otherwise specified, see note 2)

OSCILLATOR

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Frequency

243342

KHz

Charge Currernt

24

33

42

µA

Discharge Current

140

200

260

µA

Current Ratio

5.2

6.2

7.5

250

300

350

mV

OUTPUT SWITCH

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Saturation Voltage,

Darlington Connection

Pins 1, 8 connected

1

1.3

V

Saturation Voltage

Forced

β ~ 20

0.45

0.7

V

DC Current Gain

120

Collector Off-State Current

0.01

100

µA

COMPARATOR

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Threshold Voltage

1.225

1.21

1.25

1.275

1.29

V

V

Threshold Voltage Line

Regulation

1

5

mV

Input Bias Current

-5

-400

nA

TOTAL DEVICE

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Supply Current

Remaining pins open

for MC34063A

for MC34063E

2.5

1.5

4

4

mA

mA

µF

Pin 5 = 0 V

for MC34063A

for MC34063E

2.1

1.5

V

V

NOTES:

1) Maximum package power dissipation limit must be observed.

3) If Darlington configuration is not used, care must be taken to avoid deep saturation of output switch. The resulting switch-off time may be

adversely affected. In a Darlington configuration the following output driver condition is suggested:

Forced

* Current less due to a built in 1K

Ω antileakage resistor.

4) Start-up Voltage is the minimum Power Supply Voltage at which the internal oscillator begins to work.

MC34063A/E

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