MC33063ADR2中文资料

© Semiconductor Components Industries, LLC, 2000August, 2000 – Rev. 61Publication Order Number:

MC34063A/D

MC34063A, MC33063ADC-to-DC Converter Control Circuits

The MC34063A Series is a monolithic control circuit containing theprimary functions required for DC–to–DC converters. These devicesconsist 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 specificallydesigned to be incorporated in Step–Down and Step–Up andVoltage–Inverting applications with a minimum number of externalcomponents. Refer to Application Notes AN920A/D and AN954/Dfor 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 2% Reference

Representative Schematic DiagramSQRQ2

Q1100

Ipk

OscillatorC

T

Comparator+-1.25 V

ReferenceRegulator

123456

78Drive

Collector

Ipk

Sense

VCC

ComparatorInvertingInput

SwitchCollector

SwitchEmitter

TimingCapacitor

Gnd(Bottom View)

This device contains 51 active transistors.

http://onsemi.comSO–8D SUFFIXCASE 751

PDIP–8P, P1 SUFFIXCASE 6261

8

18

18SOEIAJ–8M SUFFIXCASE 968

See detailed ordering and shipping information in the packagedimensions section on page 11 of this data sheet.

ORDERING INFORMATION

See general marking information in the device markingsection on page 11 of this data sheet.

DEVICE MARKING INFORMATION

1SwitchCollector

SwitchEmitter

TimingCapacitor

Gnd

DriverCollector

Ipk Sense

VCC

ComparatorInvertingInput

(Top View)

23456

78PIN CONNECTIONS

元器件交易网www.cecb2b.comMC34063A, MC33063A

http://onsemi.com2

MAXIMUM RATINGSRatingSymbolValueUnitPower Supply VoltageVCC40VdcComparator Input Voltage RangeVIR–0.3 to +40VdcSwitch Collector VoltageVC(switch)40VdcSwitch Emitter Voltage (VPin 1 = 40 V)VE(switch)40VdcSwitch Collector to Emitter VoltageVCE(switch)40VdcDriver Collector VoltageVC(driver)40VdcDriver Collector Current (Note 1.)IC(driver)100mASwitch CurrentISW1.5APower Dissipation and Thermal CharacteristicsPlastic Package, P, P1 SuffixTA = 25°CPD1.25WThermal ResistanceRθJA100°C/WSOIC Package, D SuffixTA = 25°CPD625WThermal ResistanceRθJA160°C/W

Operating Junction TemperatureTJ+150°COperating Ambient Temperature RangeTA°CMC34063A 0 to +70MC33063AV–40 to +125MC33063A–40 to +85

Storage Temperature RangeTstg–65 to +150°C1.Maximum package power dissipation limits must be observed.2.ESD data available upon request.

元器件交易网www.cecb2b.comMC34063A, MC33063A

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ELECTRICAL CHARACTERISTICS (VCC = 5.0 V, TA = Tlow to Thigh [Note 3.], unless otherwise specified.)

CharacteristicsSymbolMinTypMaxUnitOSCILLATORFrequency (VPin 5 = 0 V, CT = 1.0 nF, TA = 25°C)fosc243342kHz

Charge Current (VCC = 5.0 V to 40 V, TA = 25°C)Ichg243542µADischarge Current (VCC = 5.0 V to 40 V, TA = 25°C)Idischg140220260µADischarge to Charge Current Ratio (Pin 7 to VCC, TA = 25°C)Idischg/Ichg5.26.57.5–Current Limit Sense Voltage (Ichg = Idischg, TA = 25°C)Vipk(sense)250300350mVOUTPUT SWITCH (Note 4.)Saturation Voltage, Darlington Connection(ISW = 1.0 A, Pins 1, 8 connected)VCE(sat)–1.01.3V

Saturation Voltage (Note 5.)(ISW = 1.0 A, RPin 8 = 82 Ω to VCC, Forced β ] 20)VCE(sat)–0.450.7VDC Current Gain (ISW = 1.0 A, VCE = 5.0 V, TA = 25°C)hFE5075––Collector Off–State Current (VCE = 40 V)IC(off)–0.01100µACOMPARATORThreshold VoltageTA = 25°CTA = Tlow to ThighVth1.2251.211.25–1.2751.29

V

Threshold Voltage Line Regulation (VCC = 3.0 V to 40 V)MC33063A, MC34063AMC33363AVRegline––1.41.45.06.0mVInput Bias Current (Vin = 0 V)IIB––20–400nATOTAL DEVICESupply Current (VCC = 5.0 V to 40 V, CT = 1.0 nF, Pin 7 = VCC,VPin 5 > Vth, Pin 2 = Gnd, remaining pins open)ICC––4.0mA

3.Tlow = 0°C for MC34063A, –40°C for MC33063A, AV Thigh = +70°C for MC34063A, +85°C for MC33063A, +125°C for MC33063AV4.Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.5.If the output switch is driven into hard saturation (non–Darlington configuration) at low switch currents (≤ 300 mA) and high driver currents(≥30 mA), it may take up to 2.0 µs for it to come out of saturation. This condition will shorten the off time at frequencies ≥ 30 kHz, and ismagnified at high temperatures. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If anon–Darlington configuration is used, the following output drive condition is recommended: