MC34063A MC33063A

7

MOTOROLA ANALOG IC DEVICE DATA

1.25 V

Ref

Reg

Vout

–12 V/100 mA

Vout

1.0

µH

+

100

Optional Filter

8

7

Rsc

0.24

6

Vin

4.5 V to 6.0 V

100

+

5

R2

8.2 k

SQ

R

Q2

Q1

Ipk

Osc

CT

Comp.

R1

953

1

2

3

4

+

1500

pF

+

–

1N5819

1000

µf

+

88

µH

VCC

CO

L

Figure 11. Voltage Inverting Converter

Test

Conditions

Results

Line Regulation

Vin = 4.5 V to 6.0 V, IO = 100 mA

3.0 mV =

±0.012%

Load Regulation

Vin = 5.0 V, IO = 10 mA to 100 mA

0.022 V =

±0.09%

Output Ripple

Vin = 5.0 V, IO = 100 mA

500 mVpp

Short Circuit Current

Vin = 5.0 V, RL = 0.1 Ω

910 mA

Efficiency

Vin = 5.0 V, IO = 100 mA

62.2%

Output Ripple With Optional Filter

Vin = 5.0 V, IO = 100 mA

70 mVpp

12a. External NPN Switch

12b. External PNP Saturated Switch

8

7

6

Vin

1

2

Vout

8

7

6

Vin

1

2

Vout

Figure 12. External Current Boost Connections for IC Peak Greater than 1.5 A