1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER

AZ34063A

Data Sheet

6

Sep. 2006 Rev. 1. 3

BCD Semiconductor Manufacturing Limited

Figure 4. Output Switch On-Off Time vs.

Figure 5. Timing Capacitor Waveform

Typical Performance Characteristics

Oscillator Timing Capacitor

≥ 10

Forced

β of output switch:

* The 100

Ω resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.

Time. 10

µs/DIV

Pin 1,5,8=open

Figure 6. Oscillator Frequency vs.Timing Capacitor

Figure 7. Standard Supply Current vs. Supply Voltage

Electrical Characteristics (Continued)

0.1

1

10

100

1

10

100

V

CC

=5.0V

V

PIN7

=V

CC

V

PIN5

=GND

T

A

=25

C

T

, Oscillator Timing Capacitor (nF)

0

5

10

15

20

25

30

35

40

0.5

1.0

1.5

2.0

2.5

3.0

3.5

C

T

=1.0nF

V

PIN7

=V

CC

V

PIN2

=GND

V

CC

. Supply Voltage (V)

0.1

1

10

100

1

10

100

1000

t

off

t

on

V

CC

=5.0V

V

PIN7

=V

CC

V

PIN5

=GND

T

A

=25

C

T

, Oscillator Timing Capacitor (nF)