Diodes AZ34063A - Manual (Page 6)

1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063A
Data Sheet
6
Jan. 2013 Rev. 1. 6 BCD Semiconductor Manufacturing Limited
Figure 4. Output Switch On-Off Time vs. Figure 5. Timing Capacitor Waveform
Typical Performance Characteristics
Oscillator Timing Capacitor
I
C
output
≥ 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.
I
C
driver - 7.0mA*
Time. 10 μs/DIV
V
OSC
. Oscillator V
o
ltage
(V
)
200mV
/DI
V
Pin 1,5,8=open
C
T
=1.0nF
T
A
=25 o C
V
CC
=5.0V
V
PIN7
=V
CC
V
PIN2
=GND
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 O C
Frequency
(KHz
)
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 I CC
. Suppl
y C
urr
e
nt
(
m
A)
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 O C
T
on-of
f. O
u
tput Switch O
n
-O
ff
Tim
e
(μ
s)
C
T
, Oscillator Timing Capacitor (nF)