34063API datasheet(4/15 Pages) ONSEMI

4 / 15 page

MC34063A, MC33063A, SC34063A, SC33063A, NCV33063A

http://onsemi.com

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

100

120

140

160

180

Figure 3. Oscillator Frequency

VCC = 5.0 V, Pin 7 = VCC

Pin 5 = GND, TA = 25°C

Ct, TIMING CAPACITOR CAPACITANCE (nF)

ON TIME (ms)

OFF TIME (ms)

FREQUENCY (kHz)

VCC = 5.0 V

Pin 7 = VCC

Pin 2 = GND

Pins 1, 5, 8 = Open

CT = 1.0 nF

TA = 25°C

Figure 4. Timing Capacitor Waveform

ms/DIV

Figure 5. Emitter Follower Configuration Output

Saturation Voltage versus Emitter Current

Figure 6. Common Emitter Configuration Output

Switch Saturation Voltage versus

Collector Current

Figure 7. Current Limit Sense Voltage

versus Temperature

Figure 8. Standby Supply Current versus

Supply Voltage

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

IE, EMITTER CURRENT (A)

VCC = 5.0 V

Pins 1, 7, 8 = VCC

Pins 3, 5 = GND

TA = 25°C

(See Note 7)

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

IC, COLLECTOR CURRENT(A)

Darlington Connection

Forced

b = 20

-55

-25

100

125

TA, AMBIENT TEMPERATURE (°C)

VCC = 5.0 V

Ichg = Idischg

5.0

VCC, SUPPLY VOLTAGE (V)

CT = 1.0 nF

Pin 7 = VCC

Pin 2 = GND

1.8

1.7

1.6

1.5

1.4

1.3

1.2

1.1

1.0

1.1

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

400

380

360

340

320

300

280

260

240

220

200

3.6

3.2

2.4

2.0

1.6

1.2

0.8

0.4

1.0

2.8

VCC = 5.0 V

Pin 7 = VCC

Pins 2, 3, 5 = GND

TA = 25°C

(See Note 7)

7. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible.

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