MC34063A 查看數據表（PDF） - Estek Electronics Co. Ltd

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MC34063A

monolithic control circuit containing the primary functions required for DC-to-DC converters

Estek Electronics Co. Ltd 

Absolute Maximum Ratings

Symbol

VCC

VIR

VC(switch)

VE(switch)

VCE(switch)

VC(driver)

IC(driver)

ISW

TJ

TA

Tstg

Parameter

Power Supply Voltage

Comparator Input Voltage Range

Switch Collector Voltage

Switch Emitter Voltage (VPIN1 = 40 V)

Switch Collector to Emitter Voltage

Driver Collector Voltage

Driver Collector Current (Note 1)

Switch Current

Operating Junction Temperature

Operating Ambient Temperature Range

Storage Temperature Range

34063

Maximum

40

-0.3 to +40

40

40

40

40

100

1.5

+150

0 to +70

-65 to +150

Units

Vdc

Vdc

Vdc

Vdc

Vdc

Vdc

mA

A

°C

°C

°C

Electrical Characteristics

(Vcc=5.0V, Ta=Tlow to Thigh , unless otherwise

specified)

Characteristics

OSCILLATOR

Frequency (Vpin5 = 0V, CT = 1.0 nF, TA = 25°C)

Charge Current(VCC = 5.0V to 40V, TA = 25°C)

Discharge Current (VCC = 5.0V to 40V, TA = 25°C)

Discharge to Charge Current Ratio (Pin 7 to VCC, TA = 25°C)

Current Limit Sense Voltage (Ichg = Idischg, TA = 25°C)

OUTPUT SWITCH (NOTE 2)

Saturation Voltage, Darlington Connection (ISW = 1.0 A, Pins 1, 8 connected)

Saturation Voltage, Darlington Connection (ISW = 1.0 A, Rpin 8 = 82Ω to VCC , Forced β ≅ 20)

DC Current Gain (ISW = 1.0 A, VCE = 5.0 V, TA = 25°C)

Collector Off-State Current (VCE = 40 V)

COMPARATOR

Threshold Voltage

(TA=25°C)

(TA =Tlow to Thigh)

Threshold Voltage Line Regulation

(Vcc=3.0 V to 40 V)

Input Bias Current

(Vin=0 V)

TOTAL DEVICE

Supply Current (Vcc = 5.0 V to 40 V, CT = 1.0 nF, Pin 7 = VCC, Vpin 5 > Vth, Pin 2 =

Gnd, remaining pins open)

Symbol Min Typ Max Units

fOSC

24 33 42 kHz

Ichg

24 35 42 µA

Idischg

140 220 260 µA

Idischg /

5.2 6.5 7.5

–

Ichg

Vipk(sence) 250 300 350 mV

VCE(sat)

VCE(sat)

hFE

IC(off)

– 1.0 1.3

V

– 0.45 0.7

V

50 75 –

–

– 40 100 µA

Vth

V

1.225 1.25 1.275

1.21 – 1.29

Regline

– 1.4 5.0 mV

IIB

– -20 -400 nA

ICC

– – 4.0 mA

NOTES : 1.Maximum package power dissipation limits must be observed.

2.Low duty cycle pulse techniques are used during test to maintain junction temperature

as close to ambient temperature as possible

BEIJING ESTEK ELECTRONICS CO.,LTD

2

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