular phone GaAs power amplifiers and can be used for other portable applications as well.Motorola Master Selection Guide4.2–9Analog and Interface Integrated Circuits
Voltage Regulator/Supervisory (continued)Microprocessor Voltage Regulator and Supervisory CircuitMC34160P, DWTA 0 to 70 C, Case 648C, 751GMC33160P, DWTA –40 to 85 C, Case 648C, 751GThe MC34160 series is a voltageregulator and supervisory circuit containing many of the necessary monitoringfunctions required in microprocessorbased systems. It is specifically designedfor appliance and industrial applicationsoffering the designer a cost effectivesolution with minimal external components.These integrated circuits feature a 5.0 V,100 mA regulator with short circuit currentlimiting, pinned out 2.6 V bandgapreference, low voltage reset comparator,power warning comparator with programmable hysteresis, and an uncommittedcomparator ideally suited for microprocessor line synchronization.Additional features include a chip disableinput for low standby current, and internalthermal shutdown for over temperatureprotection.These devices are contained in a 16 pindual–in–line heat tab plastic package forimproved thermal conduction.VCC14Regulator11 Output0.913RThermalShutdown0.01R7ResetRChipDisable 152.6 VReferenceReference16 OutputPowerSense 98PowerWarning6ComparatorOutputIHHysteresisAdjust 10IH “On”/“Off”NoninvertingInput 2InvertingInput 1Gnd4, 5,12, 13Low Dropout RegulatorMC33267T, TVTJ –40 to 105 C, Case 314D, 314BThe MC33267 is a positive fixed 5.0 Vregulator that is specifically designed tomaintain proper voltage regulation with anextremely low input–to–output voltagedifferential. This device is capable ofsupplying output currents in excess of 500mA and contains internal current limiting andthermal shutdown protection. Also featuredis an on–chip power–up reset circuit that isideally suited for use in microprocessorbased systems. Whenever the regulatoroutput voltage is below nominal, the resetoutput is held low. A programmable timedelay is initiated after the regulator hasreached its nominal level and upon timeout,the reset output is released.Due to the low dropout voltagespecifications, the MC33267 is ideallysuited for use in battery powered industrialand consumer equipment where anextension of useful battery life is desirable.This device is contained in an economicalfive lead TO–220 type package.Analog and Interface Integrated CircuitsInputOutput153.01RReference1.25 V20 µAReset20.03R3.8 VDelayDelayOverCurrentDetectorGround4.2–10 RThermalReset2004 1.25 V3Motorola Master Selection Guide
Voltage Regulator/Supervisory (continued)Very Low Dropout RegulatorOutputVoltage (Vout)VZ 38L4949N, DTJ –40 to 125 C, Case 626, 751The L4949 is a monolithic integrated5.0 V voltage regulator with a very lowdropout and additional functions such aspower–on reset and input voltage sense.It is designed for supplying themicro–computercontrolledsystemsespecially in automotive applications.SupplyVoltage (VCC)CT 4Preregulator6.0 V12.0 µAReset6 Operating DC Supply Voltage Range5.0 V to 28 V Transient Supply Voltage Up to 40 V Extremely Low Quiescent Current inStandby Mode High Precision Standby Output Voltage5.0 V 1% Output Current Capability Up to100 mA Very Low Dropout Voltage Less Than0.4 V Reset Circuit Sensing The OutputVoltage Programmable Reset Pulse Delay WithExternal Capacitor Voltage Sense Comparator Thermal Shutdown and Short CircuitProtections –RegulatorSenseInput(Si)2.0 VSenseOutput(So)ResetVs72 –1.23 Vref1.23 VSense5GndPower Management ControllerMC33128DVCCVBB CPCTA –30 to 60 C, Case 751BThe MC33128 is a power managementcontroller specifically designed for use inbattery powered cellular telephone andpager applications. This device contains allof the active functions required to interfacethe user to the system electronics via amicroprocessor. This integrated circuitconsists of a low dropout voltage regulatorwith power–up reset for MPU power, twolow dropout voltage regulators forindependant powering of analog and digitalcircuitry, and a negative charge pumpvoltage regulator for full depletion of galliumarsenide MESFETs.Also included are protective systemshutdown features consisting of a batterylatch that is activated upon batteryinsertion, low battery voltage shutdown,and a thermal over temperature detector.This device is available in a 16–pin narrowbody surface mount plastic package.Motorola Master Selection Guide16311109VBB OutputChargePumpOutput 4CPC7ControlLogicLow BatteryShutdownNegativeStandbyRegulator5Output 4–2.5 V/1.0 mAStandbyRegulator 115Output 13.0 V/30 mA1Output 23.0 V/60 mAThermalProtectionStandbyRegulator 214ReferenceMPURegulatorMPU PowerUp Reset13Gnd4.2–1148 “On”/“Off”Toggle2612Reference OutputOutput 33.0 V/20 mAR VDDI MPUOOI VSSAnalog and Interface Integrated Circuits
GaAs Power Amplifier Support ICMC33169DTBTA –40 to 85 C, Case 948GThe MC33169 is a support IC for GaAsPower Amplifier Enhanced FETs used inhand portable telephones such as GSM,PCN and DECT. This device providesnegative voltages for full depletion ofEnhanced MESFETs as well as a prioritymanagement system of drain switching,ensuring that the negative voltage is alwayspresent before turning “on” the PowerAmplifier. Additional features include anidle mode input and a direct drive of theN–Channel drain switch transistor.This product is available in two versions,– 2.5 and – 4.0 V. The – 4.0 V version isintended for supplying RF modules forGSM and DCS1800 applications, whereasthe – 2.5 V version is dedicated for DECTand PHS systems. Negative Regulated Output for FullDepletion of GaAs MESFETs Drain Switch Priority ManagementCircuit CMOS Compatible Inputs Idle Mode Input (Standby Mode) forVery Low Current Consumption Output Signal Directly DrivesN–Channel FET Low Startup and Operating CurrentAnalog and Interface Integrated CircuitsC3 VBB Double12 –– C1C2 1VBB 11 3Triple C4–2 VCC148VBBGeneratorMC33169(Voltage Tripler)Tx PowerControl 9InputPriorityManagement13IdleMode Input6GndVBattery(2.7 to 7.0 V)MMSF4N01HDGate Drive OutputRFInRFOutPower AmplifierSense10Sense InputNegativeGeneratorChargePump74.2–124 – VCiOCpOutput(– 2.5 V or – 4.0 V)– 5C fRfMotorola Master Selection Guide
SCSI RegulatorTable 5. SCSI RegulatorVout(V)DeviceD ad(%)TJ( C)Suffix/Package2.812.898003.9200.30.5150D/751, DTSCSI–2 Active Terminator RegulatorMC34268D, DTTJ 0 to 125 C, Case 751, 369A The MC34268 is a medium current, low dropout positivevoltage regulator specifically designed for use in SCSI–2active termination circuits. This device offers the circuitdesigner an economical solution for precision voltageregulation, while keeping power losses to a minimum. Theregulator consists of a 1.0 V dropout composite PNP/NPNpass transistor, current limiting, and thermal limiting. Thesedevices are packaged in the 8–pin SOP–8 and 3–pin DPAKsurface mount power packages.Applications include active SCSI–2 terminators and postregulation of switching power supplies.2.85 V Output Voltage for SCSI–2 Active Termination1.0 V DropoutOutput Current in Excess of 800 mAThermal ProtectionShort Circuit ProtectionOutput Trimmed to 1.4% ToleranceNo Minimum Load RequiredSpace Saving DPAK and SOP–8 Surface Mount rentLimitOutputGroundMotorola Master Selection Guide4.2–13Analog and Interface Integrated Circuits
Switching Regulator Control Circuitsand are designed to drive many of the standard switchingtopologies. The single–ended configurations include buck,boost, flyback and forward converters. The double–endeddevices control push–pull, half bridge and full bridgeconfigurations.These devices contain the primary building blocks whichare required to implement a variety of switching powersupplies. The product offerings fall into three major categoriesconsisting of single–ended and double–ended controllers,plus single–ended ICs with on–chip power switch transistors.These circuits operate in voltage, current or resonant modesTable 6. Single–Ended ControllersThese single–ended voltage and current mode controllers are designed for use in buck, boost, flyback, and forwardconverters. They are cost effective in applications that range from 0.1 to 200 W power output.IO(mA)Max500(Uncommitted(Ui dDrive ode7.0 to 40VoltageReferenceR f(V)MaximumUsefulOscillatorFrequency(kHz)D iDeviceTA( C)Suffix/S ffi /Package5.0 1.5%200MC34060A0 to 70D/751AMC33060A–40 to 85D/751AP/646P/6461000(T tP l MOSFET(TotemPoleDrive Output)4.2 to 12Current1.25 2.0%300MC341290 to 70D/751AMC33129–40 to 85D/751AUC3842A0 to 70D/751AUC2842A–25 to 85D/751AP/646P/64611.5 to 305.0 2.0%11 to 305.0 1.0%500N/626N/6268.2 to 305.0 2.0%UC3843A0 to 70D/751A5.0 1.0%UC2843A–25 to 85D/751AUC38440 to 70D/751AN/626N/62611.5 to 3011 to 305.0 2.0%5.0 1.0%500(50% DutyDCycle Limit)N/626UC2844–25 to 85D/751AN/6268.2 to 305.0 2.0%UC38450 to 70D/751A5.0 1.0%UC2845–25 to 85D/751AUC3842B0 to 70D/751AN/626N/62611.5 to 30Analog and Interface Integrated Circuits5.0 ncyGuaranteedat 250 kHz)4.2–14D1/751N/626UC3842BV–40 to 105D/751AD1/751N/626Motorola Master Selection Guide
Table 6. Single–Ended Controllers (continued)These single–ended voltage and current mode controllers are designed for use in buck, boost, flyback, and forwardconverters. They are cost effective in applications that range from 0.1 to 200 W power output.IO(mA)Max1000(T tPl MOSFET(TotemPoleDrive eReference(V)11 to 30Current5.0 1.0%5.0 2.0%8.2 to edat 250 kHz)DeviceTA( C)Suffix/PackageUC2842B–25 to 85D/751AD1/751N/626UC3843B0 to 70D/751AD1/751N/626UC3843BV–40 to 105D/751AD1/751N/6265.0 1.0%UC2843B–25 to 85D/751AD1/751N/6265.0 2.0%11.5 to 30500(50% DutyDCycle Limit)UC3844B0 to 70D/751AD1/751N/626UC3844BV–40 to 105D/751AD1/751N/6265.0 1.0%11 to 30UC2844B–25 to 85D/751AD1/751N/6265.0 2.0%8.2 to 30UC3845B0 to 70D/751AD
The switching power supply continues to increase in popularity and is one of the fastest growing markets in the world of power conversion. They offer the designer several important advantages over linear series–pass regulators. These advantages include significant advancements in the are
