NCP3063, NCP3063B, NCV3063 1.5 A, Step …

1 Semiconductor Components Industries, LLC, 2009 November, 2009 Rev. 91 Publication Order Number:NCP3063/DNCP3063, NCP3063B, A, step -Up/Down/Inverting SwitchingRegulatorsThe NCP3063 Series is a higher frequency upgrade to the popularMC34063A and MC33063A monolithic DC DC converters. Thesedevices consist of an internal temperature compensated reference,comparator, a controlled duty cycle oscillator with an active currentlimit circuit, a driver and a high current output switch. This series wasspecifically designed to be incorporated in step Down, step Up andVoltage Inverting applications with a minimum number of Operation to 40 V Input Low Standby Current Output Switch Current to A Output Voltage Adjustable Frequency Operation of 150 kHz Precision Reference New Features: Internal Thermal Shutdown with HysteresisNew Features: Cycle by Cycle Current Limiting Pb Free Packages are AvailableApplications step Down, step Up and Inverting supply applications High Power LED Lighting Battery ChargersFigure 1.

2 Typical Buck Application CircuitLREFERENCEDCOMPARATOR5R2 RSQSET dominant+ V+ 26R1 RSQ4112 nFOSCILLATOR47 V /800 mA+470 mFCoutVin+220 mFCinSET kWPDIP 8P, P1 SUFFIXCASE 626 8 CASE 488 AFSOIC 8D SUFFIXCASE 75118 NCP3063xAWLYYWWGNCP3063x = Specific Device Codex = BA= Assembly LocationL, WL= Wafer LotY, YY= YearW, WW= Work WeekG= Pb Free Package(Note: Microdot may be in either location)See detailed ordering and shipping information in the packagedimensions section on page 16 of this data INFORMATIONV3063 ALYW G13063xALYW G1 NCV3063 AWLYYWWG1118 NCP3063xALYWGNCP3063 ALYWG1 NCP3063, NCP3063B, NCV3063 2. Pin ConnectionsTiming SenseGNDS witch EmitterSwitch Collector(Top View)43215678 SenseTiming CapacitorGNDS witch EmitterSwitch Collector(Top View)Figure 3. Pin ConnectionsNOTE:EP Flag must be tied to GND Pin 4on PCBEP FlagFigure 4.

3 Block DiagramREFERENCECOMPARATOR5 RSQSET dominant+ V+ 26 RSQ41 OSCILLATORS witch CollectorSwitch EmitterTiming CapacitorGNDC omparator Inverting Input+VCCIpk dominantNCP3063, NCP3063B, NCV3063 DESCRIPTIONPin NameDescription1 Switch CollectorInternal Darlington switch collector2 Switch EmitterInternal Darlington switch emitter3 Timing CapacitorOscillator InputTiming Capacitor4 GNDG round pin for all internal circuits5 ComparatorInverting InputInverting input pin of internal comparator6 VCCV oltage Supply7 Ipk SensePeak Current Sense Input to monitor the voltage drop across an external resistor to limit the peakcurrent through the Not ConnectedExposedPadExposed PadThe exposed pad beneath the package must be connected to GND (Pin 4). Additionally, usingproper layout techniques, the exposed pad can greatly enhance the power dissipation capabilitiesof the RATINGS (measured vs.)

4 Pin 4, unless otherwise noted)RatingSymbolValueUnitVCC pin 6 VCC0 to +40 VComparator Inverting Input pin 5 VCII to + VCCVD arlington Switch Collector pin 1 VSWC0 to +40 VDarlington Switch Emitter pin 2 (transistor OFF)VSWE to + VCCVD arlington Switch Collector to Emitter pin 1 2 VSWCE0 to +40 VDarlington Switch Sense Pin 7 VIPK to VCC + Capacitor Pin 3 VTCAP to + DISSIPATION AND THERMAL CHARACTERISTICSR atingSymbolValueUnitPDIP 8 Thermal Resistance, Junction to AirRqJA100 C/WSOIC 8 Thermal Resistance, Junction to AirThermal Resistance, Junction to CaseRqJARqJC18045 C/WDFN 8 Thermal Resistance, Junction to AirRqJA80 C/WStorage Temperature RangeTSTG 65 to +150 CMaximum Junction TemperatureTJ MAX+150 COperating Junction Temperature Range (Note 3)NCP3063 NCP3063B, NCV3063TJ0 to +70 40 to +125 CStresses exceeding Maximum Ratings may damage the device.

5 Maximum Ratings are stress ratings only. Functional operation above theRecommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affectdevice This device series contains ESD protection and exceeds the following tests:Pin 1 8: Human Body Model 2000 V per AEC Q100 002; 003 or JESD22/A114; A115 Machine Model Method 200 V2. This device contains latch up protection and exceeds 100 mA per JEDEC Standard The relation between junction temperature, ambient temperature and Total Power dissipated in IC is TJ = TA + Rq PD4. The pins which are not defined may not be loaded by external signalsNCP3063, NCP3063B, NCV3063 CHARACTERISTICS (VCC = V, TJ = Tlow to Thigh [Note 5], unless otherwise specified)SymbolCharacteristicConditions MinTypMaxUnitOSCILLATORfOSCF requency(VPin 5 = 0 V, CT = nF,TJ = 25 C)110150190kHzIDISCHG /ICHGD ischarge to Charge Current Ratio(Pin 7 to VCC, TJ = 25 C) IDISCHGC apacitor Discharging Current(Pin 7 to VCC, TJ = 25 C)1650mAICHGC apacitor Charging Current(Pin 7 to VCC, TJ = 25 C)275mAVIPK(Sense)Current Limit Sense Voltage(TJ = 25 C) (Note 6)165200235mVOUTPUT SWITCH (Note 7)VSWCE(DROP)Darlington Switch Collector toEmitter Voltage Drop(ISW = A, Pin 2 to GND,TJ = 25 C) (Note 7) (OFF)Collector Off State Current(VCE = 40 V)

6 VoltageTJ = 25 + , NCV3063 2+2%REGLiNEThreshold Voltage Line Regulation(VCC = V to 40 V) inInput Bias Current(Vin = Vth) 1000 1001000nATOTAL DEVICEICCS upply Current(VCC = V to 40 V,CT = nF, Pin 7 = VCC,VPin 5 > Vth, Pin 2 = GND,remaining pins open) Shutdown Threshold160 CHysteresis10 C5. NCP3063: Tlow = 0 C, Thigh = +70 C;NCP3063B, NCV3063 : Tlow = 40 C, Thigh = +125 C6. The VIPK(Sense) Current Limit Sense Voltage is specified at static conditions. In dynamic operation the sensed current turn off value dependson comparator response time and di/dt current slope. See the Operating Description section for Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as NCV prefix is for automotive and other applications requiring site and change , NCP3063B, NCV3063 5.

7 Oscillator Frequency vs. OscillatorTiming CapacitorFigure 6. Oscillator Frequency vs. SupplyVoltageCt, CAPACITANCE (nF)VCC, SUPPLY VOLTAGE (V)402925161273110120130150160170180190 Figure 7. Emitter Follower Configuration OutputDarlington Switch Voltage Drop vs. TemperatureFigure 8. Common Emitter Configuration OutputDarlington Switch Voltage Drop vs. TemperatureTJ, JUNCTION TEMPERATURE ( C)TJ, JUNCTION TEMPERATURE ( C)150100500 9. Emitter Follower Configuration OutputDarlington Switch Voltage Drop vs. Emitter CurrentFigure 10. Common Emitter ConfigurationOutput Darlington Switch Voltage Drop CurrentIE, EMITTER CURRENT (A)IC, COLLECTOR CURRENT (A) (kHz)FREQUENCY (kHz)213438140CT = nFTJ = 25 CVOLTAGE DROP (V)VCC = VIE = 1 AVOLTAGE DROP (V)VCC = VIC = 1 AVOLTAGE DROP (V)VOLTAGE DROP (V) = VTJ = 25 CVCC = VTJ = 25 C0501001502002503003504004500 1 2 3 4 5 6 7 8 9 10 11 12 1314 1516 1718 1920 NCP3063, NCP3063B, NCV3063 11.

8 Comparator Threshold Voltage 12. Current Limit Sense Voltage , JUNCTION TEMPERATURE ( C)TJ, JUNCTION TEMPERATURE ( C)1259535205 25 10 25 13. Standby Supply Current vs. Supply VoltageVCC, SUPPLY VOLTAGE (V) , COMPARATOR THRESHOLD VOLTAGE (V)Vipk(sense), CURRENT LIMIT SENSEVOLTAGE (V)2095 , SUPPLY CURRENT (mA)CT = nFPin 5, 7 = VCCPin 2 = GND , NCP3063B, NCV3063 NCP3063 is a monolithic power switching regulatoroptimized for dc to dc converter applications. Thecombination of its features enables the system designer todirectly implement step up, step down, and voltage inverting converters with a minimum number of externalcomponents. Potential applications include cost sensitiveconsumer products as well as equipment for industrialmarkets. A representative block diagram is shown inFigure DescriptionThe NCP3063 is a hysteretic, dc dc converter that uses agated oscillator to regulate output voltage.

9 In general, thismode of operation is somewhat analogous to a capacitorcharge pump and does not require dominant pole loopcompensation for converter stability. The Typical OperatingWaveforms are shown in Figure 14. The output voltagewaveform shown is for a step down converter with theripple and phasing exaggerated for clarity. During initialconverter startup, the feedback comparator senses that theoutput voltage level is below nominal. This causes theoutput switch to turn on and off at a frequency and duty cyclecontrolled by the oscillator, thus pumping up the output filtercapacitor. When the output voltage level reaches nominal,the output switch next cycle turning on is inhibited. Thefeedback comparator will enable the switching immediatelywhen the load current causes the output voltage to fall belownominal.

10 Under these conditions, output switch conductioncan be enabled for a partial oscillator cycle, a partial cycleplus a complete cycle, multiple cycles, or a partial cycle plusmultiple cycles. (See AN920/D for more information).OscillatorThe oscillator frequency and off time of the output switchare programmed by the value selected for timing capacitorCT. Capacitor CT is charged and discharged by a 1 to 6 ratiointernal current source and sink, generating a positive goingsawtooth waveform at Pin 3. This ratio sets the maximumtON/(tON + tOFF) of the switching converter as 6/(6 + 1) (typical) The oscillator peak and valley voltagedifference is 500 mV typically. To calculate the CT capacitorvalue for required oscillator frequency, use the equationsfound in Figure 15. An Excel based design tool can be foundat on the NCP3063 product 14.